Additives Reference

TR number 03/TR/1/ 00001 03/TR/1/ 00002 03/TR/1/ 00003 03/TR/1/ 00004 03/TR/1/ 00005 03/TR/1/ 00006 03/TR/1/ 00007 03/TR/1/ 00008 03/TR/1/ 00009 03/TR/1/ 00010 03/TR/1/ 00011 03/TR/1/ 00012 03/TR/1/ 00013 03/TR/1/ 00014 03/TR/1/ 00015 03/TR/1/ 00016 03/TR/1/ 00017 03/TR/1/ 00018 03/TR/1/ 00019 03/TR/1/ 00020 03/TR/1/ 00021 03/TR/1/ 00022 03/TR/1/ 00023 03/TR/1/ 00024 03/TR/1/ 00025 03/TR/1/ 00026 03/TR/1/ 00027 03/TR/1/ 00028 03/TR/1/ 00029 03/TR/1/ 00030 03/TR/1/ 00031 03/TR/1/ 00032 03/TR/1/ 00033 03/TR/1/ 00034 03/TR/1/ 00035 03/TR/1/ 00036 03/TR/1/ 00037 03/TR/1/ 00038 03/TR/1/ 00039 03/TR/1/ 00040 03/TR/1/ 00041 03/TR/1/ 00042 03/TR/1/ 00043 03/TR/1/ 00044 03/TR/1/ 00045 03/TR/1/ 00046 03/TR/1/ 00047 03/TR/1/ 00048 03/TR/1/ 00049 03/TR/1/ 00050

Trade name ABE 68 Acetic Acid Acetic Acid (version 1) (=(80%) Acetic Acid 30% ACIDGEN HA Ammonium Bifluoride (version 1) Ammonium Chloride (version 1) Antifoam Agent D175 Anti-Settling Agent D153 Arcasolve HT Starch Breaker Enzyme Barite Barite Barite (Milbar) Barite D31 Baryte Bentonite Bentonite Bentonite (Milben) BF-10LE ( version 1) BF-3 (version 1) BF-7L (version 1) Biozan Calcium Bromide Calcium Bromide Brine Calcium Carbonate (All grades) Calcium Carbonate D151 Calcium Chloride Calcium Chloride (all grades) Calcium chloride (all grades) Calcium Chloride Brine Calcium Chloride Powder Caustic Soda (Sodium Hydroxide) Caustic Soda Solution (version1) Cebodol 325 (=Dolomiet) CemD* Weigting Agent D166 (Silica sand) Cement Class G D907 Cement Retarder D110 CemPLUS*Geo D178 (Micro silica) Citric Acid Citric Acid Citric Acid Citric Acid Citric Acid 50% solution D095 Cement Additive D-4G (version 1) D-4GB (version 1) Dolomite Environmentally Friendly Dispersant B165 ES Base Oil J504 Ferrotrol 210C (version 1)

Temporary Registration Numbers

Supplier/Manufacturer Application Function Baker Hughes Inteq Drilling Lubricant for water-based muds BJ Services Completion Stimulation BJ Services International BV Completion and stimulation Well stimulation chemical OWT Services BV Stimulation Acid Cleansorb Ltd Completion and stimulation Completion/Stimulation fluid additive BJ Services International BV Completion and stimulation Well stimulation chemical BJ Services International BV Completion and Stimulation Other Schlumberger Cementing Antifoam Agent D175 Schlumberger Cementing Anti-Settling Agent Cleansorb Ltd Completion and stimulation Completion/Stimulation fluid additive M-I Drilling Fluids BV Drilling As a weighting agent in drilling fluids Baroid Drilling Fluids, (Halliburton Manufacturing and Drilling Services and Ltd.) completion Weighting agent Baker Hughes Inteq Drilling Weighting agent for all muds Schlumberger Cementing Weigting agent in cementing Cebo Holland BV Drilling As a weighting agent in drilling fluids M-I Drilling Fluids BV Drilling As a fiscosifier in drilling fluids Baroid Drilling Fluids, (Halliburton Manufacturing and Drilling Services Ltd.) Viscosifier Baker Hughes Inteq Drilling Viscosifier for water-based mud BJ Services International BV Completion and stimulation PH control BJ Services International BV Completion and stimulation PH control BJ Services International BV Completion and stimulation PH control Baker Hughes Inteq Drilling Viscosifier for water-based muds M-I Drilling Fluids BV Drilling For brine phase in invert drilling fluids Baroid Drilling Fluids, (Halliburton Energy Services Ltd.) Drilling and completion Well control M-I Drilling Fluids, Holland Drilling As weighting and bridging agent invert drilling fluids, LCM Schlumberger Cementing Weighting agent Baroid Drilling Fluids, (Halliburton Manufacturing and Drilling Services and Ltd.) completion Well control M-I International BV Drilling For shale inhibition/weighting agent/ brine phase in invert Drilling Fluids Cebo Holland Bv Drilling, Production, Completion and cementing Accellerator for cement slurries M-I Drilling Fluids BV Drilling and completion Water Based mud and Additives Baroid Drilling Fluids, (Halliburton Manufacturing and Drilling Services and Ltd.) completion Weighting agent M-I International BV Drilling Alkalinity control BJ Services International BV Completion and stimulation Acidity control chemical Cebo Holland BV Drilling Weighting agent Schlumberger Cementing Weighting agent Schlumberger Cementing Cementing Schlumberger Cementing Retarder Schlumberger Cementing Weighting agent Baroid Drilling Fluids, (Halliburton Manufacturing and Drilling Services Ltd.) PH control Baker Hughes Inteq Drilling Cement contamination Cebo Holland BV Drilling PH control in drilling fluids M-I Drilling Fluids BV Drilling For PH control in Drilling Fluids BJ Services Company Completion Sequestering Agent Schlumberger Cementing Lost circulation material for cementing BJ Services International BV Completion and stimulation Stimulation BJ Services International BV Completion and stimulation Well stimulation chemical Baroid Drilling Fluids, (Halliburton Manufacturing and Drilling Services Ltd.) Bridging Agent Schlumberger Cementing Dispersant Schlumberger Completion Other completion / workover (Low toxicity synthetic oli for slurriable additives) BJ Services International BV Completion and stimulation Well stimulation chemical

TR list 1

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TR number 03/TR/1/ 00051 03/TR/1/ 00052 03/TR/1/ 00053 03/TR/1/ 00054 03/TR/1/ 00055 03/TR/1/ 00056 03/TR/1/ 00057 03/TR/1/ 00058 03/TR/1/ 00059 03/TR/1/ 00060 03/TR/1/ 00061 03/TR/1/ 00062 03/TR/1/ 00063 03/TR/1/ 00064 03/TR/1/ 00065 03/TR/1/ 00066 03/TR/1/ 00067 03/TR/1/ 00068 03/TR/1/ 00069 03/TR/1/ 00070 03/TR/1/ 00071 03/TR/1/ 00072 03/TR/1/ 00073 03/TR/1/ 00074 03/TR/1/ 00075 03/TR/1/ 00076 03/TR/1/ 00077 03/TR/1/ 00078 03/TR/1/ 00079 03/TR/1/ 00080 03/TR/1/ 00081 03/TR/1/ 00082 03/TR/1/ 00083 03/TR/1/ 00084 03/TR/1/ 00085 03/TR/1/ 00086 03/TR/1/ 00087 03/TR/1/ 00088 03/TR/1/ 00089 03/TR/1/ 00090 03/TR/1/ 00091 03/TR/1/ 00092 03/TR/1/ 00093 03/TR/1/ 00094 03/TR/1/ 00095 03/TR/1/ 00096 03/TR/1/ 00097 03/TR/1/ 00098 03/TR/1/ 00099 03/TR/1/ 00100

Trade name Flexstone HT blend D2600 Flowzan Gas-Migration Control Additive D600G Granulated Salt D44 GS-1 (version1) Guar Gum GW-4AFG (version1) Hematite Hematite Hematite Weighting Agent D76 High Temperature Expanding Additive D176 Hydrochloric Acid (all strength) (version1) Hydroxyethyl Cellulose (HEC) LC Lube Lime Lime Lime LIME LiteCRETE - DeepCRETE 2100 LiteCRETE - DeepCRETE D2085 LiteCRETE - DeepCRETE D2090 LiteCRETE - DeepCRETE D2095 LiteCRETE - DeepCRETE D2105 LiteCRETE - DeepCRETE D2110 LiteCRETE - DeepCRETE D2115 LiteCRETE - DeepCRETE D2120 LiteCRETE - DeepCRETE D2125 LiteCRETE - DeepCRETE D2130 Litefil*D124 Extender Low-temperature Liquid Extender D155 LT Liquid Extender B38 Magnesium Chloride Magnesium Chloride Magnesium Hydroxide Magnesium Oxide Methanol Methanol Methanol (Version 1) Mica Mica Mica (all grades) Mica F/M/C Microfine cement D163 Mid-temp retarder-L D801 Milbar (Barite) Milpac Mudpush* II D182 Multi-temperature Cement Retarder D161 Mutual Solvent U66 Nutshells (all grades)

Temporary Registration Numbers

Supplier/Manufacturer Schlumberger Baker Hughes Inteq Schlumberger Schlumberger BJ Services International bv Baker Hughes Inteq BJ Services International bv M-I Drilling Fluids BV Cebo Holland BV Schlumberger Schlumberger BJ Services International BV Baker Hughes Inteq Baker Hughes Inteq Baker Hughes Inteq Cebo Holland BV M-I Drilling Fluids BV Baroid Drilling Fluids Schlumberger Schlumberger Schlumberger Schlumberger Schlumberger Schlumberger Schlumberger Schlumberger Schlumberger Schlumberger Schlumberger Schlumberger Schlumberger Baroid Drilling Fluids M-I Drilling Fluids BV M-I International BV Baker Hughes Inteq Champion Servo Nalco/Exxon Energy Chemicals Limited BJ Services International BV M-I Drilling Fluids BV Baroid Drilling Fluids Cebo Holland BV Baker Hughes Inteq Schlumberger Schlumberger Baker Hughes Inteq Baker Hughes Inteq Schlumberger Schlumberger Schlumberger Cebo Holland BV

Application Cementing Drilling Cementing Cementing Completion and stimulation Drilling Completion and stimulation Drilling Drilling Cementing Cementing Completion and stimulation Drilling Drilling Drilling Drilling Drilling Drilling Cementing Cementing Cementing Cementing Cementing Cementing Cementing Cementing Cementing Cementing Cementing Cementing Cementing Drilling and completion Drilling Drilling Drilling Production Production Completion and stimulation Drilling Drilling Drilling Drilling Cementing Cementing Drilling Drilling Cementing Cementing Completion Drilling

TR list 1

Function Oil well cement blend Viscosifier for WBM Gas control Agent Accelerator in cementing Gel stabilizer Viscosifier for spud mud Viscosifier Hydrogen sulphide scavenger As a Weighting agent Weighting agent Exopanding additive Well stimulation chemical Rheology and /or fluid loss control Lubricant Alkalinity maintenance For alkalinity control drilling fluids Acidity control in drilling fluids PH/Alkalinity Control Oil well cement blend Oil well cement blend Oil well cement blend Oil well cemenr blend Oil well cement blend Oil well cement blend Oil well cement blend Oil well cement blend Oil well cement blend Oil well cement blend Cement extender Cement Extender Low-temperature cement extender well control For Acidity control in drilling fluids For acidity control in drilling fluids Polymer stabilisation Other Hydrate inhibitor Acidity control chemical As a loss circulation material Lost circulation Material Lost circulation material Lost Circulation Material Cement Liquid retarder Weighting agent for all muds Rheology and/or fluid loss control Spacer Retarder Mutual solvent Lost circulation material

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TR number 03/TR/1/ 00101 03/TR/1/ 00102 03/TR/1/ 00103 03/TR/1/ 00104 03/TR/1/ 00105 03/TR/1/ 00106 03/TR/1/ 00107 03/TR/1/ 00108 03/TR/1/ 00109 03/TR/1/ 00110 03/TR/1/ 00111 03/TR/1/ 00112 03/TR/1/ 00113 03/TR/1/ 00114 03/TR/1/ 00115 03/TR/1/ 00116 03/TR/1/ 00117 03/TR/1/ 00118 03/TR/1/ 00119 03/TR/1/ 00120 03/TR/1/ 00121 03/TR/1/ 00122 03/TR/1/ 00123 03/TR/1/ 00124 03/TR/1/ 00125 03/TR/1/ 00126 03/TR/1/ 00127 03/TR/1/ 00128 03/TR/1/ 00129 03/TR/1/ 00130 03/TR/1/ 00131 03/TR/1/ 00132 03/TR/1/ 00133

Trade name Nutshells-plug (all grades) Potassium Carbonate Potassium Chloride Potassium Chloride Potassium Chloride Potassium Chloride (KCI) Potassium Chloride (version 1) Potassium Chloride Brine Potassium Hydroxide (KOH) Potassiumchloride PozzoCemoil (D 912) SALT PVD / Sodium Chloride Silica Flour D66 Silicate Additive D75 Soda Ash Soda Ash Soda Ash Soda Ash (version 1) Sodium Bicarbonate Sodium Bicarbonate Sodium Bicarbonate Sodium Bicarbonate Sodium Chloride Sodium Chloride Sodium Chloride (Salt PVD) Sodium Chloride PVD Sodiumchloride Squeeze CREATE* Additive D173 Sugar Uniflac S D167 Uniset LT D177 Xanthan D (CEBO Product) Xanthan Gum D

Temporary Registration Numbers

Supplier/Manufacturer Application M-I Drilling Fluids BV Drilling Baker Hughes Inteq Drilling Baroid Drilling Fluids, Halliburton Energy Services Drilling Baker Hughes Inteq Drilling M-I Drilling Fluids BV Drilling BJ Services International BV Completion and stimulation BJ Services International bv Completion and stimulation M-I Drilling Fluids BV Drilling and completion M-I Drilling Fluids BV (BW Registration BW is a subcompany Drilling to M-I) Cebo Holland BV Drilling Schlumberger Cementing M-I Drilling Fluids BV Completion Schlumberger Cementing Schlumberger Cementing M-I Drilling Fluids BV Drilling Baker Hughes Inteq Drilling Baroid Drilling Services Drilling BJ Services International BV Completion and stimulation Baker Hughes Inteq Drilling Cebo Holland BV Drilling M-I Drilling Fluids BV Drilling Baroid Drilling Fluids Drilling Baker Hughes Inteq Drilling Baroid Drilling Fluids Drilling and completion M-I Drilling Fluids BV Drilling Baker Hughes Inteq Drilling Cebo Holland BV Drilling, completion and cementing Schlumberger Cementing Cebo Holland BV Cementing Schlumberger Cementing Schlumberger Cementing M-I Drilling Fluids BV Drilling and completion Baker Hughes Inteq Drilling

TR list 1

Function As a loss circulation material Alkalinity Shale inhibition Salinity ihibition For shale inhibition when using Drilling Fluids Well stimulation chemical Well stimulation chemical Water based mud and Additives PH control (potassium source) Shale (clay) inhibitor Cement Bridgeing agent and weighting agent for Drilling, Workover and Completion fluids. Weighting agent/extender for cementing Extender For calcium control in drilling fluids Calcium removal Hardness Control Acidity control chemical Calcium control Calcium and PH control For calium control in drilling fluids Flocculant Salinity/inhibition Weighting agent and inhibitor Bridgeing agent and weighting agent for workover and completion fluids Salinity / inhibition Water based drilling fluid and cement additive, brine (completion) Gravel packs, casing leaks As cement retarder in cement slurries (prevents setting of liquid cement slurries) Fluid Loss Additive Retarder Viscosifier Viscosifier for water-based muds

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Existing Y N N N Y Y Y Y Y Y N Y Y Y Y N Y Y Y Y Y Y N Y N Y Y N N N N N Y N Y Y Y Y Y Y N Y N Y Y Y N N Y Y

Temporary Registration Numbers

TR list 1

Page 4 of 22

Existing N Y Y Y Y Y Y N N Y Y Y N Y Y N Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y N Y Y Y Y Y Y N Y Y Y Y Y Y Y Y N

Temporary Registration Numbers

TR list 1

Page 5 of 22

Existing N Y Y Y N Y Y Y N N N N Y Y Y Y Y Y Y N Y Y Y Y Y N N Y N Y Y N Y

Temporary Registration Numbers

TR list 1

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TR number 03/TR/2/ 00134 03/TR/2/ 00135 03/TR/2/ 00136 03/TR/2/ 00137 03/TR/2/ 00138 03/TR/2/ 00139 03/TR/2/ 00140 03/TR/2/ 00141 03/TR/2/ 00142 03/TR/2/ 00143 03/TR/2/ 00144 03/TR/2/ 00145 03/TR/2/ 00146 03/TR/2/ 00147 03/TR/2/ 00148 03/TR/2/ 00149 03/TR/2/ 00150 03/TR/2/ 00151 03/TR/2/ 00152 03/TR/2/ 00153 03/TR/2/ 00154 03/TR/2/ 00155 03/TR/2/ 00156 03/TR/2/ 00157 03/TR/2/ 00158 03/TR/2/ 00159 03/TR/2/ 00160 03/TR/2/ 00161 03/TR/2/ 00162 03/TR/2/ 00163 03/TR/2/ 00164 03/TR/2/ 00165 03/TR/2/ 00166 03/TR/2/ 00167 03/TR/2/ 00168 03/TR/2/ 00169 03/TR/2/ 00170 03/TR/2/ 00171 03/TR/2/ 00172 03/TR/2/ 00173 03/TR/2/ 00174 03/TR/2/ 00175 03/TR/2/ 00176 03/TR/2/ 00177 03/TR/2/ 00178 03/TR/2/ 00179 03/TR/2/ 00180

Trade name 20/40 Sand 40/60 Sand 6 UP ACTIVATOR I ACTIVATOR II Activator M7 Aldacide G Aluminium Chloride Ameroyal (version 1) Ammonium Chloride Ammonium Fluoride Antisedimentation Agent B18 Aquacol Aquacol B Aquacol D Aquacol S Aquacol XS AquaPAC R/LV Aquathinz Arcasolve HT Enzyme BA-20 BA-40 Bactericide M291 Bactron B1125 Bactron B1150 Bactron B1700 Bactron B1710 Barabuf Baracarb (all grades) Baracor 100 Baracor 450 Baractive Baraklean FL Plus Baraklean NS Baraklean NS Plus Baraklean Fl Baranex Baraplug (all grades) Barascav D Barascav L Baravis Barazan d Barofibre Barolift BDF-265 BDF-284 BDF-291

Temporary Registration Numbers

Supplier/Manufacturer Application Halliburton Energy Services Completion Halliburton Energy Services Completion Baker Hughes Inteq Drilling M-I Drilling Fluids BV Drilling M-I Drilling Fluids BV Drilling Schlumberger Completion Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services and Completion Ltd) Halliburton Energy Services Completion Ashland Chemical Drew Marine Division Other chemicals M-I Drilling Fluids BV Completion Halliburton Energy Services Completion Schlumberger Cementing Baker Hughes Inteq Drilling Baker Hughes Inteq Drilling Baker Hughes Inteq Drilling Baker Hughes Inteq Drilling Baker Hughes Inteq Drilling Hercules Limited Drilling Baker Hughes Inteq Drilling Cleansorb Ltd Completion and stimulation Halliburton Energy Services Stimulation Halliburton Energy Services Stimulation Dowell Schlumberger Stimulation Champion Servo Production Champion Sevo Production Champion Servo Production Champion Servo Production Baroid Drilling Fluids Drilling and completion Baroid Drilling Fluids (Halliburton Manufacturing Drilling and Services Ltd.) Baroid Drilling Fluids, (Halliburton ManufacturingCompletion and Services Ltd.) Baroid Drilling Fluids, Halliburton Energy Services Drilling and completion Baroid Drilling Fluids Drilling Baroid Drilling Fluid, Halliburton Manufacturing and Completion Services Ltd.) Baroid Drilling Fluids, Halliburton Energy Services Drilliing Baroid Drilling Fluids Completion Baroid Drilling Fluids, Halliburton Energy Services Completion Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services Ltd) Baroid Drilling Fluids, Halliburton manufacturing Drilling and Services and completion Ltd Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services and completion Ltd.) Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services and completion Ltd.) Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services and completion Ltd.) Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services and completion Ltd.) Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services Ltd.) Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd. Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services and completion Ltd) Baroid Drilling Fluids, Halliburton Brown & Root Drilling Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services Ltd.)

TR list 2

Function ? ? Rheology modifier for oil based mud Fluid loss control and stability in the water based mud system (AphonICS). Stabiliser for water based mud called the AphronICS System. Other Completion / Workover (PH control, neutralization, organic clean up) Biocide Other Scale inhibitors Bridgeing agent and weighting agent for workover and completion fluids. Additive Extender for cement slurries Shale inhibitor for water-based muds Shale inhibitor for water-based muds Shale inhibitor for water-based muds Shale inhibitor for water-based muds Shale inhibitor for water-based muds Provide viscosity and prevent fluid loss from water based drilling fluids Thinner for water-based muds Completion/Stimulation additive ? ? Biocide for aqueous systems Biocide Biocide Biocide Biocide PH buffer Bridging agent Corrosion inhibitor Completion (Corrosion inhibitor), Drilling (tracer) Polar activator Well cleaner To clean the well bore and casing Well cleaner Well cleaner Filtration Control Agent Lost circuloation material Oxygen scavenger Oxygen Scavenger Viscosifier Viscosifier Fluid loss control Cuttings removal aid Viscosifier for water based fluid systems Thinner Lubricant for water based drilling fluids

Existing Y Y N Y Y Y Y Y N N N Y Y Y Y Y Y Y Y y Y Y Y Y Y Y Y Y Y Y Y N Y Y Y Y Y Y Y Y Y Y Y Y N Y Y

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TR number 03/TR/2/ 00181 03/TR/2/ 00182 03/TR/2/ 00183 03/TR/2/ 00184 03/TR/2/ 00185 03/TR/2/ 00186 03/TR/2/ 00187 03/TR/2/ 00188 03/TR/2/ 00189 03/TR/2/ 00190 03/TR/2/ 00191 03/TR/2/ 00192 03/TR/2/ 00193 03/TR/2/ 00194 03/TR/2/ 00195 03/TR/2/ 00196 03/TR/2/ 00197 03/TR/2/ 00198 03/TR/2/ 00199 03/TR/2/ 00200 03/TR/2/ 00201 03/TR/2/ 00202 03/TR/2/ 00203 03/TR/2/ 00204 03/TR/2/ 00205 03/TR/2/ 00206 03/TR/2/ 00207 03/TR/2/ 00208 03/TR/2/ 00209 03/TR/2/ 00210 03/TR/2/ 00211 03/TR/2/ 00212 03/TR/2/ 00213 03/TR/2/ 00214 03/TR/2/ 00215 03/TR/2/ 00216 03/TR/2/ 00217 03/TR/2/ 00218 03/TR/2/ 00219 03/TR/2/ 00220 03/TR/2/ 00221 03/TR/2/ 00222 03/TR/2/ 00223 03/TR/2/ 00224 03/TR/2/ 00225 03/TR/2/ 00226 03/TR/2/ 00227

Trade name BDF-301 BDF-303 BDF-331 BDF-349 BDF-353 Bentone 38 Bentonite (All Grades) Bentonite Extender D20 BF-1 (version 1) BIOBASE 637 ( version 1) Bio-Pac Biozan Blue Streak Breaker J481 Cabogel Calcium Bromide Calcium Bromide Brine Calcium Chloride Calcium Chloride - Liquid Calcium Chloride Brine Carbomix Carbomul HT Carbovis Caustic Flake Caustic Soda Caustic soda (sodium Hydroxide) Caustic soda (sodium Hydroxide) Caustic Soda M2 Cebogel Ocma Cement Additive D181 Cement Additive D181 Cement Class G Cement Class G + 35% SSA-1 Cement Liquid Dispersant D80 Cement X-lite CF-2237 CFR-3 CFR-5LE+ CGO 85332 CGW82431 Chek-loss (All grades) Chelating Agent U106 CI-26 CI-27 (version 1) CL-15 Clairsol 370 Class G - Silica Blend D956

Temporary Registration Numbers

Supplier/Manufacturer Application Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services Ltd.) Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services Ltd.) Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd Baroid Drilling Fluids, Halliburton Manufacturing Completion and services Ltd. Completion M-I Drilling Fluids BV Drilling M-I International BV, Holland Drilling Schlumberger Cementing BJ Services International BV Completion and stimulation BJ Services International BV Completion and stimulation Baker Hughes Inteq Drilling M-I Drilling Fluids BV Drilling M-I Drilling Fluids UK Ltd, Scotland Drilling Schlumberger Dowell Stimulation Baker Hughes Inteq Drilling Baroid Ltd Completion M-I Drilling Fluids BV Drilling Baker Hughes House Drilling Halliburton Energy Services Cementing Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services and completion Ltd) Baker Hughes Inteq Drilling Baker Hughes Inteq Drilling Baker Hughes Inteq Drilling Halliburton Energy Services Stimulation Cebo Holland BV Drilling Baker Huges Inteq Drilling Cebo Holland BV Drilling Schlumberger completion Cebo Holland BV Drilling Schlumberger Cementing Schlumberger Cementing Halliburton Energy Services Cementing Halliburton Energy Services Cementing Dowell Schlumberger Cementing Halliburton Energy Services Cementing Baker Petrolite Production Halliburton Energy Services Cementing Halliburton Energy Services Cementing Baker petrolite Production Baker Petrolite Production Baker Hughes Inteq Drilling Schlumberger Completion BJ Services A/S Completion and stimulation BJ Services Completion and stimulation Halliburton Energy Services Stimulation Baroid Drilling Fluids, Manufacturing and Services Drilling Ltd Schlumberger Cementing

TR list 2

Function Fluid loss control in organic phase fluid systems Emulsifier in organic phase fluid systems Shale stabiliser Well bore clean up fluid Fluid loss control Chemical As a fiscosifier in drilling fluids As a fiscosifier in drilling fluids Extender for cementing PH control Base oil Fluid loss Control Viscofier (foam) generator and stabiliser for the Water Based system. Breaker Component of lost circulation material Weighting agent (brine) For brine phase in invert drilling fluids Salt for making brine ? Well control Emulsifier for water in oil and organic liquids Emulsifier for water in oil organic liquids. Viscosifier for oil based and synthetic muds Solvent PH control PH control ? PH control in completion and workover fluids As a weighting agent in drilling fluids Flexibility additive Flexibility additive ? ? Turbulence inducer (thinner) for cement slurries ? Cold Flow Improver ? Dispersant Corrosion Inhibitor Corrosion inhibitor Filtration control agent for seapage loss Iron control agent for completion/workover Acid corrosion inhibitor Corrosion inhibitor Crosslinker Base oil Cementing mixture

Existing N N N N N Y N Y Y Y Y N Y Y N N N Y Y Y N N Y Y Y Y Y Y Y Y Y Y N Y Y Y Y Y N Y Y Y N Y Y N Y

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TR number 03/TR/2/ 00228 03/TR/2/ 00229 03/TR/2/ 00230 03/TR/2/ 00231 03/TR/2/ 00232 03/TR/2/ 00233 03/TR/2/ 00234 03/TR/2/ 00235 03/TR/2/ 00236 03/TR/2/ 00237 03/TR/2/ 00238 03/TR/2/ 00239 03/TR/2/ 00240 03/TR/2/ 00241 03/TR/2/ 00242 03/TR/2/ 00243 03/TR/2/ 00244 03/TR/2/ 00245 03/TR/2/ 00246 03/TR/2/ 00247 03/TR/2/ 00248 03/TR/2/ 00249 03/TR/2/ 00250 03/TR/2/ 00251 03/TR/2/ 00252 03/TR/2/ 00253 03/TR/2/ 00254 03/TR/2/ 00255 03/TR/2/ 00256 03/TR/2/ 00257 03/TR/2/ 00258 03/TR/2/ 00259 03/TR/2/ 00260 03/TR/2/ 00261 03/TR/2/ 00262 03/TR/2/ 00263 03/TR/2/ 00264 03/TR/2/ 00265 03/TR/2/ 00266 03/TR/2/ 00267 03/TR/2/ 00268 03/TR/2/ 00269 03/TR/2/ 00270 03/TR/2/ 00271 03/TR/2/ 00272 03/TR/2/ 00273 03/TR/2/ 00274

Trade name Supplier/Manufacturer Application Function Class G Cement (Dyckerhoff Oilwell Cebo ClassHolland G Cement) BV Cementing Base product for we…..enting Clay Master-5C BJ Services International b.v. Completion and stimulation Well stimulation chemical CLE-2231 OWT Services BV Utilities Cleaning Cleaner HD 2 SP TriStar Industries Nederland BV Utilities, Other (state): rigwash Detergent / cleaning fluid Cleardrill N Baker Hughes Inteq Drilling Density provision in the form of a brine Cleardye Champion Servo Production Dye Cleartron F240 Champion Servo Production Deoiler Cleartron MRD 208 SW Champion Servo Production Deoiler CM HEC (all grades) M-I Drilling Fluids BV Drilling Viscosifier CMC Baroid Drilling Fluids Drilling Filtration Control Agent CMC (All grades) Baroid Drilling Fluids, Halliburton Energy Services Drilling Fluid loss control CMC (All grades) M-I Drilling Fluids BV Drilling Fluid loss control CMO 568 Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd Lubricating agent in synthetic fluid systems Condet E Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd Detergent Conqor 303A M-I Drilling Fluids BV Drilling Corrosion inhibitor for completion / Workover Fluids Conqor 404 M-I Drilling Fluids BV Drilling Corrosion inhibitor Core Lab T401 Core Laboratories (UK) Ltd Production Chemical tracer for reservoir use Core Lab T501 Core Laboratories (UK) Ltd Production Chemical tracer for reservoir use Corrosion Inhibitor A259 Schlumberger Completion Other completion/workover (corrosion inhibitor) Corrtreat 709 Clairiant Oil Services Production Corrosion inhibitor Cortron CK 368 Champion Servo Production Corrosion Inhibitor Cortron CK 959 Champion Servo Production Corrosion inhibitor Cortron OS2 Champion Servo Production Oxygen Scavenger CRO80638 Baker Petrolite Production Corrosion inhibitor CRO83605 Baker Petrolite Production Corrosion inhibitor CRW80666 Baker Petrolite Production Corrosion inhibitor CRW80798 Baker Petrolite Production Corrosion inhibitor CRW83133 Baker Petrolite Production Corrosion inhibitor CRW85208 Baker Petrolite Production Corrosion inhibitor D096 Cement Additive Schlumberger Cementing Lost circulation material for cementing D-4GB BJ Services International bv Completion and stimulation Surfactant DCP 208 M-I International BV Drilling Other Chemicals (Clay swelling inhibitor) D-Crude-1 Halliburton Energy Services Completion Maintenance and Cleaining Defoam Green M-I Drilling Fluids BV Drilling and completion Defoamer Defoam NS M-I Drilling Fluids BV Drilling Defoamer Defoamer AF 340 Champion Servo Production Antifoam Defoamer AF119M Champion Servo Production Antifoam Defoamer AF400 Champion Servo Production Antifoam Dextrid E Baroid Drilling Fluids Drilling Fluid loss additive Dextrid LTE Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd Fluid loss control agent Di Balance (version 1) M-I International BV Drilling PH control Di Boost (version 1) M-I International BV Drilling Other Chemex, viscosity control DMO 80968 Baker Petrolite Production Demulsifier DMO 83306 Baker Petrolite Production Demulsifier DMO 86489 Baker Petrolite Production Demulsifier DMO 86600 Baker Petrolite Production Demulsifier Dolofil D100, Dolofil D45L Baker Hughes Inteq Drilling Weighting/bridging agent

Temporary Registration Numbers

TR list 2

Existing Y Y Y Y Y Y N N N Y Y N Y Y Y Y N N Y Y N N N Y Y Y Y Y Y Y Y Y N N Y Y Y N Y Y N N Y Y Y Y N

Page 9 of 19

TR number 03/TR/2/ 00275 03/TR/2/ 00276 03/TR/2/ 00277 03/TR/2/ 00278 03/TR/2/ 00279 03/TR/2/ 00280 03/TR/2/ 00281 03/TR/2/ 00282 03/TR/2/ 00283 03/TR/2/ 00284 03/TR/2/ 00285 03/TR/2/ 00286 03/TR/2/ 00287 03/TR/2/ 00288 03/TR/2/ 00289 03/TR/2/ 00290 03/TR/2/ 00291 03/TR/2/ 00292 03/TR/2/ 00293 03/TR/2/ 00294 03/TR/2/ 00295 03/TR/2/ 00296 03/TR/2/ 00297 03/TR/2/ 00298 03/TR/2/ 00299 03/TR/2/ 00300 03/TR/2/ 00301 03/TR/2/ 00302 03/TR/2/ 00303 03/TR/2/ 00304 03/TR/2/ 00305 03/TR/2/ 00306 03/TR/2/ 00307 03/TR/2/ 00308 03/TR/2/ 00309 03/TR/2/ 00310 03/TR/2/ 00311 03/TR/2/ 00312 03/TR/2/ 00313 03/TR/2/ 00314 03/TR/2/ 00315 03/TR/2/ 00316 03/TR/2/ 00317 03/TR/2/ 00318 03/TR/2/ 00319 03/TR/2/ 00320 03/TR/2/ 00321

Trade name Supplier/Manufacturer Application Dolomite M-I International BV Drilling Drill Thin (version 1) M-I International BV Drilling Drilling Starch M-I Drilling Fluids BV Drilling Drillzan D M-I Drilling Fluids BV Drilling Dril-N-Slide Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services Ltd) Drilplex M-I Drilling Fluids BV Drilling Driltreat Baroid Drilling Fluids Drilling Driscall D M-I Drilling Fluids BV Drilling Drispac (all grades) M-I Drilling Fluids BV Drilling Drispac (All grades) Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services and Completion Ltd Drispac Plus Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services and Completion Ltd DSGA (version1) BJ Services Completion Dulon F10 Dulon International Rig cleaning Duo-Vis M-I Drilling Fluids BV Drilling Duo-Vis NS M-I Drilling Fluids BV Drilling and completion Duratone E Baroid Driling Fluids , Halliburton Manufacturing Drilling ans Services Ltd D-WAX ML 3307 Baker Perfomance Chemicals Production Dyno CC-5119 Dyno Oil Field Chemicals Production Dyno KI-352 Dyno Oil Field Chemicals Production Dyno Kl-384 MI Production Chemicals Production Dyno MS-400 MI Production Chemicals Other (state) Dyno WT-31 Dyno Oil Field Chemicals Production Dynoclean CC5105 MI Production Chemicals Production EC1231A Nalco/Exxon Energy Chemicals Limited Production EC1443A Nalco/Exxon Energy Chemicals Limited Production EC6036A Nalco/Exxon Energy Chemicals Limited Production EC6111A Nalco/Exxon Energy Chemicals Limited Production EC6176A Nalco/Exxon Energy Chemicals Limited Stimulation EC6191A Nalco/Exxon Energy Chemicals Limited Production EC6199A ONDEO Nalco Water injection system EC9163A Nalco/Exxon Energy Chemicals Limited Production EC9242A Nalco/Exxon Energy Chemicals Limited Production EC9357A Ondeo Nalco Ltd Production ELS 325 AG (version1) Weatherford Drilling EMI-742 (version 1) M-I Norge AS Drilling Emulsotron CC 3344 Champion Servo Production Enviromul Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd Erifon HD603 HP MacDermid Canning Limited Drilling ERIFON HD603 HP (1% dilution) MacDermid plc Drilling Escaid 120 (version1) M-I International BV Drilling Ethylene glycol (refinery Shell Chemicals) Succes Oil- and Gasfield Services BV ? EZ CORE Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd EZ MUD DP Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd EZ MUD RDP Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd EZ MUL NT Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd EZ MUL NT NS Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services ltd) EZEFLO* F103 SURFACTANT Dowell Schlumberger Completion

Temporary Registration Numbers

TR list 2

Function ? Other chemicals, thinner Viscosifier/Fluid loss reducer Viscosifier Lubricant in water base muds Viscosifier Oil wetting agent Viscosifier Viscosifier Viscosifier and filtration reducer for WBM drilling and completion fluids Visdosifier and filtration reducer Viscosifier Cleaner and degreaser for oil rigs Viscosifier Viscosifier Fluid loss control Wax inhibitor Cleaning agent Corrosion inhibitor Corrosion inhibitor Tracer dye Flocculant Cleaning agent Combined scale/corrosion inhibitor Corrosion inhibitor Coagulant/deoiler Biocide The chemical is used as a polyelectrolyte for sea water injection systems Reverse demulsifier / deoiler Biocide Antifoam Defoamer Defoamer Dope Drilling Lubricants Demulsifier OPF Oil based Drilling Fluid BOP control fluid ? Base Oil ? Passive emulsifier Shale stabiliser Shale stabiliser Emulsifier Emulsifier in invert drilling systems Completion / workover (Improves cleanup and fluid wettability)

Existing Y N Y Y Y N Y N N Y Y Y N Y N Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y N Y Y Y Y Y Y Y Y Y Y N Y

Page 10 of 19

TR number 03/TR/2/ 00322 03/TR/2/ 00323 03/TR/2/ 00324 03/TR/2/ 00325 03/TR/2/ 00326 03/TR/2/ 00327 03/TR/2/ 00328 03/TR/2/ 00329 03/TR/2/ 00330 03/TR/2/ 00331 03/TR/2/ 00332 03/TR/2/ 00333 03/TR/2/ 00334 03/TR/2/ 00335 03/TR/2/ 00336 03/TR/2/ 00337 03/TR/2/ 00338 03/TR/2/ 00339 03/TR/2/ 00340 03/TR/2/ 00341 03/TR/2/ 00342 03/TR/2/ 00343 03/TR/2/ 00344 03/TR/2/ 00345 03/TR/2/ 00346 03/TR/2/ 00347 03/TR/2/ 00348 03/TR/2/ 00349 03/TR/2/ 00350 03/TR/2/ 00351 03/TR/2/ 00352 03/TR/2/ 00353 03/TR/2/ 00354 03/TR/2/ 00355 03/TR/2/ 00356 03/TR/2/ 00357 03/TR/2/ 00358 03/TR/2/ 00359 03/TR/2/ 00360 03/TR/2/ 00361 03/TR/2/ 00362 03/TR/2/ 00363 03/TR/2/ 00364 03/TR/2/ 00365 03/TR/2/ 00366 03/TR/2/ 00367 03/TR/2/ 00368

Trade name FDP W658 FDP-C601 FDP-C647-02 FDP-C647L-02 + Starcide FE-1 FE-1A FE-2 Ferrotrol 300 (version 1) Ferrotrol 800L (version 1) Ferrotrol-800 Filter chek FLAC*D112 Fluid-Loss Additive Flexstone Flocgel Flocgel (all grades) Flocgel LV Floplex Flotrol Flovis Flovis (all grades) Flowzan Flowzan Flowzan Flowzan Flowzan Flowzan Biopolymer Fluorescein dye FMW25 Foambrak MEP 521 Fordacal (all grades) FP-16LG (version 1) FP-9L (version1) FX1397 G Seal Gasblok (*) D600 Additive Gasblok * D135 Stabilizer Gasblok*LT D500 GBW-30 Breaker GBW-5 (version 1) Gelling Agent J164 Geltone II GEM CP Gilsonite Glassbeads Glydril MC Go Devil II Grit

Temporary Registration Numbers

Supplier/Manufacturer Application Function Halliburton Energy Services Stimulation Permeability modifier Halliburton Energy Services Cementing ? Halliburton Energy Services Cementing Fluid loss control Halliburton Energy Services Cementing Fluid loss control Halliburton Energy Services Stimulation ? Halliburton Energy Services Stimulation ? Halliburton Energy Services Stimulation Well stimulation chemical BJ Services International b.v. Completion and stimulation Well Stimulation Chemical BJ Services International b.v. Completion and stimulation Well stimulation chemical BJ Services Completion and stimulation Breaker catalyst Baroid Drilling Fluids Drilling Fluid loss additive Schlumberger Cementing Fluid loss additive Schlumberger Cementing Oil well cement blend M-I International BV Drilling ? M-I Drilling Fluids BV Drilling Viscosifier / Fluid loss reducer Baroid Drilling Fluids Drilling Fluid loss additive M-I Drilling Fluids BV Drilling As fluid loss reducer in water based drilling fluids M-I Drilling Fluids BV Drilling Viscosifier M-I Drilling Fluids BV Drilling Completion fluid M-I Drilling Fluids BV Drilling and completion Viscosifier Drilling Specialties Co Drilling Viscosifier Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services and completion Ltd. Viscosifier M-I Drilling Fluids BV Drilling and completion Viscosifier Cebo Holland BV Drilling Rheology control Baker Hughes Inteq Drilling Viscosifier for water-based muds M-I Drilling Fluids Drilling ? Champion Servo Hydrotesting Hydrotesting Baker Petrolite Production Foaming agent for unloading low pressure gas wells Baker Hughes Inteq ? Antifoam Baker Hughes Inteq Drilling Weight and plugging material BJ Services International Completing and Stimulation Defoamer BJ Services Completion Defoamer Nalco/Exxon Energy Chemicals Limited Production Demulsifier M-I Drilling fluids Holland Drilling Lost circulation Materials Schlumberger Dowell Cementing Prevents gas migration through cement column Schlumberger Dowell Cementing Fluid loss additive Schlumberger Cementing Gas control agent Halliburton Energy Services Stimulation ? BJ Services International bv Completion and stimulation Miscellaneous Schlumberger Completion Gelling agent in completion fluids Baroid Drilling Fluids Drilling Suspension agent Baroid Drilling Fluids Drilling Shale stabilizer Baker Hughes Inteq Drilling Fluid loss reducer for oil based muds M-I Drilling Fluids BV Drilling Torque reducer for drilling fluids M-I Drilling Fluids Drilling As a lubricant in water based drilling fluids M-I Drilling Fluids UK Ltd Drilling Viscosifier for the Water based mud system, called Aphron ICS Cebo Holland BV Drilling Lost circulation material

TR list 2

Existing Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y N N N Y N Y Y N Y Y Y N Y N N Y Y Y Y Y Y Y N Y Y N

Page 11 of 19

TR number 03/TR/2/ 00369 03/TR/2/ 00370 03/TR/2/ 00371 03/TR/2/ 00372 03/TR/2/ 00373 03/TR/2/ 00374 03/TR/2/ 00375 03/TR/2/ 00376 03/TR/2/ 00377 03/TR/2/ 00378 03/TR/2/ 00379 03/TR/2/ 00380 03/TR/2/ 00381 03/TR/2/ 00382 03/TR/2/ 00383 03/TR/2/ 00384 03/TR/2/ 00385 03/TR/2/ 00386 03/TR/2/ 00387 03/TR/2/ 00388 03/TR/2/ 00389 03/TR/2/ 00390 03/TR/2/ 00391 03/TR/2/ 00392 03/TR/2/ 00393 03/TR/2/ 00394 03/TR/2/ 00395 03/TR/2/ 00396 03/TR/2/ 00397 03/TR/2/ 00398 03/TR/2/ 00399 03/TR/2/ 00400 03/TR/2/ 00401 03/TR/2/ 00402 03/TR/2/ 00403 03/TR/2/ 00404 03/TR/2/ 00405 03/TR/2/ 00406 03/TR/2/ 00407 03/TR/2/ 00408 03/TR/2/ 00409 03/TR/2/ 00410 03/TR/2/ 00411 03/TR/2/ 00412 03/TR/2/ 00413 03/TR/2/ 00414 03/TR/2/ 00415

Trade name Supplier/Manufacturer Application Guar Gum Baroid Drilling Fluids Drilling Guar Gum M-I Drilling Fluids BV Drilling Gypsum Baroid Drilling Fluids Drilling Gyptron SA 960 Champion Servo Production HAI-OS Halliburton Energy Services Stimulation Halad (R) 413L Halliburton Energy Services Cementing Halad 200 Cement Additive Halliburton Energy Services Cementing HCL Halliburton Energy Services Stimulation HEC (All grades) M-I Drilling Fluids Drilling and completion Hibtrol (version 1) M-I International BV Drilling High Perm CRB (Version 1) BJ Services International bv Completion and stimulation High Temperature Gel Stabilizer J353 Schlumberger Dowell Stimulation HMR Cement Halliburton Energy Services Cementing HR-25 Halliburton Energy Services Cementing HR-4 Halliburton Energy Services Cementing HR-4L Additive - 5 gallons Halliburton Energy Services Cementing HT Breaker Halliburton Energy Services Stimulation Hy Temp I (Version 1) BJ Services International b.v. Completion and stimulation Hy Temp O BJ Services International Completion and stimulation Hydrochloric Acid 15% H15 Schlumberger Completion Hydrochloric Acid 28% H28 Schlumberger Completion Hydroxyethyl Cellulose (HEC) (version1) BJ Services International b.v. Completion and stimulation Hytreat 5057 Clariant Oil Services Production Hytreat 5058 Clariant Oil Services Production Hytreat 548 Clariant Oil Services Production Hytreat 55-032 TR Oil Services Ltd ? Hytreat 55-032 Clariant Oil Services Production Hytreat 55-054 Clariant Oil Services Production Hytreat A560 Clariant Oil Services Production Ilmenite Weighting Agent D18 Schlumberger Cementing Inhibitor Aid A201 Schlumberger Completion Invermul NT Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd Ironite Sponge Baker Hughes Inteq Drilling Ironite Sponge Baroid Drilling Fluids Drilling Ironite Sponge M-I Drilling Fluids BV Drilling Ironite Sponge Cebo Drilling Isopropanol Halliburton Energy Services Completion K-35 Halliburton Energy Services Stimulation K-490 Baker Petrolite Production Kem-Seal Plus Baker Hughes Inteq Drilling Kopluss LL M-I Drilling Fluids BV Drilling KW 1665 Baker Petrolite Production KW-2930 Baker Petrolite Production Kwick-seal (all grades) MI Drilling Fluids B.V. Drilling LD-8(v) Baker Huges Inteq Drilling Limestone Grit Baker Hughes Inteq Drilling Liquid Anti-Settling Agent D162 Schlumberger Cementing

Temporary Registration Numbers

TR list 2

Function Viscosifier Viscosifier Shale inhibitor Scale inhibitor Corrosion inhibitor ? Fluid loss control ? Viscosifier Viscosifier, Fluid loss control Breaker Stabilizing the Widefrac fluids at temperature greater than 200'F ? ? ? ? Gel breaker Well stimulation chemical Corrosion inhibitor intensifier Completion/Workover Completion/Workover Viscosifier Gas hydrate inhibitor Gas Hydrate Inhibitor Gas hydrate inhibitor ? Gas Hydrate inhibitor Hydrate inhibitor / corrosion inhibitor Gas Hydrate inhibitor Weighting agent Other completion / workover (Corrosioninhibitor) Emulsifier for OPF's Hydrogen sulphide scavenger Hydrogen Sulphide Scavenger Hydrogen Sulphide Scavenger As an H2S scavenger in drilling fluids ? Well Stimulation chemical Oxygen Scavenger Shale inhibitor for water-based muds Descaler Corrosion inhibitor Corrosion inhibitor Lost circulation material Defaomer for waterbased muds Weight and plugging material Dispersant

Existing Y Y Y Y Y Y N Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y N N Y Y Y N Y Y Y N Y Y Y N Y Y Y Y N Y Y Y Y Y Y

Page 12 of 19

TR number 03/TR/2/ 00416 03/TR/2/ 00417 03/TR/2/ 00418 03/TR/2/ 00419 03/TR/2/ 00420 03/TR/2/ 00421 03/TR/2/ 00422 03/TR/2/ 00423 03/TR/2/ 00424 03/TR/2/ 00425 03/TR/2/ 00426 03/TR/2/ 00427 03/TR/2/ 00428 03/TR/2/ 00429 03/TR/2/ 00430 03/TR/2/ 00431 03/TR/2/ 00432 03/TR/2/ 00433 03/TR/2/ 00434 03/TR/2/ 00435 03/TR/2/ 00436 03/TR/2/ 00437 03/TR/2/ 00438 03/TR/2/ 00439 03/TR/2/ 00440 03/TR/2/ 00441 03/TR/2/ 00442 03/TR/2/ 00443 03/TR/2/ 00444 03/TR/2/ 00445 03/TR/2/ 00446 03/TR/2/ 00447 03/TR/2/ 00448 03/TR/2/ 00449 03/TR/2/ 00450 03/TR/2/ 00451 03/TR/2/ 00452 03/TR/2/ 00453 03/TR/2/ 00454 03/TR/2/ 00455 03/TR/2/ 00456 03/TR/2/ 00457 03/TR/2/ 00458 03/TR/2/ 00459 03/TR/2/ 00460 03/TR/2/ 00461 03/TR/2/ 00462

Trade name Supplier/Manufacturer Liquid Cement M-I Drilling Fluids BV Liquid Retarder Schlumberger Liquid Retarder D81 Schlumberger Low Temperature Liquid Dispersant Schlumberger D145A Lube 167 M-I International B.V.Holland Lube 622 Baker Hughes Inteq Lube XLS M-I Drilling Fluid UK Ltd Magnacide 575 (version 1) BJ Services Interanational Magnafloc 216 Ciba Specialty Chemicals Magnesium Chloride Brine M-I Drilling Fluids BV Magnesium Oxide (version 1) M-I Drilling Fluids BV Malleus STC 1 Shell international Petroleum Company Limited Malleus STC 2 Shell international Petroleum Company Limited MC FLA HV M-I Drilling Fluids BV MC PAC TLE M-I Drilling Fluids BV MC XAN ZN M-I Drilling Fluids BV MEG ( Mono Ethylene Glycol) Champion Servo Methanol Methanor v.o.f. Methanol Baker Petrolite Methanol Succes Oil and Gasfield Services bv Methanol K46 Schlumberger M-I Cide M-I drilling Fluids BV M-I Gel M-I Drilling Fluids BV M-I Gel Supreme M-I Drilling Fluids BV M-I Pac All Grades (version 1) M-I International BV Microblock Halliburton Energy Services Microbond M Halliburton Energy Services Microcit 120 M (version 1) Vest Hygiene A.S. Microcit 120M (version 2) Vest Hygiene A.S Micro-Ribbon D187 Schlumberger Mikhart (all grades) Cebo Holland BV Mikhart (all grades) M-I Drilling Fluids BV Milben (Bentonite) Baker Huges Inteq Milbio Sea 98 Baker Huges Inteq Milcarb Baker Hughes Inteq Milclean E Baker Hughes Inteq Milgard FE Baker Huges Inteq Mill-Seal (all grades) Baker Huges Inteq MilMica (all grades) Baker Hughes Inteq Milpac (all grades) Baker Hughes Inteq Milplug Baker Hughes Inteq Mil-seal (all grades) Baker hughes Inteq Milstarch Baker Huges Inteq MIX II (all grades) M-I Drilling Fluids BV MMR-2 (version 1) BJ Services International b.v. Mudpush (*) XL Laminar Spacer D149 Dowell Schlumberger Mudpush* XT Fresh water turbulent spacer Schlumberger D147 Dowell

Temporary Registration Numbers

Application Drilling Cementing Cementing Cementing Drilling Drilling Drilling Completion and stimulation ? Drilling Drilling Drilling Drilling Drilling Drilling Drilling Production ? Utilities Production Completion Drilling Drilling Drilling Drilling Cementing Cementing Other chemicals Other Chemicals Cementing Drilling Drilling Drilling Drilling Drilling Drilling and Rig washing Drilling Drilling Drilling Drilling Drilling Drilling Drilling Drilling Completion and stimulation Cementing Cementing

TR list 2

Function Descaler Retarder Cement retarder for low to moderate temperatures Dispersant ? Lubricant for water-based mud Lubricant for water based muds Biocides ? For acidity control in drilling fluids For acidity control in Drilling Fluids Pipe thread (Dope) compound Pipe thread (Dope) compound Viscosifier / Fluid loss reducer Fluid Loss Control Viscosifier Other ? Dehydration ? Solvent in completion and workover Biocide to prevent bacterial growth in WBM drilling and completion fluids. As a viscosifier in drilling fluids As a viscosifier in drilling fluids Viscosifier ? ? Cleaning agent Cleaning agent Mechanical properties improvement of set cement Non damaging weighting agent in drilling fluids As a loss circulation material Viscosifier for water-based mud Broad-spectrum biocide Weight and plugging material Detergent Hydrogen sulphide scavenger Lost Circulation Material Lost circulation material Rheology and/or fluid loss control Lost circulation material Lost circulation material Fluids loss additive for water based mud Lost circulation material Well stimulation chemical Spacer Spacer for cement slurries

Existing N N Y Y N Y Y Y N N N Y Y N N N Y N Y N Y N Y N Y Y Y N N Y N Y Y Y Y Y Y Y Y Y Y Y Y N Y Y Y

Page 13 of 19

TR number 03/TR/2/ 00463 03/TR/2/ 00464 03/TR/2/ 00465 03/TR/2/ 00466 03/TR/2/ 00467 03/TR/2/ 00468 03/TR/2/ 00469 03/TR/2/ 00470 03/TR/2/ 00471 03/TR/2/ 00472 03/TR/2/ 00473 03/TR/2/ 00474 03/TR/2/ 00475 03/TR/2/ 00476 03/TR/2/ 00477 03/TR/2/ 00478 03/TR/2/ 00479 03/TR/2/ 00480 03/TR/2/ 00481 03/TR/2/ 00482 03/TR/2/ 00483 03/TR/2/ 00484 03/TR/2/ 00485 03/TR/2/ 00486 03/TR/2/ 00487 03/TR/2/ 00488 03/TR/2/ 00489 03/TR/2/ 00490 03/TR/2/ 00491 03/TR/2/ 00492 03/TR/2/ 00493 03/TR/2/ 00494 03/TR/2/ 00495 03/TR/2/ 00496 03/TR/2/ 00497 03/TR/2/ 00498 03/TR/2/ 00499 03/TR/2/ 00500 03/TR/2/ 00501 03/TR/2/ 00502 03/TR/2/ 00503 03/TR/2/ 00504 03/TR/2/ 00505 03/TR/2/ 00506 03/TR/2/ 00507 03/TR/2/ 00508 03/TR/2/ 00509

Trade name Supplier/Manufacturer Application Multi-temperature Cement Retarder D161 Schlumberger Dowell Cementing Musol Solvent Halliburton Energy Services Cementing N Dril HT Plus Baroid Drilling Fluids Drilling and completion N Vis P Plus Baroid Drilling Fluids Drilling and Completion Nalcool 2000 Ondeo Nalco Ltd ? Newdrill plus Baker Huges Inteq Drilling NF-5 Halliburton Energy Services Cementing NF-6 Baroid Drilling Fluids Drilling and Completion No Foam M-I Drilling Fluids Drilling Nutplug (All grades) M-I International BV Drilling O-3670R Champion Servo Other: Hydrotest of pipeline OCMA Bentonite Baroid Drilling OFRIC C-798 Baker Petrolite Production OM Seal M-I Drilling Fluids BV Drilling OMC 2 Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd. OMC 3 Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd. OMC 42 Baroid Drilling Fluids Drilling OM-Seal Baker Huges Inteq Drilling OS1-L M-I Drilling Fluids BV Drilling OS2 Champion Servo Production OS3 Champion Technologies Pipeline OWT-3381 OWT Services BV Production OWT-3881 OWT Services BV Production OWT-3886 OWT Services BV Production Oxygon Baroid Drilling Fluids, (Halliburton ManufacturingDrilling and Services and completion Ltd.) PAC (All grades) M-I International BV Holland Drilling PAC L Baroid Drilling Fluids Drilling PAC R Baroid Drilling Fluids Drilling PAO82237 Baker Petrolite Production PBS Plug TBC Brinadd Drilling PBS Plug M-I Drilling Fluids Drilling PBS Plug 500 M-I Drilling Fluids BV Drilling PBS Plug Activator M-I Drilling Fluids BV Drilling PBS Plug Retarder M-I Drilling Fluids BV Drilling PEN 5M Halliburton Energy services Cementing PEN-11 Halliburton Energy Services Cementing Penetrex NS Baker Huges Inteq Drilling Perflow 100 Baker Hughes Inteq Drilling Perflow DIF Baker Hughes Inteq Drilling Phase Treat 1510 Clariant Oil Services Production Phasetreat 1510 TR Oil Services Ltd. Production Phasetreat 6060 TR Oil Services Ltd Production Polydrill (version 1) M-I International BV Drilling Polypac (all grades) M-I Drilling Fluids BV Drilling Polyplus RD M-I Drilling Fluids Drilling Polyvis II M-I Drilling Fluids BV Drilling Potassium Acetate Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services and Completion Ltd.

Temporary Registration Numbers

TR list 2

Function Retarder ? Filtration Control Agent Viscosifier Corrosion Inhibitor shale inhibitor for water based mud ? De foaming agent As a continuous phase in an invert drilling fluid For lost circulation Biocide / Corrosion Inhibitor Viscosifier Corrosion inhibitor Fluid loss control agent Thinner for oil based muds Thinner Thinner for oil based mud Filtation control agent for seepage loss Corrosion inhibitor Oxygen Scavenger Oxygen Scavenger Stimulating oil-water separation Demulsifier Demulsifier Oxygen scavenger For weghting of drilling fluids Polymeric Viscosifier/Filtration Control Agent Polymeric Viscosifier / Filtration Control Agent Cold Flow Improver A soft setting X-link polymer to combat loss circulation As a loss circulation material Viscosifier in drilling fluids As a loss circulation material As a loss circulation material ? Surfactant in spacer Lubricant for water based mud Drill in fluid Drill in fluid Demulsifier Emulsion breaker which will seperate oil from water Demulsifier Other chemicals, fluid loss control Viscosifier Shale inhibitor As viscosifier Weighting agent, inhibition

Existing Y Y Y Y Y Y N Y N Y N Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y N Y Y N N N Y N Y Y Y Y Y Y Y Y N Y Y

Page 14 of 19

TR number 03/TR/2/ 00510 03/TR/2/ 00511 03/TR/2/ 00512 03/TR/2/ 00513 03/TR/2/ 00514 03/TR/2/ 00515 03/TR/2/ 00516 03/TR/2/ 00517 03/TR/2/ 00518 03/TR/2/ 00519 03/TR/2/ 00520 03/TR/2/ 00521 03/TR/2/ 00522 03/TR/2/ 00523 03/TR/2/ 00524 03/TR/2/ 00525 03/TR/2/ 00526 03/TR/2/ 00527 03/TR/2/ 00528 03/TR/2/ 00529 03/TR/2/ 00530 03/TR/2/ 00531 03/TR/2/ 00532 03/TR/2/ 00533 03/TR/2/ 00534 03/TR/2/ 00535 03/TR/2/ 00536 03/TR/2/ 00537 03/TR/2/ 00538 03/TR/2/ 00539 03/TR/2/ 00540 03/TR/2/ 00541 03/TR/2/ 00542 03/TR/2/ 00543 03/TR/2/ 00544 03/TR/2/ 00545 03/TR/2/ 00546 03/TR/2/ 00547 03/TR/2/ 00548 03/TR/2/ 00549 03/TR/2/ 00550 03/TR/2/ 00551 03/TR/2/ 00552 03/TR/2/ 00553 03/TR/2/ 00554 03/TR/2/ 00555 03/TR/2/ 00556

Trade name Supplier/Manufacturer Application Function Potassium Carbonate Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd. Inhibitor /Bridging agent Potassium Chloride Brine Baker Hughes Inteq Drilling Salinity Inhibition Potassium Formate Baker Hughes inteq Drilling and completion salt for making brine Potassium Formate (version 1) M-I International BV Drilling Shale inhibitors Potassium Formate Brine (version 1)M-I International BV Drilling and completion Shale inhibitors Potassium Hydroxide Baker Hughes Inteq Drilling PH Control Potassium Hydroxide Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd. Alkalinity control Potassium Hydroxide CEBO Holland BV Drilling PH control and shale inhibitor Potassium Hydroxide M-I International BV Holland Drilling ? Potassium Sulphate Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd Drilling fluid Pozmix 8000 Halliburton energy Services Cementing ? Pozzocemoil Cebo Holland BV Cementing Well cementing PSA-1 (version 1) BJ Services International bv Completion and stimulation Stabilizing agent Radiagreen EBL Oleon Drilling Lubricant additive for water basea drilling fluids (or spotting fluid additive) Radiagreen EBO Oleon Drilling Lubricant added to water based muds Radiagreen EME Salt Oleon BV Drilling Lubricant additive added to water based muds Radiagreen SL Oleon NV Drilling Drilling lubricant Retarder D28 Schlumberger Cementing Retarder RFC Agent D111 Schlumberger Cementing Imparts thixotropic properties to Cement slurry Rig Wash Liquid Mild TriStar Industries Nederland BV ? ? Rigger-2 Apex Industrial Chemicals Ltd. Completion Deck, Bulkhead & Equipment Cleaner RM-63 Baroid Drilling Fluids Drilling Rheology modifier / oil base muds R-MC G-21 (version 1) Tech-Trade A/S Other chemicals Cleaning agent RP-6489 Baker Petrolite Production Demulsifier RX-03 Baroid, a division of Dresser Oilfield Services BV? ? RX-05BD M-I Drilling Fluids BV Completion (pipe dope) Dissolution of pipe dope deposits RX-07 Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services and completion Ltd. Well cleanup Ryzolin® Economic Hijmeco Trading BV Utilities, Rigcleaning / helicopterdeck General Cleaner / General…. and Degreaser Safe Carb (all grades) M-I Drilling Fluids BV Drilling For brine phase in invert Drilling Fluids, LCM Safe Cide M-I Drilling Fluids BV Drilling and completion Biocide to prevent bacterial growth in WBM drilling and completion fluids. Safe Cor HT M-I Drilling Fluids BV Drilling and completion Corrosion inhibitor for completion / workover fluids Safe Scav CA M-I Drilling Fluids BV Drilling and completion Oxygen scavenger Safe Scav HS M-I Drilling Fluids BV Drilling Hydrogen Sulphide scavenger for drilling fluids Safe Surf WN M-I Drilling Fluids BV Drilling and completion Cleaner/Detergent Safe Vis E M-I Drilling Fluids BV Drilling As a viscosifier in water based drilling fluids Safe Vis LE M-I Drilling Fluids BV Drilling and completion As viscosifier and fluid loss control SafeCor M-I Drilling Fluids BV Drilling Corrosion inhibitor for completion/workover fluids Safe-D-Starch Halliburton Energy services Completion enzyme breaker Safe-Scav NA M-I Drilling Fluids Drilling Corrosiuon inhibitor Safe-Solve OE M-I Drilling Fluids BV Drilling Dewaxer and cleaner for casings etc. Renovation of pipework etc. Safe-Surf E M-I Drilling Fluids Drilling Cleaner for casings after drilling and prior to bringing the well on-stream SALTBOND* II Additive D80A Schlumberger Cementing Mix Water Sand (all grades) BJ Services Completion Stimulation Sand (all grades) (version 1) BJ Services International bv Completion and stimulation Miscellanious Sand Seal (all grades) M-I Drilling Fluids BV Drilling Lost circulation material SANDWEDGE NT Halliburton Energy services Stimulation Sand Control SAPP Baroid Drilling Fluids Drilling Thinner

Temporary Registration Numbers

TR list 2

Existing Y N Y N N N Y N N Y N N Y Y Y Y Y Y Y Y Y Y Y Y N N Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y

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TR number 03/TR/2/ 00557 03/TR/2/ 00558 03/TR/2/ 00559 03/TR/2/ 00560 03/TR/2/ 00561 03/TR/2/ 00562 03/TR/2/ 00563 03/TR/2/ 00564 03/TR/2/ 00565 03/TR/2/ 00566 03/TR/2/ 00567 03/TR/2/ 00568 03/TR/2/ 00569 03/TR/2/ 00570 03/TR/2/ 00571 03/TR/2/ 00572 03/TR/2/ 00573 03/TR/2/ 00574 03/TR/2/ 00575 03/TR/2/ 00576 03/TR/2/ 00577 03/TR/2/ 00578 03/TR/2/ 00579 03/TR/2/ 00580 03/TR/2/ 00581 03/TR/2/ 00582 03/TR/2/ 00583 03/TR/2/ 00584 03/TR/2/ 00585 03/TR/2/ 00586 03/TR/2/ 00587 03/TR/2/ 00588 03/TR/2/ 00589 03/TR/2/ 00590 03/TR/2/ 00591 03/TR/2/ 00592 03/TR/2/ 00593 03/TR/2/ 00594 03/TR/2/ 00595 03/TR/2/ 00596 03/TR/2/ 00597 03/TR/2/ 00598 03/TR/2/ 00599 03/TR/2/ 00600 03/TR/2/ 00601 03/TR/2/ 00602 03/TR/2/ 00603

Trade name SAPP SCA-130 SCR-100 SCW82555 SCW82628 Seadye SEM 8 Servo CC 3344 Servo CC 3344 Servo CD 17 Servo CK 337 Servo CK 337 C50 Servo CK 337 TC50 Servo CK 352 Servo CK 368 Servo CK 492 Servo CK 981 Servo CK 981 SERVO MRD 208 Servo MRD 208 Servo UCA 316 Servo UCA 317 Servo UCA 372 Servo UCA 602 Servo UCA 606 Siderite Sildril L (Version 1) Silicaflour M8 Silicate Additive D75 SIN-2290 SISOX 163 SISOX 163 Slurriable Guar J457A Sodium Acetate ( 15-25%) Sodium Bromide Sodium Bromide Sodium Chloride Brine Sodium Formate Brine Sodium Formate Dry Sodium Hydroxide Sodium Hypochlorite Sodium Nitrate Soltex Soluflake (all grades) Soluflake F/M/C SOURSCAV SP-2510

Temporary Registration Numbers

Supplier/Manufacturer M-I Drilling Fluids Halliburton Energy services Halliburton Energy Services Baker Petrolite Baker Petrolite TR oil services LTD Halliburton Energy services Condea Servo BV Champion Servo Champion Servo Champion Servo Champion Servo Europe BV Champion Servo Europe BV Champion Servo Europe BV Champion Servo Europe BV Champion Servo Europe BV Champion Servo Condea Champion Servo Condea Servo Bv Champion Servo Europe BV Champion Servo Servo Delden BV Champion Servo Europe BV Champion Servo Europe BV Bariod M-I International BV Cebo Holland BV Schlumberger OWT Services BV Sischem BV Smit Industrial Suppliers BV Schlumberger Epenhuysen Chemie NV M-I Drilling Fluids BV Baroid Drilling Fluids Baker Hughes Inteq M-I Drilling Fluids BV M-I Drilling Fluids BV Baroid Drilling Fluids Champion Servo M-I Drilling Fluids BV M-I Drilling Fluids BV Baker Hughes Inteq Baker Huges Inteq Bariod Baker Petrolite

Application Drilling Stimulation Cementing Production Production Production Cementing Production Production Production Production Production Production Production Production Production Production Production Production ? Production Production ? Production Production Drilling Drilling Cementing Cementing Production Production Production Completion Production Completion Drilling and completion Drilling Drilling and completion Drilling Drilling Production Drilling Drilling Drilling Drilling Drilling / Completion Utilities

TR list 2

Function Thinner in water based fluids ? ? Scale inhibitor Scale inhibitor Tracer Dye / leak testing ? Demulsifier Demulsifier Reversed demulsifier Corrosion inhibitor Corrosion Inhibitor Corrosion Inhibitor Corrosion inhibitor Corrosion Inhibitor Corrosion inhibitor Corrosion inhibitor Corrosion inhibitor Reversed demulsifier ? Scale inhibitor Scale inhibitor ? Oxygen Scavenger Oxygen Scavenger Hydrogen sylphide scavenger Other chemicals, clay swelling inhibitor Additive for well cementing. Cement extander with sea water Scale inhibitor Oxygen Scavenger Oxygen scavenger Other completion /workover (gelling agent) Used to increase the PH of glycol Water based mud and additives Weighting agent Salinity / inhibition Brine phase Weighting agent / Brine Phase Alkalinity control Biocide Formation Tracer Shale inhibition, HTHP Control, Torque Reduction, Formation damage control Weight and plugging material Weight and plugging material Hydrogen sulphide scavenger Scale inhibitor

Existing Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y N Y Y N Y N Y Y Y Y Y Y N Y Y N N N N Y Y N Y Y Y Y

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TR number 03/TR/2/ 00604 03/TR/2/ 00605 03/TR/2/ 00606 03/TR/2/ 00607 03/TR/2/ 00608 03/TR/2/ 00609 03/TR/2/ 00610 03/TR/2/ 00611 03/TR/2/ 00612 03/TR/2/ 00613 03/TR/2/ 00614 03/TR/2/ 00615 03/TR/2/ 00616 03/TR/2/ 00617 03/TR/2/ 00618 03/TR/2/ 00619 03/TR/2/ 00620 03/TR/2/ 00621 03/TR/2/ 00622 03/TR/2/ 00623 03/TR/2/ 00624 03/TR/2/ 00625 03/TR/2/ 00626 03/TR/2/ 00627 03/TR/2/ 00628 03/TR/2/ 00629 03/TR/2/ 00630 03/TR/2/ 00631 03/TR/2/ 00632 03/TR/2/ 00633 03/TR/2/ 00634 03/TR/2/ 00635 03/TR/2/ 00636 03/TR/2/ 00637 03/TR/2/ 00638 03/TR/2/ 00639 03/TR/2/ 00640 03/TR/2/ 00641 03/TR/2/ 00642 03/TR/2/ 00643 03/TR/2/ 00644 03/TR/2/ 00645 03/TR/2/ 00646 03/TR/2/ 00647 03/TR/2/ 00648 03/TR/2/ 00649 03/TR/2/ 00650

Trade name Spacer 500E+ Spercene CF Spercene CFL Stabilizer J450 Stabilose HTL Staflo (all grades) Starcide Steelseal Sterling Beads T163 SUGAR Super Sealer Superseal (All grades) Surchlor 90 / Melpool Surdyne B140 Surdyne B140 Surdyne B140 Surfactant D191 Surfactant D607 SURFRAQ (WG-3L) Suspentone SWA SWA EH Sweep-Water TEG TEG TEG TEG TEQ-LUBE Therma Chek Therma Thin TLC-80 TORQ-TRIM 22 Torque Less Trifoam 78 Tristar Cleaner HD 2 A-LA Tristar Rig Wash Liquid Mild TROS 650 TROS TC 1000 TROSKIL 88 Tuned Spacer E+ Turbulent spacer D182 ULTRA PLUG Ultra Plug Retarder Ultra Plug Xcelerator Ultracap Ultrafree NS Ultrahib

Temporary Registration Numbers

Supplier/Manufacturer Application Halliburton Energy Services Cementing M-I International BV Holland Drilling M-I Drilling Fluids Drilling Dowell Schlumberger Stimulation Baroid Drilling Fluids, Halliburton Manufactering Drilling and Services Ltd. Cebo Holland BV Drilling Baroid Drilling Fluids Completion and drilling Baroid Drilling Fluids Drilling Schlumberger Completion Baroid Drilling Fluids, Halliburton Manufactering Drilling and Services Ltd. M-I Drilling Fluids BV Drilling M-I International BV Holland Drilling OWT Services BV Utilities M-I Drilling Fluids BV Drilling Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd. Baker Hughes inteq Drilling Schlumberger Cementing Schlumberger Cementing BAKER OIL TOOLS Stimulation/Completion Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd M-I Drilling Fluids Drilling M-I Drilling Fluids UK Ltd Drilling Baroid Drilling Fluids, Manufacturing and Services Drilling Ltd and completion Baker Petrolite Production Shell Chemical Europe BV Production Champion Servo Production Succes Oil- and Gasfield Services bv ? Baker Huges Inteq Drilling Baroid Drilling Fluids Drilling Baroid Drillling Fluids Drilling Halliburton Energy Services Stimulation Baroid Drilling Fluids, Halliburton Manufacturing Drilling and Services Ltd Baroid Drilling Fluids Drilling WB GmbH Production Tristar Industries Nederland BV ? Tristar Industries Nederland BV ? TR OIL SERVICES Ltd. Production Tr Oil Services Ltd Production\ Tr Oil Services Ltd Production Halliburton energy Services Cementing Schlumberger Cemeninting TBC-BRINADD Drilling, Completion TBC BRINADD Drilling and Completion TBC-BRONADO Drilling and Completion M-I Drilling Fluids BV Drilling M-I Drilling Fluids BV Drilling M-I Drilling Fluids BV Drilling

TR list 2

Function ? ? Thinner Stabilizer used to extend maximum temperature Fluid loss Control Rheology and fluid loss control Biocide Lost Circulation material Other Completion/ Workover (Scale removal agent) Thinner Lost circulation material Lost circulation material Biocide Base oil Base fluid Base fluid for oil based mud Surfactant in chemical washes and cement spacers Surfactant / For spacers and washes Frac pack operations Viscosifier (only used in high temperature applicationas) Wetting agent for invert drilling fluids Wetting agent for invert drilling fluids Weighting chemical Gas dehydrating Gas drying agent Other ? Lubricant Filtration control agent Thinner Diverting Material Lubricant for water based drilling muds Drilling lubricant To create Foam to overcome hydrostatic pressure of deposite water in tubes. ? ? Hydrotesting Chemical - for the testing of pipelines Oxygen Scavenger Biocide ? Spacer A soft to hard setting x-link polymer to combat lost circulation Used to delay crosslinking of a fluid loss plug Used as accellerator for a crosslinking fluid Shale dispersion inhibitor (encapsulating polymer) Lubricant Shale inhibitor

Existing Y N N Y Y N Y Y Y N N N Y Y Y N N Y Y N Y Y N Y N Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y N N N

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TR number 03/TR/2/ 00651 03/TR/2/ 00652 03/TR/2/ 00653 03/TR/2/ 00654 03/TR/2/ 00655 03/TR/2/ 00656 03/TR/2/ 00657 03/TR/2/ 00658 03/TR/2/ 00659 03/TR/2/ 00660 03/TR/2/ 00661 03/TR/2/ 00662 03/TR/2/ 00663 03/TR/2/ 00664 03/TR/2/ 00665 03/TR/2/ 00666 03/TR/2/ 00667 03/TR/2/ 00668 03/TR/2/ 00669 03/TR/2/ 00670 03/TR/2/ 00671 03/TR/2/ 00672 03/TR/2/ 00673 03/TR/2/ 00674 03/TR/2/ 00675 03/TR/2/ 00676 03/TR/2/ 00677 03/TR/2/ 00678 03/TR/2/ 00679 03/TR/2/ 00680 03/TR/2/ 00681 03/TR/2/ 00682 03/TR/2/ 00683 03/TR/2/ 00684 03/TR/2/ 00685 03/TR/2/ 00686 03/TR/2/ 00687 03/TR/2/ 00688 03/TR/2/ 00689 03/TR/2/ 00690 03/TR/2/ 00691 03/TR/2/ 00692

Trade name Supplier/Manufacturer Uniset LT D177 Schlumberger Versa Emul M-I Drilling Fluids BV Versa Mod M-I Drilling Fluids BV Versa Mod (version 1) M-I International BV Versa Surf M-I Drilling Fluids Versa Trol NS M-I Drilling Fluids BV Versgel HT - Bentone 38 M-I Drilling Fluids BV VG Plus (version 1) M-I International VG Supreme (version1) M-I Intyernational VG-Plus M-I Drilling Fluids BV Vicon NF Breaker Halliburton Energy Services Visplex II M-I Drilling Fluids W-308 Baker Hughes Inteq W-309 Baker Hughes Inteq Wall-Nut Baroid Drilling Fluids WBF-1 Apex Industrial Chemicals Ltd. WBF-2 Apex Industrial Chemicals Ltd Weighting Agent D157 (Micromax) Schlumberger Well Cleaner B115 Schlumberger Dowell WELL CLEANER RX-03 Roemex Limited WELL CLEANER RX-07 TBD Roemex Limited Wellclean M-I International BV Wellzyme A M-I Drilling Fluids BV Wellzyme AE M-I Drilling Fluids BV WG-11 Halliburton Energy Services WG-17 Halliburton Energy Service WG-26 Gelling Agent Halliburton Energy Service WW-2 Apex Industrial Chemicals Ltd WW-3 Apex Industrial Chemicals Ltd. Wyoming Bentonite Baroid Drilling Fluids Xanvis L (version 1) BJ Services International b.v. XC80102 Baker Petrolite XC82111 Baker Petrolite XCD Polymer M-I Drilling Fluids BV XG-L Baker Hughes Inteq XLW-56 (version 1) BJ Services International bv YF100HTD Crosslinker Delay Agent Schlumberger J480 Dowell Zeogel Baroid Drilling Fluids ZOK 27 Skyline Technologies BV ZOK 27 (version 2) Airworthy - ZOK International Group Ltd Zok mx (version 2) Skyline Technologies bv ZoneSeal 3000 Halliburton Energy Service

Temporary Registration Numbers

Application Cementing Drilling Drilling Drilling Drilling Drilling Drilling Drilling Drilling Drilling Stimulation and breaker for Drilling Drilling Drilling Drilling Completion Completion Cementing Drilling Completion Completion Drilling Completion and stimulation Stimulation and completion Stimulation Stimulation Stimulation Completion Completion Drilling Completion and stimulation Production Completion Drilling and completion Drilling Completion and stimulation Stimulation Drilling Production Other chemicals Production ?

TR list 2

Function Retarder Secondary emulsifier for invert drilling fluids Rheology modifier Other chemicals Primiary emulsifier for invert drilling fluids Fluid loss control As a viscosifier in drilling fluids Viscosifier Viscosifier Viscosifier in drilling fluids ?fracturing fluids Viscosifier Drill in Fluid Drilling fluid Lost circulation material Cleaner for casing, etc., after drilling and prior to brining well on-stream Other completion/workover (for down-hole clean-up) Weighting Agent Solvent Well cleaner Te remove mud deposits from downhole surfaces during well-bore clean-ups ? Filter cake breaker Filter cake breaker Well stimulation chemical ? ? Other completion / workover (for down-hol clean-up) Cleaner for casing etc., after drilling and prior to bringing well-on stream Viscosifier Viscosifier Biocide Biocide Viscosifier Viscosifier for water-based muds Viscosifier Buffer Viscosifier Cleaning agent Cleaning agent, corrosion inhibitors Cleaning agent Cementing

Existing Y Y Y Y Y Y N Y Y Y Y N N Y Y Y Y Y Y Y Y N N N Y Y Y Y Y N N Y Y Y Y Y Y Y Y Y Y Y

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TR number 03/TR/3/ 00693 03/TR/3/ 00694 03/TR/3/ 00695 03/TR/3/ 00696 03/TR/3/ 00697 03/TR/3/ 00698 03/TR/3/ 00699 03/TR/3/ 00700 03/TR/3/ 00701 03/TR/3/ 00702 03/TR/3/ 00703 03/TR/3/ 00704 03/TR/3/ 00705 03/TR/3/ 00706 03/TR/3/ 00707 03/TR/3/ 00708 03/TR/3/ 00709

Trade name AERO HFA CASTROL ANVOL CF 22 CASTROL HYSPIN AWV 32 CASTROL SRG GREASE Castrol Transaqua HT Gulf Harmony HVI Mobil DTE 13M Oceanic HW 443 Oceanic HW 540 Panolin HLP Synth SUBHYDRELF 15 TELLUS 22 TELLUS T15 TELLUS T32 UNIVIS HV13 Univis HVI 13 UNIVIS J-13

Temporary Registration Numbers

Supplier/Manufacturer Exxon CASTROL (U.K.) LTD. CASTROL (U.K.) LTD. CASTROL (U.K.) LTD. Castrol Limited Gulf Oil Nederland BV Exxonmobil Corporation MacDermid Canning Limited MacDemid Canning Limited Panolin AG TOTAL LUBRICANTS SHELL SHELL SHELL EXXONMOBIL Esso Nederland BV EXXON

Application Drilling/Production Drilling/Production Drilling/Production Drilling/Production Production Production Drilling/Production Production Production Lubrication / hydrolic fluid . Drilling/Production Drilling/Production Drilling/Production Drilling/Production Drilling/Production Production and completion Drilling/Production

TR list 3

Function Hydraulic fluid Hydraulic fluid Hydraulic fluid Hydraulic fluid Hydraulic control fluid for subsea production control system Hydraulic Oil Hydraulic fluid Subsea hydraulic control fluid Subsea hydraulic control fluid Lubrication of hydrolic components / gears / motors etc. Hydraulic fluid Hydraulic fluid Hydraulic fluid Hydraulic fluid Hydraulic fluid Hydraulic oil for ellheads and subsea safety valves Hydraulic fluid

Existing N Y N N Y N N Y Y Y N N N N N N N

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