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US 11,608,824 B2Granted
Hydraulic pumping system
AssigneeRichard Frederick McNichol
InventorsRichard Frederick McNichol, Alexandre Eroujenets
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Abstract
Pumps are provided, more particularly piston type pumps having increased energy efficiency, systems incorporating such piston type pumps, and methods of operating piston type pumps. The pumps are suitable for pumping of oil from an oil well or for pumping other liquids such as ground water, subterranean liquids, brackish water, sea water, waste water, cooling water, gas, coolants, and the like.
Claims11
A pumping apparatus for a well, comprising:
- a power fluid passage in fluid communication with a power fluid line;
- a counterbalance fluid passage in fluid communication with a counterbalance fluid line;
- a piston reciprocatingly mounted within the pumping apparatus, the piston defining a counterbalance fluid chamber in fluid communication with the counterbalance fluid passage;
- a first check valve;
- a well fluid intake chamber in fluid communication with well fluid external to the pumping apparatus via one or more well fluid intake chamber vents and in fluid communication with the first check valve;
- a bottom block positioned at a bottom portion of the pumping apparatus, the bottom block comprising a well fluid outlet having a second check valve configured to allow well fluid to flow out of the pumping apparatus when the second check valve is open;
- a well fluid outflow chamber positioned between the well fluid intake chamber and the bottom block, the well fluid outflow chamber configured to receive well fluid through the first check valve when the first check valve is open;
- and
- one or more piston vent chambers, each of the one or more piston vent chambers in fluid communication with the counterbalance fluid chamber via one or more piston vent chamber vents.
6 more elements
Dependencies are inferred from the claim text.