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Reciprocating Rod Pumps

Insert Pumps

API 11AX-compliant insert rod pumps

API 11AX CertifiedISO 9001 · ISO 14001 · ISO 45001

Our products are covered by a range of industry recognized certifications and standards, such as API 11AX, ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018. Quality of our products, confirmed by international certificates, provides for excellent performance of oil wells.

Our insert pumps are designed for conventional beam pumping applications where tubing remains in the well. Manufactured to API 11AX specifications, they offer reliable performance in a wide range of well conditions. ELSI insert pumps are available in multiple barrel configurations and metallurgies to match your production environment.

Certification

API 11AX

Barrel types

Fixed, loose, thin-wall

Materials

Cast iron, ductile, chrome

Specifications

API designationRHA, RHB, RWA, RWB series
Plunger diameter range1.00" – 2.50"
Max stroke length168"
Operating temp-40°C to 150°C
Product Range

Available models.

Select a model below to explore specifications, advantages, available sizes, and the full component line-up.

4models in this series
RHA

RHA

Rod Pump stationary, heavy wall barrel, top anchor

RHA

The ELSI RHA pump is a precision, insert rod type with an API B12 heavy wall barrel and either a cup or mechanical top anchor (hold-down). The API B12 heavy wall barrel is externally threaded and has an inside diameter tolerance of +0.002 / -0.000 inches. The RHA pump assembly is installed in the well on the end of the sucker rod string and seated in the seating nipple installed in the tubing string at a predetermined depth.

Barrel:API B12 heavy wall barrel, externally threaded
Bore sizes:1-1/4"1-1/2"1-3/4"2-1/4"
Designations:RHAC (cup) · RHAM (mechanical)

Advantages

  • Recommended for sandy wells

    Top anchor eliminates sand settling between barrel and tubing on the hold-down. Fluid discharged ~3 inches above hold-down limits sand accumulation.

  • Recommended for low fluid level, gassy or foamy wells

    Top anchor allows standing valve to be submerged in pumped fluid. Pump barrel can act as a gas anchor in gassy installations.

  • Recommended for wells with scale or gyp

    Plunger strokes out both ends of barrel, eliminating gyp or scale forming that could prevent plunger removal.

  • Recommended for wells requiring long pumps

    Barrel hangs from top anchor, allowing self-alignment in deviated or horizontal wells.

Limitations

  • Not recommended for deep wells

    Tensile loading on barrel during downstroke and potential for barrel burst due to internal pressure. Generally not recommended below 7,000 ft.

  • Not recommended for intermittent pumping in sandy wells

    Sand can settle between barrel and plunger during shut-down, potentially causing pump sticking.

  • Tubing erosion opposite top guide

    Fluid flow from guide port can impinge against tubing. Multi-port guides or hollow tube pumps mitigate this.

Available Sizes

Tubing SizePump Bore
2-3/8"1-1/4"
2-7/8"1-1/2"
2-7/8"1-3/4"
3-1/2"2-1/4"
View Full Component Line-up
TypeDescription2-3/8" / 1-1/4"2-7/8" / 1-1/2"2-7/8" / 1-3/4"3-1/2" / 2-1/4"
Traveling Unit
B21Bushing, Valve RodB21-20-XXXXB21-25-XXXXB21-25-XXXXB21-30-XXXX
R11Rod, ValveR11-20-XXXXR11-25-XXXXR11-25-XXXXR11-30-XXXX
C12Cage, Open, Top PlungerC12-125-XXXXC12-150-25-XXXXC12-175-XXXXC12-225-XXXX
P21Plunger, Pin EndP21-125-XXXXP21-150-XXXXP21-175-XXXXP21-225-XXXX
C13Cage, Closed PlungerC13-125-XXXXC13-150-XXXXC13-175-XXXXC13-225-XXXX
V11Valve, Ball and SeatV11-125-XXXXV11-150-XXXXV11-175-XXXXV11-225-XXXX
P12Plug, Seat RetainerP12-125-XXXXP12-150-XXXXP12-175-XXXXP12-225-XXXX
Stationary Unit
G11Guide, Valve RodG11-20-XXXXG11-25-XXXXG11-25-XXXXG11-30-XXXX
C31(x2)Coupling, ExtensionC31-125-XXXXC31-150-XXXXC31-175-XXXXC31-225-XXXX
B12Barrel, Heavy WallB12-125-XXXXB12-150-XXXXB12-175-XXXXB12-225-XXXX
C14Cage, Closed BarrelC14-20-XXXXC14-25-XXXXC14-25-XXXXC14-30-XXXX
V11Valve, Ball and SeatV11-175-XXXXV11-225-XXXXV11-225-XXXXV11-250-XXXX
B22Bushing, Barrel CageB22-20-XXXXB22-25-XXXXB22-25-XXXXB22-30-XXXX
Standard Seating Assembly(RHAC Pump)
S10API 3-Cup, Type HRS10-20-XXXXS10-25-XXXXS10-25-XXXXS10-30-XXXX
S15Bushing, Seating CupS15-20-XXXXS15-25-XXXXS15-25-XXXXS15-30-XXXX
N11Nipple, Seating, CupN11-20-XXXXN11-25-XXXXN11-25-XXXXN11-30-XXXX
Optional Seating Assembly(RHAM Pump)
S21API Mechanical Top LockS21-20-XXXXS21-25-XXXXS21-25-XXXXS21-30-XXXX
N14Nipple, Seating, MechanicalN14-20-XXXXN14-25-XXXXN14-25-XXXXN14-30-XXXX

Notes

  • ▸When a cup hold-down is used, the pump is a type RHAC.
  • ▸When a mechanical hold-down is used, the pump is a type RHAM.
  • ▸XXXX indicates material designator. See pump parts section.
RHB

RHB

Rod Pump stationary, heavy wall barrel, bottom anchor

RHB

The ELSI RHB pump is a precision, insert rod type with an API B12 heavy wall barrel and either a cup or mechanical bottom anchor (hold-down). The API B12 heavy wall barrel is externally threaded and has an inside diameter tolerance of +0.002 / -0.000 inches. The RHB pump assembly is installed in the well on the end of the sucker rod string and seated in the seating nipple installed in the tubing string at a predetermined depth.

Barrel:API B12 heavy wall barrel, externally threaded
Bore sizes:1-1/4"1-1/2"1-3/4"2-1/4"
Designations:RHBC (cup) · RHBM (mechanical)

Advantages

  • Recommended for deep wells

    Balanced pressure around the barrel overcomes tensile loading and burst disadvantages of top anchor pumps.

  • Recommended for wells with low fluid level

    Fluid only needs to pass through anchor and standing valve to reach the producing chamber.

  • Recommended for wells with scale or gyp

    Plunger strokes out both ends of barrel, eliminating scale or gyp formation that could prevent plunger removal.

Limitations

  • Not recommended for sandy wells

    Sand can settle on bottom anchor between barrel OD and tubing ID, causing pump to be sanded in. Top seal assembly can mitigate.

  • Barrel subject to corrosive attack

    Stagnant corrosive fluid between tubing ID and barrel OD. Bottom discharge valve can keep fluid in motion.

  • Not recommended for intermittent pumping in sandy wells

    Sand settles between barrel and plunger during shut-down. Sand check in guide eliminates this problem.

  • Tubing erosion opposite top guide

    Fluid flow from guide port can impinge against tubing. Multi-port guides or hollow tube pumps mitigate this.

Available Sizes

Tubing SizePump Bore
2-3/8"1-1/4"
2-7/8"1-1/2"
2-7/8"1-3/4"
3-1/2"2-1/4"
View Full Component Line-up
TypeDescription2-3/8" / 1-1/4"2-7/8" / 1-1/2"2-7/8" / 1-3/4"3-1/2" / 2-1/4"
Traveling Unit
B21Bushing, Valve RodB21-20-XXXXB21-25-XXXXB21-25-XXXXB21-30-XXXX
R11Rod, ValveR11-20-XXXXR11-25-XXXXR11-25-XXXXR11-30-XXXX
C12Cage, Open, Top PlungerC12-125-XXXXC12-150-25-XXXXC12-175-XXXXC12-225-XXXX
P21Plunger, Pin EndP21-125-XXXXP21-150-XXXXP21-175-XXXXP21-225-XXXX
C13Cage, Closed PlungerC13-125-XXXXC13-150-XXXXC13-175-XXXXC13-225-XXXX
V11Valve, Ball and SeatV11-125-XXXXV11-150-XXXXV11-175-XXXXV11-225-XXXX
P12Plug, Seat RetainerP12-125-XXXXP12-150-XXXXP12-175-XXXXP12-225-XXXX
Stationary Unit
G11Guide, Valve RodG11-20-XXXXG11-25-XXXXG11-25-XXXXG11-30-XXXX
C21Connector, BarrelC21-20-XXXXC21-25-XXXXC21-25-XXXXC21-30-XXXX
C31(x2)Coupling, ExtensionC31-125-XXXXC31-150-XXXXC31-175-XXXXC31-225-XXXX
B12Barrel, Heavy WallB12-125-XXXXB12-150-XXXXB12-175-XXXXB12-225-XXXX
C14Cage, Closed BarrelC14-20-XXXXC14-25-XXXXC14-25-XXXXC14-30-XXXX
V11Valve, Ball and SeatV11-175-XXXXV11-225-XXXXV11-225-XXXXV11-250-XXXX
Standard Seating Assembly(RHBC Pump)
S10API 3-Cup, Type HRS10-20-XXXXS10-25-XXXXS10-25-XXXXS10-30-XXXX
S16Coupling, Seating CupS16-20-XXXXS16-25-XXXXS16-25-XXXXS16-30-XXXX
N11Nipple, Seating, CupN11-20-XXXXN11-25-XXXXN11-25-XXXXN11-30-XXXX
Optional Seating Assembly(RHBM Pump)
S22API Mechanical Btm LockS22-20-XXXXS22-25-XXXXS22-25-XXXXS22-30-XXXX
N12Nipple, Seating, MechanicalN12-20-XXXXN12-25-XXXXN12-25-XXXXN12-30-XXXX

Notes

  • ▸When a cup hold-down is used, the pump is a type RHBC.
  • ▸When a mechanical hold-down is used, the pump is a type RHBM.
  • ▸XXXX indicates material designator. See pump parts section.
RWA

RWA

Rod Pump stationary, thin wall barrel, top anchor

RWA

The ELSI RWA pump is a precision, insert rod type with an API B11 thin wall barrel and either a cup or mechanical top anchor (hold-down). The API B11 thin wall barrel is internally threaded and has an inside diameter tolerance of +0.002 / -0.000 inches. The RWA pump assembly is installed in the well on the end of the sucker rod string and seated in the seating nipple installed in the tubing string at a predetermined depth.

Barrel:API B11 thin wall barrel, internally threaded
Bore sizes:1-1/2"2"2-1/2"
Designations:RWAC (cup) · RWAM (mechanical)

Advantages

  • Recommended for sandy wells

    Top anchor eliminates sand settling between barrel and tubing. Fluid discharged above hold-down limits sand accumulation.

  • Recommended for low fluid level, gassy or foamy wells

    Standing valve submerged in pumped fluid. Barrel acts as gas anchor in gassy installations.

  • Recommended for wells requiring long pumps

    Barrel hangs from top anchor, allowing self-alignment in deviated or horizontal wells.

Limitations

  • Not recommended for deep wells

    Tensile loading and barrel burst risk. Generally not recommended below 5,000 ft.

  • Not recommended for intermittent pumping in sandy wells

    Sand settles between barrel and plunger during shut-down, potentially causing sticking.

  • Tubing erosion opposite top guide

    Fluid flow from guide port can impinge against tubing. Multi-port guides mitigate this.

Available Sizes

Tubing SizePump Bore
2-3/8"1-1/2"
2-7/8"2"
3-1/2"2-1/2"
View Full Component Line-up
TypeDescription2-3/8" / 1-1/2"2-7/8" / 2"3-1/2" / 2-1/2"
Traveling Unit
B21Bushing, Valve RodB21-20-XXXXB21-25-XXXXB21-30-XXXX
R11Rod, ValveR11-20-XXXXR11-25-XXXXR11-30-XXXX
C12Cage, Open, Top PlungerC12-150-20-XXXXC12-200-XXXXC12-250-XXXX
P21Plunger, Pin EndP21-150-XXXXP21-200-XXXXP21-250-XXXX
C13Cage, Closed PlungerC13-150-XXXXC13-200-XXXXC13-250-XXXX
V11Valve, Ball and SeatV11-150-XXXXV11-200-XXXXV11-250-XXXX
P12Plug, Seat RetainerP12-150-XXXXP12-200-XXXXP12-250-XXXX
Stationary Unit
G11Guide, Valve RodG11-20-XXXXG11-25-XXXXG11-30-XXXX
B11Barrel, Thin WallB11-150-XXXXB11-200-XXXXB11-250-XXXX
C14Cage, Closed BarrelC14-20-XXXXC14-25-XXXXC14-30-XXXX
V11Valve, Ball and SeatV11-175-XXXXV11-225-XXXXV11-250-XXXX
B22Bushing, Barrel CageB22-20-XXXXB22-25-XXXXB22-30-XXXX
Standard Seating Assembly(RWAC Pump)
S10API 3-Cup, Type HRS10-20-XXXXS10-25-XXXXS10-30-XXXX
S15Bushing, Seating CupS15-20-XXXXS15-25-XXXXS15-30-XXXX
N11Nipple, Seating, CupN11-20-XXXXN11-25-XXXXN11-30-XXXX
Optional Seating Assembly(RWAM Pump)
S21API Mechanical Top LockS21-20-XXXXS21-25-XXXXS21-30-XXXX
N14Nipple, Seating, MechanicalN14-20-XXXXN14-25-XXXXN14-30-XXXX

Notes

  • ▸When a cup hold-down is used, the pump is a type RWAC.
  • ▸When a mechanical hold-down is used, the pump is a type RWAM.
  • ▸XXXX indicates material designator. See pump parts section.
RWB

RWB

Rod Pump stationary, thin wall barrel, bottom anchor

RWB

The ELSI RWB pump is a precision, insert rod type with an API B11 thin wall barrel and either a cup or mechanical bottom anchor (hold-down). The API B11 thin wall barrel is internally threaded and has an inside diameter tolerance of +0.002 / -0.000 inches. The RWB pump assembly is installed in the well on the end of the sucker rod string and seated in the seating nipple installed in the tubing string at a predetermined depth.

Barrel:API B11 thin wall barrel, internally threaded
Bore sizes:1-1/2"2"2-1/2"
Designations:RWBC (cup) · RWBM (mechanical)

Advantages

  • Recommended for deep wells

    Balanced pressure around barrel overcomes tensile loading and burst disadvantages of top anchor pumps.

  • Recommended for wells with low fluid level

    Fluid only needs to pass through anchor and standing valve to reach producing chamber.

Limitations

  • Not recommended for sandy wells

    Sand can settle on bottom anchor between barrel OD and tubing ID. Top seal assembly can mitigate.

  • Barrel subject to corrosive attack

    Stagnant corrosive fluid between tubing ID and barrel OD. Bottom discharge valve mitigates.

  • Not recommended for intermittent pumping in sandy wells

    Sand settles between barrel and plunger during shut-down. Sand check eliminates this.

  • Tubing erosion opposite top guide

    Fluid flow from guide port can impinge against tubing. Multi-port guides or hollow tube pumps mitigate.

Available Sizes

Tubing SizePump Bore
2-3/8"1-1/2"
2-7/8"2"
3-1/2"2-1/2"
View Full Component Line-up
TypeDescription2-3/8" / 1-1/2"2-7/8" / 2"3-1/2" / 2-1/2"
Traveling Unit
B21Bushing, Valve RodB21-20-XXXXB21-25-XXXXB21-30-XXXX
R11Rod, ValveR11-20-XXXXR11-25-XXXXR11-30-XXXX
C12Cage, Open, Top PlungerC12-150-20-XXXXC12-200-XXXXC12-250-XXXX
P21Plunger, Pin EndP21-150-XXXXP21-200-XXXXP21-250-XXXX
C13Cage, Closed PlungerC13-150-XXXXC13-200-XXXXC13-250-XXXX
V11Valve, Ball and SeatV11-150-XXXXV11-200-XXXXV11-250-XXXX
P12Plug, Seat RetainerP12-150-XXXXP12-200-XXXXP12-250-XXXX
Stationary Unit
G11Guide, Valve RodG11-20-XXXXG11-25-XXXXG11-30-XXXX
B11Barrel, Thin WallB11-150-XXXXB11-200-XXXXB11-250-XXXX
C21Connector, BarrelC21-20-XXXXC21-25-XXXXC21-30-XXXX
C14Cage, Closed BarrelC14-20-XXXXC14-25-XXXXC14-30-XXXX
V11Valve, Ball and SeatV11-175-XXXXV11-225-XXXXV11-250-XXXX
Standard Seating Assembly(RWBC Pump)
S10API 3-Cup, Type HRS10-20-XXXXS10-25-XXXXS10-30-XXXX
S16Coupling, Seating CupS16-20-XXXXS16-25-XXXXS16-30-XXXX
N11Nipple, Seating, CupN11-20-XXXXN11-25-XXXXN11-30-XXXX
Optional Seating Assembly(RWBM Pump)
S22API Mechanical Btm LockS22-20-XXXXS22-25-XXXXS22-30-XXXX
N12Nipple, Seating, MechanicalN12-20-XXXXN12-25-XXXXN12-30-XXXX

Notes

  • ▸When a cup hold-down is used, the pump is a type RWBC.
  • ▸When a mechanical hold-down is used, the pump is a type RWBM.
  • ▸XXXX indicates material designator. See pump parts section.
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