Pressure-operated valve, particularly for a downhole pump

Details Pressure-operated valve, particularly for a downhole pump Pressure-operated valve, particularly for a downhole pump

1985-09-30

1987-06-23

Croyle, Carlton R.

Pumps

Successive stages

166304, 417394, 417440, 417478, E21B 3706

Patent

active

046749594

ABSTRACT:
A pressure-operated valve is provided, particularly for use with a downhole pump of the fluid-driven, successive-stage, bladder type. Such a pump includes a plurality of pump and transfer modules. The pump modules have bladders which are operated by fluid, preferably gas, under pressure supplied through two separate internal passages in the modules to pump liquid upwardly through transfer modules. The pressure-operated valve is located below the bottom of the pump module and normally closes off the two gas passages. When gas under pressure above operating pressure is supplied through one of the passages, to establish a sufficient pressure differential between the passages, the valve opens to connect the passages. Heated gas can then be circulated to increase the temperature of internal oil passages extending through the modules to prevent paraffin formation. The two gas circuits can also be connected to enable removal of condensate. Periodic opening or closing of the valve to enable one of these operations for a predetermined length of time can be done automatically or manually utilizing the surface controls provided with the pumping system.

REFERENCES:
patent: 3039309 (1962-06-01), Vesper et al.
patent: 3152645 (1964-10-01), Abbott
patent: 3297083 (1967-01-01), Taylor
patent: 3361205 (1968-01-01), Waldron
patent: 3532164 (1970-10-01), Enright
patent: 4011906 (1977-03-01), Alexander et al.
patent: 4158530 (1979-06-01), Bernstein
patent: 4224993 (1980-09-01), Huckaby
patent: 4468175 (1984-08-01), Owen

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