Transcript Slide 1
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Advanced High-Pressure Coiledtubing Drilling System
Dr. William C. Maurer
JUNE 1, 2007
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Project Objective
To
develop a high-pressure jet
assisted drilling system that uses
coiled tubing to convey the fluid to
the bit and motor avoiding the
problems of leaks that occurs with
jointed pipe.
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Project Structure
Phase
I – Feasibility study
Phase II – Development of highpressure motors, bits and other
critical components.
Phase III – Field testing and
commercialization
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Phase I & II Results
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Coiled-Tubing
Confirmed
feasibility of coiledtubing system
Calculated fatigue life of coiled
tubing
Developed improved tubing
(QT1200)
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Coiled Tubing Burst Pressure
(100,000 psi yield)
CT Diameter (in.)
Wall Thk. (in.)
Burst Pressure (psi)
1.00
0.109
20,800
1.25
0.156
24,160
1.50
0.175
22,670
1.75
0.188
20,910
2.00
0.203
19,800
2.375
0.203
16,670
2.875
0.203
13,770
3.500
0.203
11,310
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CT Burst Pressure
40000
Burst Pressure (psi)
2.00 inch OD
30000
20000
10000
0
QT-1000
Incoloy-625
Composite
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CT FATIGUE LIFE
Fatigue Life (trips)
200
(based on MEI CTLIFE model)
1.75"
2.00"
150
QT-1000
100
50
0
6,000
9,000
12,000
Internal Pressure (psi)
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Fatigue Test Machine
CT Sample
Straight
Bending Form
Pressure
Controller
Hydraulic
Actuator
Curved Bending Form
Pump
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Fig. 7-2Tubing
Fatigue Fatigue
Life of 1-1/2”
Coiled Tubing
Tests
(R. Stanley, 2000)
500
Actual Cycles for QT-1200
(0.156” Wall)
450
Model Cycles for QT-1000
Fatigue Life (cycles)
400
Model Cycles for QT-800
350
300
250
200
150
100
50
0
1000
2000
3000
4000
5000
6000
7000
8000
9000 10000 11000 12000 13000 14000
Internal Test Pressure (psi)
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High-Pressure Motor
Designed
HP power section
Developed labyrinth seal
Proved Diamond bearing
technology
Laboratory tested motor
Manufactured HP PDC bits
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Motor Labyrinth Seals
}
5”
Housing
Fluid
Flow
5”
}
Upper Restrictor
Shaft
Lower Restrictor
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Motor Labyrinth Leakage
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Flow Rate (gpm)
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Four 5” Labyrinths
10,000 psi
w
12.1
12
10
8
8.1
6
4
2
0
0.004"
Leakage Clearance (w)
0.006"
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Thrust Load on Bearing
10,000 PSI
Seal
Housing
34,000 lb
Force
Thrust Bearing
Bit
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Candidate Bearings
Ball Bearing
PDC Bearing
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Bearing Load Comparison
20000
100 Hours @ 300 rpm
16,800
Load Capacity
15000
10000
5600
5000
0
Ball Bearing
PDC Bearing
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High-Pressure Coiled Tubing
Motor
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10,000 psi
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High Pressure Jet-Drilling Rates
Jet Drilling Rate (ft/in)
1600
1500
Bit Weight = 2000 lbs
= 10,000 psi
= 1,000 psi
1400
1200
910
(WOB=1000 lbs)
1000
800
600
780
400
200
142
255
68
0
Texas
Cream
Limestone
Leander
Limestone
Glacier
Bluff
Dolomite
120
110
Pecos
Red
Sandstone
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Jet Slotting
Developed
1-11/16 HP motor
Developed jet slotting
Developed gear box for jet slotting
Confirmed ability to jet in over
pressure condition
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Fig. 13
Jet Slotting
Stimulation
Slots
Formation
Damage
High
Pressure Jets
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Fig. 14
Jet Slots In Glacier Bluff Dolomite
10,000 psi Jet Pressure
Axial Velocity 140 in/min
Rotary Speed 6 rpm
Slot
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Fig. 11
DRC Wellbore Simulator Drilling Stand
Cuttings Removal Screen
Choke
Borehole Pressure
Rock
Drilling
Fluid Input
Shaft
Seal
Pressure Chamber
Formation Pressure
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Fig. 12
Effect Of Wellbore Pressure
1800
1600
(High Pressure Drilling)
Texas Cream Limestone
2000 lb Bit Weight
ROP (ft/hr)
1400
1200
1000
Wellbore Pressure = 2000 psi
Jet Pressure
= 9300 psi
1010
920
800
600
400
200
0
0 psi
2000 psi
Wellbore Pressure
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Tubing
Drilling Cement
High
Pressure Jets
Cement
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Tubing
Barite Scale Removal
High
Pressure Jets
Barite Scale
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Jetting slots
Open slots
Cleaning Slotted
Liners
Tubing
High
Pressure Jets
Plugged slots
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Hole
Reaming/Cleaning
Hole Guide
Reamed Hole
High
Pressure Jets
Predrilled Hole
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Under Reaming
Casing
High
Pressure Jets
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CT Cement Cleanout Rates
1200
1000
ROP (ft/hr)
1000
800
600
400
200
60
0
Low Pressure
10,000 psi
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Phase III -- Plans
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Phase III SOW
Assemble
HP-CT system
NEPA
Upgrade
CT software
Shallow field test (Catoosa)
Modify tools
Deep field test
Horizontal well applications
Commercialization plan
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NEPA
Determine
data needed
Develop reporting form
Supply Catoosa data
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Upgrade CT Life
Develop
new algorithms to
calculate stresses due to HP
Determine effect of HP on fatigue
Incorporate new algorithms
Incorporate new CT materials
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Shallow Field Test
Visit
Catoosa
Cohen
BJ
services (Kelly Falk &/or Jay
Albrecht)
Write
Drill
engineered work plan
Depth 2000 ft
File
NEPA documents
Test drilling & slotting system
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Deep Field Test
Modify
tools
NEPA
Engineered
work plan
Test to minimum depth 8,500 to
10,000 ft
Commercialization plan
Market
survey
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