Backflush filter system for downhole pumps

Details Backflush filter system for downhole pumps Backflush filter system for downhole pumps

1995-01-19

1996-02-27

Novosad, Stephen J.

Wells

Processes

Cleaning or unloading well

166 53, 166 68, 166105, 166 64, 210747, 210108, 210411, B01D 2966, E21B 3708, E21B 3706

Patent

active

054941091

ABSTRACT:
A well rod pump having a filter system to remove particulate material from the fluids produced from the well and an automatic back flush system using pumped fluid to flush particulate material from the filter system in response to increased pressure differential across the filter system, including a rod moved by a piston to open the valves of the pump, and a time delay connected to continue to hold the valves open for a period sufficient to allow back flushed particles to settle in the well. Well treatment chemicals may be injected into the well with the back flushing fluid.

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patent: 4969518 (1990-11-01), Schmitt et al.
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