A Noble DrillingCorporation Subsidiary

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April 19, 2001

Coiled-Tubing High Pressure

Jet Drilling System

Dr. William C. Maurer

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HP Pump

HP Line

HP Rotary Hose

HP Swivel

High StrengthDrill Pipe

HP Seal

Tool-JointSeal HP Bit

Exxon High Pressure Drill Rig

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Comparison of Drilling Methods

0

200

400

600

800

1000

1200

Conventional Drilling Motor/Jet Bit

Dri

llin

g R

ate

(ft

/h

r)

Rotary Motor

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CT ReelInjector Head

Single-Flow HP Bit

LP & HP Pumps

HP

Flo

w

High Pressure CT Drilling System

(Single Flow)

Single Flow HP Motor(Solid Rotor)

ConventionalCoiled Tubing

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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

A Noble DrillingCorporation Subsidiary

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HP Motor Design

Curtis Leitko

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High Pressure CT Motor (Single Flow)

Titanium Drive Shaft

PDC Thrust Bearings

Titanium

Flexshaft

High Pressure

Jet Bit

Filter

PDM Multilobe

Rotor/Stator (3 1/8”)

2 3/8” CT

Solid Titanium

Flexshaft

Radial Bearings/

Flow Restrictors

High Pressure

Low Pressure

Solid Rotor

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Thrust Load on Bearing10,000 PSI

34,000 lbForce

Seal

Housing

Thrust Bearing

Bit

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Candidate Bearings

Ball Bearing PDC Bearing

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Bearing Load Comparison

5600

16,800

0

5000

10000

15000

20000

Ball Bearing PDC Bearing

Lo

ad

Ca

pa

cit

y

100 Hours @ 300 rpm

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Motor Labyrinth Seals

Upper Restrictor5

5

FluidFlow

Lower Restrictor

ShaftHousing

}

}

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Motor Labyrinth Leakage

8.1

12.1

0

2

4

6

8

10

12

14

16

0.004" 0.006"Leakage Clearance (w)

Flo

w R

ate

(g

pm

)

wFour 5” Labyrinths10,000 psi

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Advanced Geothermal Turbodrill (AGT)

Bearing Pack Speed Reducer Turbine

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Planet GearsSun Gear

Ring Gear

Planetary Gears

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7500

900

85

1100

Rotary Speed Torque

With Gear Box

Without Gear Box

(RPM) (ft-lbs)

Turbodrill Performance

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HP Bit Design

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High Pressure Jets

High Pressure Jet Bit

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A Noble DrillingCorporation Subsidiary

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HP Coiled-Tubing Design

John H. Cohen

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Coiled Tubing Burst Pressure(100,000 psi yield)

CT Diameter (in.)

1.00

1.25

1.50

1.75

2.00

2.375

2.875

3.500

Wall Thk. (in.)

0.109

0.156

0.175

0.188

0.203

0.203

0.203

0.203

Burst Pressure (psi)

20,800

24,160

22,670

20,910

19,800

16,670

13,770

11,310

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0

50

100

150

200

6,000 9,000 12,000

1.75"

2.00"

CT FATIGUE LIFE

Fati

gu

e L

ife

(tri

ps)

Internal Pressure (psi)

QT-1000

(based on MEI CTLIFE model)

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Fiberspar Spoolable Products

Production Tubing - FS PT

Line Pipe - FS LP

Coiled Tubing -FS CT (for Well Servicing)

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First FS CT Field String6500 Ft. Length, 1.5” OD

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0

10000

20000

30000

40000

QT-1000 Incoloy-625 Composite

Bu

rst

Pre

ssu

re (

psi

)CT Burst Pressure

2.00 inch OD

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Composite CT

Hybrid Coiled Tubing

Steel CT

A Noble DrillingCorporation Subsidiary

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High Pressure Motor Tests

John H. Cohen

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Mud Motor Dynamometer Test Stand

Dynamometer

MotorFlexShaft

Leak Tank

Fluid Inlet

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2000 psi

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10,000 psi

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CT High Pressure Jet Drilling Rate

150

300

1600

0

200

400

600

800

1000

1200

1400

1600

1800

Rotary Conventional High Pressure

Dri

llin

g R

ate

Motor Motor

Leauder Limestone3-1/8” Bit

A Noble DrillingCorporation Subsidiary

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DOE High-Pressure Coiled Tubing Drilling System

Phase III Commercialization

William C. Maurer

August 8, 2000

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Objective: Field test and demonstrate

prototype CT Drilling System

Sub Contractors: BJ Services

Quality Tubing

Phase III Commercialization

Start Date Oct. 1, 2000

Phase III Budget $3,152,498

DOE Phase III Funding $1,585,556

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Phase III Tasks

1. Conduct shallow field test

2. Modify system

3. Conduct deep field test

4. Develop Commercialization Plan

5. Write Final Report

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Phase III Plans

Shallow field tests - Catoosa

Deeper field tests - Marathon Oil

Commercial tests - BJ Services

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High Pressure Bit

HP

Flo

w

ConventionalCoiled Tubing

High Pressure Motor

Drilling (Vertical)

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HighPressure Jets

Slots

FormationDamage

Jet SlottingStimulation

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Formation Damage Mechanism(Timmerman, 1982)

Pressure profilein the formation

Dpskin = Pressure drop acrossthe damaged zone

Skin or zoneof damage

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“ 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)

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Glacier Bluff Dolomite 10,000 psi Jet

Well Bore Helical Slotting

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Texas Cream Limestone 10,000 psi Jet

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Ce

me

nt

Tubing

HighPressure Jets

Drilling Cement

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CT Cement Cleanout Rates

60

1000

0

200

400

600

800

1000

1200

Low Pressure 10,000 psi

RO

P (

ft/h

r)

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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 10,000

60 x 24= $104,000

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Cement Cleanout Costs(Land Well)

104

21

0

20

40

60

80

100

120

Cost

Cle

an

ou

t C

osts

($

10

00

's)

Conventional

Jet

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Cement Cleanout Costs(Offshore Well)

0.15

1.46

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

Cost

Cle

an

ou

t C

osts

($

Millio

ns)

Conventional

Jet

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Barite Scale

HighPressure Jets

Tubing Barite Scale Removal

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HighPressure Jets

TubingOpen slots

Plugged slots

Jetting slots

Cleaning Slotted Liners

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Predrilled Hole

Reamed Hole

HighPressure Jets

Hole Guide

Hole Reaming/Cleaning

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HighPressure Jets

Casing

Under Reaming

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Drilling (Horizontal)

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Phase III Commercialization

BJ Services

CT field operations

Quality Tubing

High Pressure CT

Marathon Oil

Field test sites

Maurer Engineering

HP motor/bit development

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Potential Market

Drilling 500 $100,000 $50 Million

NumberWells

IncomePer Well

AnnualIncome

Open-Hole Slotting 1000 $30,000 $30 Million

Cement Cleanout 100 $50,000 $5 Million

Total Income = $85 million/year

Applications