1. Benchmark 8 Lubricants in SILDRIL System SILDRIL System Steve Smith

2. Summary Samples tested: 3 new samples & 5 previously used products. FTIR & GC/MS: general class and more specific chemistry. Tested @ AEL on HLT: metal-to-metal @ 1 & 3% v/v (75F) & 3% v/v, AHR 16 hrs @ 150F, for ∆% CoF.

3. Definitions ∆% CoF: percent reduction in coefficient of friction, a simple variance. [Cf Base Fluid – (Cf BF + Lube)] = ∆% CoF Cf Base Fluid

4. Lubricant Candidates TradenameManufacturer/ Supplier Database ClassificationComments Geolube BLHoughtonAlkanolaminesAmber Liquid DHM 07-24HoughtonHigh Molecular EstersDark Brown Liquid Geolube WBHoughtonAlkanolamidesDark Brown Liquid BW PolylubeJ.L. Seaton & Co Ltd High Molecular EstersLight-Yellow, Clear Liq. Finagreen SLOleon/ Radia Chemicals Amino Condensate, Amides & Alkanolamides Dark Amber Liquid SILDRIL EPLGumpro ChemHigh Molecular EstersDark Reddish Liquid DRIL-FREELamberti ItalyEster of Aliphatic AcidLight-Yellow, Clear Liq. FLO-LUBE IIPrecision AdditivesProprietary blend + Sulfur Dark Amber Liquid

5. Base Fluid Formulation Fluid Formulation1 Freshwater, bbls0.768 POLYPAC UL, ppb2.0 DUO VIS, ppb0.75 KCl, 8% by Wt, ppb23.4 SILDRIL, 8% by Vol, ppb42.8 Barite, ppb166.56 Mud PropertiesInitialAged Heat Aging Temp, °F 110 Heat Aging Hours >1 Static/Rolling/Silverson Silverson Mud Weight, ppg12.0 Rheo Temp, °F120 600 rpm4042 300 rpm2628 200 rpm22 100 rpm15 6 rpm55 3 rpm44 PV, cps14 YP, lb/100ft 2 1214 10 sec gel44 10 min gel44 API Filtrate, ml7.48.8 pH11.6511.62

6. Mud Properties, AHR Mud Properties Geolube BLDHM 07-24Geolube WBPolylubeFinagreen SLSildril EPL Heat Aging Temp, °F150 Heat Aging Hours16 Static/RollingRolling Mud Weight, ppg12.0 Rheo Temp, °F120 600 rpm334748394236 300 rpm24273327 23 200 rpm222023192018 100 rpm171416131412 6 rpm555444 3 rpm444333 PV, cps92015121513 YP, lb/100ft 2 15718151210 10 sec gel344433 10 min gel545544 API Filtrate, ml6.610.112.67.69.06.8 pH11.5811.611.5711.6711.5511.68

7. Check for Sulfides Picture to left was the equipment set-up used for the determination of sulfides in samples with candidate lubricants. A tygon tube was attached to valve stem and a low range Dräger tube was inserted in the other.

8. % Reduction CoF, Results

9. 3% v/v AHR @ 150F

10. Geolube BL, Results

11. Average CoF Readings