Weatherford 2011 sucker rod pump catalog
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© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
Double Traveling Valve &
Standing Valves
z Extra set of valves offer backup seal in
the event of trash or valve wear.
z Extra set of valves reduces the unswept
area in the pump, which reduces the
compression ratio, thus limiting the
pumps ability to handle gas.
z More parts = more expensive pump
Advantages
Disadvantages
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ARTIFICIAL LIFT SYSTEMS
®
Traveling Valves
Closed-Type
Cage for Pin-
End Plunger
Closed-Type
Cage for Box-
End Plunger
Open-Type Cage for
Traveling Barrel
Pump Barrel
Closed-Type
Cage,
Insert Style
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ARTIFICIAL LIFT SYSTEMS
®
Piston Steel Chrome Molly Stainless Steel N50
Spray Metal
Coating
C1045 Carbon A4140 431 N50
Nickel Base
Alloy
Chemical Analysis
Carbon C 0.41 - 0.49 0.38 - 0.43 0.20 max 0.06 max 0.50 - 1.00
Manganese Mn 0.60 - 0.87 0.75 - 1.00 1.00 max 4.00 - 6.00
Phosphorus P 0.04 max 0.035 max 0.04 max 0.00 - 0.02
Sulfur S 0.05 max 0.04 max 0.03 max 0.00 - 0.02
Chromium Cr 0.80 - 1.10 15.00 - 17.00 20.50 - 23.50 12.00 - 18.00
Silicon Si 0.15 - 0.35 1.00 max 1.00 max 3.50 - 5.50
Iron Fe Balance Balance 3.00 - 5.50
Boron B 2.50 - 4.50
Cobalt Co 0.00 - 0.10
Nickel Ni 1.25 - 2.50 11.5 - 13.50 66.00 - 79.00
Copper Cu
Nitrogen N 0.20 - 0.40
Molybdenum Mo 0.15 - 0.25 1.50 - 3.00
Properties
Tensile 90K - 120K 120K - 150K 120K min 135K min N/A
Yield 85K - 110K 90K - 120K 100K min 105K min N/A
Elongation 9% - 12% 10% - 20% 20% 20% N/A
Hardness Rc 19 - 28 Rc 25 - 33 Rc 24 - 55 Rc 35 max Rc 55 - 62
Raw Material
General Terminology for
Polished Rod
Piston Steel Chrome Molly Stainless Steel N50
Spray Metal
Coating
C1045 Carbon A4140 431 N50
Nickel Base
Alloy
Chemical Analysis
Carbon C 0.41 - 0.49 0.38 - 0.43 0.20 max 0.06 max 0.50 - 1.00
Manganese Mn 0.60 - 0.87 0.75 - 1.00 1.00 max 4.00 - 6.00
Phosphorus P 0.04 max 0.035 max 0.04 max 0.00 - 0.02
Sulfur S 0.05 max 0.04 max 0.03 max 0.00 - 0.02
Chromium Cr 0.80 - 1.10 15.00 - 17.00 20.50 - 23.50 12.00 - 18.00
Silicon Si 0.15 - 0.35 1.00 max 1.00 max 3.50 - 5.50
Iron Fe Balance Balance 3.00 - 5.50
Boron B 2.50 - 4.50
Cobalt Co 0.00 - 0.10
Nickel Ni 1.25 - 2.50 11.5 - 13.50 66.00 - 79.00
Copper Cu
Nitrogen N 0.20 - 0.40
Molybdenum Mo 0.15 - 0.25 1.50 - 3.00
Properties
Tensile 90K - 120K 120K - 150K 120K min 135K min N/A
Yield 85K - 110K 90K - 120K 100K min 105K min N/A
Elongation 9% - 12% 10% - 20% 20% 20% N/A
Hardness Rc 19 - 28 Rc 25 - 33 Rc 24 - 55 Rc 35 max Rc 55 - 62
Raw Material
General Terminology for
Polished Rod
Polished Rod Specifications
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ARTIFICIAL LIFT SYSTEMS
®
Special Applications
& Considerations
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ARTIFICIAL LIFT SYSTEMS
®
Pump Failure Types
z Operational
z Well Condition
z Mechanical
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ARTIFICIAL LIFT SYSTEMS
®
Operational Problems
z Bottomhole Assembly design
z Bad spacing of pump
z Bad seating nipple
z Deviated wells
z Loose Tubing Anchor
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ARTIFICIAL LIFT SYSTEMS
®
Well Condition Problems
z Fluid Pound
z Gas Locking
z Sand
z Scale
z Corrosion
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ARTIFICIAL LIFT SYSTEMS
®
Mechanical Problems
z Seized Pumps
z Parted V-Rods
z Split Cages
z Split Barrels
z Scored Plungers
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ARTIFICIAL LIFT SYSTEMS
®
Solutions to
“Well” Known Problems
z Gas Locking
z Sand Problems
z Heavy Oil
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
What is Gas Locking?
Gas Lock Occurs when a barrel is
completely filled with Gas.
Gas can not be compressed enough to
overcome the Hydrostatic head acting
on the traveling valve.
Consequently both valves remain
closed and the pump is gas locked.