Don-Nan Bottom Discharge Valve | Schlumberger

Don-Nan Bottom Discharge Valve

Produce fluid through and around the pump

Reduce effects of corrosive fluid

The bottom discharge valve is a two-component part placed on the barrel assembly between the standing and traveling valve. The valve acts as an intermediary valve that displaces approximately 10% of pumped fluid to the annulus between the outside of the pump and the tubing wall. The displaced fluid keeps particulate matter from settling and sticking to the pump and keeps fresh fluid moving past the exterior of the pump, greatly reducing the adverse effects of corrosive fluid.


  • Available for 2 3/8- and 2 7/8-in [60.325- and 73.025-mm] insert pump applications
  • Designed with 1 1/4- and 1 1/2-in [31.75- and 38.1-mm] cages


  • Wells with corrosive fluid
  • Wells with low amounts of gas
  • Wells with low to moderate amounts of sand
Bottom Discharge Valve
Bottom discharge valve applies to wells with corrosive fluid, wells with low amounts of gas, and wells with low to moderate amounts of sand.

Prevents corrosive, stagnant fluid from attacking outside of pump and solid material from settling on pump hold-down while enabling full fluid production.

Bottom Discharge Valve on Pump
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