Coiled-Tubing High Pressure Jet Drilling System

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1 A Noble Drilling Corporation Subsidiary Coiled-Tubing High Pressure Jet Drilling System April 19, 2001 Dr. William C. Maurer TT

2 Exxon High Pressure Drill Rig HP Pump HP Rotary Hose HP Swivel HP Seal HP Line High Strength Drill Pipe Tool-Joint Seal HP Bit TT

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7 Comparison of Drilling Methods 1200 Drilling Rate (ft/hr) Conventional Drilling Motor/Jet Bit Rotary Motor TT

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9 High Pressure CT Drilling System (Single Flow) CT Reel Injector Head LP & HP Pumps Conventional Coiled Tubing HP Flow Single Flow HP Motor (Solid Rotor) Single-Flow HP Bit TT

10 Project Participants Maurer Engineering - Motors and Bits Quality Tubing - HP Coiled Tubing Stewart & Stevenson - CT Rig BJ Services - Field Operations Marathon - Operator Requirements ARCO - Operator Requirements TT

11 A Noble Drilling Corporation Subsidiary HP Motor Design Curtis Leitko TT

12 High Pressure CT Motor (Single Flow) Titanium Drive Shaft PDC Thrust Bearings PDM Multilobe Rotor/Stator (3 1/8 ) 2 3/8 CT Solid Rotor High Pressure Jet Bit Radial Bearings/ Flow Restrictors Solid Titanium Flexshaft Titanium Flexshaft Filter High Pressure Low Pressure TT

13 Thrust Load on Bearing 10,000 PSI Seal Housing 34,000 lb Force Thrust Bearing Bit TT

14 Candidate Bearings Ball Bearing PDC Bearing TT

15 Bearing Load Comparison rpm 16,800 Load Capacity Ball Bearing PDC Bearing TT

16 Motor Labyrinth Seals 5 } Upper Restrictor Housing 5 Fluid Flow Shaft } Lower Restrictor TT

17 Motor Labyrinth Leakage Flow Rate (gpm) Four 5 Labyrinths 10,000 psi 8.1 w " 0.006" Leakage Clearance (w) TT

18 Advanced Geothermal Turbodrill (AGT) Bearing Pack Speed Reducer Turbine TT

19 Planetary Gears Sun Gear Planet Gears Ring Gear TT

20 Turbodrill Performance With Gear Box Without Gear Box Rotary Speed (RPM) Torque (ft-lbs) TT

21 HP Bit Design TT

22 High Pressure Jet Bit High Pressure Jets TT

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24 A Noble Drilling Corporation Subsidiary HP Coiled-Tubing Design John H. Cohen TT

25 Coiled Tubing Burst Pressure (100,000 psi yield) CT Diameter (in.) Wall Thk. (in.) Burst Pressure (psi) 20,800 24,160 22,670 20,910 19,800 16,670 13,770 11,310 TT

26 Fatigue Life (trips) CT FATIGUE LIFE (based on MEI CTLIFE model) 1.75" 2.00" QT ,000 9,000 12,000 Internal Pressure (psi) TT

27 Fiberspar Spoolable Products Production Tubing - FS PT Line Pipe - FS LP Coiled Tubing -FS CT (for Well Servicing) TT

28 First FS CT Field String 6500 Ft. Length, 1.5 OD TT

29 Burst Pressure (psi) inch OD CT Burst Pressure QT-1000 Incoloy-625 Composite TT

30 Hybrid Coiled Tubing Composite CT Steel CT TT

31 A Noble Drilling Corporation Subsidiary High Pressure Motor Tests John H. Cohen TT

32 Mud Motor Dynamometer Test Stand Dynamometer Flex Shaft Leak Tank Fluid Inlet Motor TT

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35 2000 psi TT

36 10,000 psi TT

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39 CT High Pressure Jet Drilling Rate Drilling Rate Leauder Limestone 3-1/8 Bit Rotary Conventional High Pressure Motor Motor TT

40 A Noble Drilling Corporation Subsidiary DOE High-Pressure Coiled Tubing Drilling System Phase III Commercialization William C. Maurer August 8, 2000 TT

41 Phase III Commercialization Start Date Oct. 1, 2000 Phase III Budget $3,152,498 DOE Phase III Funding $1,585,556 Objective: Field test and demonstrate prototype CT Drilling System Sub Contractors: BJ Services Quality Tubing TT

42 Phase III Tasks 1. Conduct shallow field test 2. Modify system 3. Conduct deep field test 4. Develop Commercialization Plan 5. Write Final Report TT

43 Phase III Plans Shallow field tests Deeper field tests Commercial tests - Catoosa - Marathon Oil - BJ Services TT

44 Drilling (Vertical) Conventional Coiled Tubing HP Flow High Pressure Motor High Pressure Bit TT

45 Jet Slotting Stimulation Slots Formation Damage High Pressure Jets TT

46 Formation Damage Mechanism (Timmerman, 1982) Pressure profile in the formation Dp skin = Pressure drop across the damaged zone Skin or zone of damage TT

47 In must homogeneous matrix situations, the physical depth of solids invasion tends to be shallow (1-2 cm into the formation) (Bennion et al., 2000) TT

48 Well Bore Helical Slotting Glacier Bluff Dolomite 10,000 psi Jet TT

49 Texas Cream Limestone 10,000 psi Jet TT

50 Tubing Drilling Cement High Pressure Jets Cement TT

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53 CT Cement Cleanout Rates ROP (ft/hr) Low Pressure 10,000 psi TT

54 Cement Cleanout Assumptions Conventional ROP = 60 ft/hr Jet ROP = 600 ft/hr Conv. CT Rig = $10,000/day Jet CT Rig = $20,000/day Land Rig = $5,000/day Offshore Rig = $200,000/day Well Depth = 10,000 ft. Conv. Land Cost = ($10,000 + $5,000) x 10, x 24 = $104,000 TT

55 Cement Cleanout Costs (Land Well) Cleanout Costs ($ 1000's) Conventional Jet 21 Cost TT

56 Cement Cleanout Costs (Offshore Well) Cleanout Costs ($Millions) Conventional Jet 0.15 Cost TT

57 Tubing Barite Scale Removal High Pressure Jets Barite Scale TT

58 Open slots Jetting slots Tubing Cleaning Slotted Liners High Pressure Jets Plugged slots TT

59 Hole Reaming/Cleaning Reamed Hole Hole Guide High Pressure Jets Predrilled Hole TT

60 Under Reaming Casing High Pressure Jets TT

61 Drilling (Horizontal) TT

62 Phase III Commercialization BJ Services CT field operations Quality Tubing High Pressure CT Marathon Oil Field test sites Maurer Engineering HP motor/bit development TT

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64 Potential Market Applications Number Wells Income Per Well Annual Income Drilling 500 $100,000 $50 Million Open-Hole Slotting 1000 $30,000 $30 Million Cement Cleanout 100 $50,000 $5 Million Total Income = $85 million/year TT

44. Bit record form Rig site daily drilling report form Office drilling report Computerized drilling information network

44. Bit record form Rig site daily drilling report form Office drilling report Computerized drilling information network Figures v Tables vii Foreword ix Acknowledgments xi Units of Measurement xii Introduction 1 Well Planning 5 Bits 9 Bit Selection 9 Bit Design 11 How Bits Drill 12 Roller Cone Bits 13 Natural Diamond Bits