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TT99-84 1
Artificial Lift Utilizing CT as a Hollow Sucker Rod
Humberto F. Leniek
COIL TUBING AMERICAS
Dr. William C. Maurer
MAURER ENGINEERING INC.
Engineering Inc.
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Stekoll Slimhole Pumping System (1960)
Flow Line
Rubber Hose
1 Tee
Clamp
Polished Rod Liner
2 7/8 Casing
1 EUE Pumping String
Traveling Barrel Insert Pump
Slip-Type Hold-Down with Rubber Removed Screen
Blind Cage
Gas Vent
Conventional Stuffing Box
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Stekoll Field Well (1960)
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STEKOLL Field Experience (1960)
Over 1,000 Wells
3,000 to 5,000 Foot Wells
1 EUE Tubing (Hollow Sucker Rod)
2-1/2 & 2-7/8 Inch Casing
70 BOPD
40 to 50% Reduction in Tubular Costs
17% Overall Cost Savings
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STEKOLL Slimhole Wells (1960)
Bolton Field, Kansas (1,000 ft) - 1,000 Wells
Corsicana, Texas (1,200 ft) - 300 Wells
Panhandle, Texas (3,000 ft) - 20 Wells
Canada (5,000 ft) - 15 Wells
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STEKOLL Slimhole Operations (2-7/8)
Drilling & Logging
Perforating & Squeeze Cementing
Acidizing & Fracturing
Fishing & Washovers
Sand Bailing
Dual Completions
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Hollow Sucker Rod Advantage
The hollow sucker rod combines the function of the sucker rod and the tubing, so it is no longer necessary to pull both sucker rods and tubing when working over wells.
STEKOLL, 1960
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STEKOLL System Limitations (1960)
Limited Slimhole Logging Tools
Workover Concerns
Tubing Failures
Resistance to Slimholes
Resistance to New Technology
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Leniek Pumping System (1999)
Production Line
1-1/2 Hydraulic Hose
Clamp
Hollow Polish Rod
2-7/8 or 3-1/2 Casing (CT or Tubing)
1-1/2 Coiled Tubing
Hollow Rod Pump
Anchor Screen
Gas Vent
Stuffing Box
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Leniek CT Pumping System
Conventional Surface Equipment
1,000 to 5,000 Feet
2-7/8 or 3-1/2 Casing (CT or Tubing)
1-1/2 CT (Hollow Sucker Rod)
Hollow Polish Rod
Hollow Rod Pump
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Leniek Surface Equipment
(1999)
Lubricated Stuffing Box
Hollow Polish Rod
Dynamometer Holder
Bridel
Polish Rod Clamp
1-1/2 Hydraulic Hose
Production Line
U Tube
Hydraulic Connector
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Hollow Rod Pump
Screen
Anchor Perforations
1-1/2 Coiled Tubing
2-7/8 or 3-1/2 Casing (CT or Tubing)
Gas Gas
Oil
Oil
Leniek Bottomhole Assembly
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Coiled Tubing
Hollow Pull Rod
Pump Plunger
Traveling Valve
Standing Valve
Hollow Rod Conventional
Pump Barrel
Pump Barrel
Pull Rod
Tubing
Pump Plunger
Traveling Valve
Conventional Seating Nipple
Standing Valve
Pump Barrel
Sucker Rod Pumps
Anchor
Tubing
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Leniek System Advantages
Reduce Well Construction Cost 50 Percent
Eliminates Tubing Thread Failures
Eliminates Tubing Anchors
Reduce Lifting Costs
Reduce Paraffin Problems
Reduce Casing Wear
Treat Wells Through CT
Eliminate Rod Failures
Allows Ultraslim Holes
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Initial Concerns
CT Fatigue Failures
CT Buckling
CT Wear
Casing Wear
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Argentina YPF Test (1998-1999)
San Jorge Basin
2,600 Foot Well
60 BPD
2-7/8 Casing (Tubing)
1-1/2 CT
13 Months (No Failures)
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YPF Test
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YPF Test
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YPF Test
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Project Name: Well Name: CT OD (in): CT Wall Thickness (in): Casing Pipe OD (in): Casing Pipe Weight (lb/ft): CT Yield Strength (psi): CT Weld Reduction Factor: Stress Concentration Factor: Fatigue Strength Coefficient: Pumping Fluid Density (ppg): CT Job Corrosion Factor: Stroke Rate (stk/min): Pumping Stroke Length (in): CT Length (ft):
CTPS XYZ
1.500 0.1340 3.500 9.380
100000 1 1
125000 8.33
1 6 74
6000
Coiled Tubing Pumping Fatigue Model CT Length (ft)
1000 1207 1414 1621 1828 2034 2241 2448 2655 2862 3069 3276 3483 3690 3897 4103 4310 4517 4724 4931 5138 5345 5552 5759 5966 6172 6379 6586 6793 7000
Years to Failure
>30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >20 >10 7.61 4.64 2.87
Acceptable
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CT Fatigue Life vs Stroke Rate
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Leniek Potential Applications
Marginal Oilfields
Shallow Wells
Low Production Wells (
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Leniek Marketing Options
Start Service Company
Form Alliances with Service Companies
License Patent Rights to Service Company
Sell Territorial Rights to Operators
Form Partnership With Major Independent
Drill Slimholes Free For Oil Participation
Purchase Shallow Fields and Become Operator
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Installation & Workover Requirements
CT Rig
New CT
Good Supervision
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Future Requirements
CT Centralizers
Low Cost CT Pulling Units
Trained Personnel
Industry Acceptance
Service Company Supplier
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Project Name: Well Name: CT OD (in): CT Wall Thickness (in): Casing Pipe OD (in): Casing Pipe Weight (lb/ft): CT Yield Strength (psi): CT Weld Reduction Factor: Stress Concentration Factor: Fatigue Strength Coefficient: Pumping Fluid Density (ppg): CT Job Corrosion Factor: Stroke Rate (stk/min): Pumping Stroke Length (in): CT Length (ft):
CTPS XYZ
1.500 0.1340 2.875 5.059 80000
1 1
105000 8.33
1 6 74
4000
Coiled Tubing Pumping Fatigue Model CT Length (ft)
1000 1207 1414 1621 1828 2034 2241 2448 2655 2862 3069 3276 3483 3690 3897 4103 4310 4517 4724 4931 5138 5345 5552 5759 5966 6172 6379 6586 6793 7000
Years to Failure
>30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >20 >10 6.66 3.82 2.25 1.35 0.83 0.52 0.33 0.22 0.14 0.09 0.06 0.04 0.03 0.02
Acceptable
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Project Name: Well Name: CT OD (in): CT Wall Thickness (in): Casing Pipe OD (in): Casing Pipe Weight (lb/ft): CT Yield Strength (psi): CT Weld Reduction Factor: Stress Concentration Factor: Fatigue Strength Coefficient: Pumping Fluid Density (ppg): CT Job Corrosion Factor: Stroke Rate (stk/min): Pumping Stroke Length (in): CT Length (ft):
CTPS XYZ
1.500 0.1340 3.500 9.380 80000
1 1
105000 8.33
1 6 74
4000
Coiled Tubing Pumping Fatigue Model CT Length (ft)
1000 1207 1414 1621 1828 2034 2241 2448 2655 2862 3069 3276 3483 3690 3897 4103 4310 4517 4724 4931 5138 5345 5552 5759 5966 6172 6379 6586 6793 7000
Years to Failure
>30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >10 8.55 4.48 2.43 1.35 0.78 0.46 0.27 0.17 0.11 0.07 0.04 0.03 0.02 0.01 0.01 0.01 0.00
Unacceptable
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Project Name: Well Name: CT OD (in): CT Wall Thickness (in): Casing Pipe OD (in): Casing Pipe Weight (lb/ft): CT Yield Strength (psi): CT Weld Reduction Factor: Stress Concentration Factor: Fatigue Strength Coefficient: Pumping Fluid Density (ppg): CT Job Corrosion Factor: Stroke Rate (stk/min): Pumping Stroke Length (in): CT Length (ft):
CTPS XYZ
1.500 0.1340 3.500 9.380 90000
1 1
115000 8.33
1 6 74
4000
Coiled Tubing Pumping Fatigue Model CT Length (ft)
1000 1207 1414 1621 1828 2034 2241 2448 2655 2862 3069 3276 3483 3690 3897 4103 4310 4517 4724 4931 5138 5345 5552 5759 5966 6172 6379 6586 6793 7000
Years to Failure
>30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >20 >10 8.53 4.88 2.85 1.70 1.03 0.64 0.40 0.26 0.17 0.11 0.07
Acceptable
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Project Name: Well Name: CT OD (in): CT Wall Thickness (in): Casing Pipe OD (in): Casing Pipe Weight (lb/ft): CT Yield Strength (psi): CT Weld Reduction Factor: Stress Concentration Factor: Fatigue Strength Coefficient: Pumping Fluid Density (ppg): CT Job Corrosion Factor: Stroke Rate (stk/min): Pumping Stroke Length (in): CT Length (ft):
CTPS XYZ
1.750 0.1560 5.500 14.500 100000
1 1
125000 8.33
1 4 74
6000
Coiled Tubing Pumping Fatigue Model CT Length (ft)
1000 1207 1414 1621 1828 2034 2241 2448 2655 2862 3069 3276 3483 3690 3897 4103 4310 4517 4724 4931 5138 5345 5552 5759 5966 6172 6379 6586 6793 7000
Years to Failure
>30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >10 7.70 3.88 2.01 1.07 0.58 0.33 0.19 0.11 0.06 0.04 0.02 0.01
Unacceptable
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Project Name: Well Name: CT OD (in): CT Wall Thicknes