Don-Nan RWB API Insert Pumps | Schlumberger

Don-Nan RWB API Insert Pumps

RWBC and RWBM standard sucker rod pumps

Reduce the number of pump connections

RWB API insert pumps are thin-walled, stationary barrel, bottom hold-down pumps recognized by API as a standard design. These pumps are most often used in shallow to moderate depths where there is little chance of sand accumulation. If sand is an issue, a top hold-down design may be more suitable. Alternatively, nonstandard accessories such as a top seal may be used to eliminate a stuck pump scenario. The thin-walled barrel is threaded on the inside, which reduces the number of connections needed on the pump and enables a larger bore.

Seating options on this pump include mechanical or cup types suitable for high temperatures and mechanical types for simplified well maintenance. A mechanical hold-down does not require repair unless major damage has occurred, and cups should be replaced each time the pump is unset. Both hold-down types follow the same procedure of setting and unsetting by placing the weight of the sucker rods down on the pump or by lifting up.

Like all API pumps, RWB API insert pumps can be modified with specialty components to better address pumping issues caused by sand and gas. Because of the exposure to stagnant fluid on the exterior of the pump barrel, a bottom discharge valve is recommended to enable fresh fluid to be moved into the area directly above the standing valve of the pump.

RWB API Insert Pump
Stationary assembly: A=Guide, valve rod; B=Connector, upper barrel; C=Barrel, thin wall; D=Cage, closed barrel; E=Valve, ball and seat | Traveling Assembly: F=Bushing, valve rod; G=Rod, valve; H=Coupling, plunger adapter; I=Plunger; J=Cage, closed plunger; K=Valve, ball and seat; L=Plug, seat | Seating Assembly: M=API, 3-cup.
Don-Nan RWB API Insert Pumps
Applications
Low-sand, low-fluid-level, and shallow- to moderate-depth wells
Benefits
Highly adaptable, high-fluid-volume insert pump
Features
Thin-walled barrel, bottom hold-down, and universally accepted design

Address common problems such as rodstring wear and damage caused by gas interference, erosion, or insufficient fluid levels. 

Sucker Rod Pump

Extend the life of your rod lift system with greater flexibility

These products provide greater flexibility during operations and can extend the life of the rod lift system.

Sand specialty products

  • Top seal: Prevent a stuck pump scenario caused by solids accumulation around the hold-down.
  • Sand diverter: Direct solids away from the pump barrel, maintain downhole pump integrity, and extend run life.
  • Bottom discharge valve: Keep particulate matter from settling and sticking the pump and greatly reduce the adverse effects of corrosive fluid.

Gas specialty product

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