Don-Nan Two-Stage Hollow Valve Rod Pump | Schlumberger

Two-Stage Hollow Valve Rod Pump

Sucker rod pump for reduced gas interference

The versatile two-stage hollow valve rod pump improves production in a variety of applications, especially those where gas interference is an issue.

This pump uses an oversized standing valve for maximum compression ratio. Additionally, the use of a secondary traveling valve atop the assembly holds the weight of the fluid column in the tubing so that the lower traveling valve can more easily open, reducing gas interference.

Sucker Rod Pump
Don-Nan Two-Stage Hollow Valve Rod Pump
Applications
Wells with moderate gas and solids
Benefits
Increased rigidity in traveling assembly and improved gas handling
Features
Double traveling, oversized standing, and hollow valve rod with high compression ratio

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

Don-Nan Sand Diverter

Extend the life of your rod lift system with greater flexibility

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

  • 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.
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