Back to results
US 2020/0224652 A1Published application
Hydraulic pumping system
AssigneeRichard Frederick MCNICHOL
InventorsRichard F. McNichol, Alexandre Eroujenets
Life of this patent
Estimating the term…
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.
Claims24
A pumping apparatus for a well, comprising:
- a power fluid passage in fluid communication with a power fluid line;
- a product fluid passage in fluid communication with a product fluid line;
- a piston reciprocatingly mounted within the pumping apparatus, the piston defining a product fluid chamber in fluid communication with the product fluid passage and comprising a first check valve;
- a bottom block positioned at a bottom portion of the pumping apparatus, the bottom block comprising a well fluid inlet having a second check valve;
- a well fluid intake chamber positioned between the bottom block and the piston and configured to receive well fluid through the second check valve when the second 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 product fluid chamber via one or more vents;
- wherein the product fluid chamber is configured to receive well fluid from the well fluid intake chamber through the first check valve when the first check valve is open.
5 more elements
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 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 vents.
6 more elements
(canceled)
(Canceled)
Dependencies are inferred from the claim text.