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US 12,473,907 B1Granted
Double-acting downhole hydraulic reciprocating pump system and methods of using same
OwnerJames R. Redfearninventor
Life of this patent
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Abstract
A method of pumping produced liquids from the depths of a wellbore during a reset stroke and a power stroke of a pump located downhole, wherein the pump comprises an upper barrel, a lower barrel, an upper plunger within the upper barrel, a lower plunger within the lower barrel, an upper ported intake sub with an upper outlet check valve and an upper intake check valve, a dual ported mandrel, and a lower ported intake sub with a lower intake check valve and a lower outlet check valve.
Claims4
A method of pumping produced liquids in a downhole wellbore during a reset stroke of a pump, comprising:
- providing surface equipment comprising:
- a first three-way valve;
- a positive displacement pump (PDP);
- a second three-way valve;
- and
- a power fluid reservoir, wherein the power fluid reservoir contains power fluid;
- providing a downhole pump comprising:
- an upper barrel;
- a lower barrel;
- an upper plunger, wherein the upper plunger is positioned within the upper barrel;
- a lower plunger, wherein the lower plunger is positioned within the lower barrel;
- an upper ported intake sub, wherein the upper ported intake sub comprises an upper outlet check valve and an upper intake check valve;
- a dual ported mandrel;
- and
- a lower ported intake sub, wherein the lower ported intake sub comprises a lower intake check valve and a lower outlet check valve;
- providing a restroke control line, a power control line, and a produced liquids tube;
- actuating and aligning the first three-way valve, wherein a first flow path is created between the PDP and the restroke control line;
- actuating and aligning the second three-way valve, wherein a second flow path is created between the power control line and the power fluid reservoir;
- and
- pumping the power fluid into the restroke control line, wherein the upper plunger is forced to move toward the surface within the upper barrel, wherein produced liquids in the upper barrel between the upper plunger and the upper ported intake sub are compressed and forced to exit the upper ported intake sub through the upper outlet check valve and into the produced liquids tube, and further wherein the lower plunger is forced to move toward the surface within the lower barrel, wherein power fluid in the lower barrel between the lower plunger and the dual ported mandrel is compressed and returned to the power fluid reservoir through the power control line;
- wherein during the step of pumping power fluid into the restroke power line, the portion of the lower barrel between the lower plunger and the lower ported intake sub is filled with produced liquids through the lower intake check valve.
18 more elements
Dependencies are inferred from the claim text.