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US 4,540,348 AGranted
Oilwell pump system and method
AssigneeSoderberg Research & Development, Inc.
InventorPaul B. Soderberg
Life of this patent
Estimating the term…
Abstract
A well pump having a power fluid that is to be reciprocated in a conduit so as to power a downhole pump by filling the downhole pump and the lower portion of the power conduit with a hydraulic oil having a specific gravity greater than water and filling the rest of the power conduit with a less compressible fluid such as water.
Claims18
A method for transmitting power to an hydraulic pump, comprising:
- connecting the power chamber of said pump to a suitable pressurizing means by suitable tubing means;
- filling a first portion of said tubing means adjacent said pump with a first hydraulic fluid;
- filling a second portion of said tubing means adjacent said pressurizing means with a second hydraulic fluid less compressible than said first hydraulic fluid;
- and
- operating said pressurizing means to alternately pressurize and depressurize said hydraulic fluids in said tubing means to operate said hydraulic pump.
2 more elements
A system for transmitting power to an hydraulic pump suitable for use in a borehole, comprising:
- pressurizing means for alternately pressurizing and depressurizing said hydraulic pump means;
- means for connecting the power chamber of said hydraulic pump means with said pressurizing means;
- a first hydraulic fluid filling a first portion of said connecting means adjacent said pump means;
- and
- a second hydraulic fluid filling a second section of said connecting means adjacent said pressurizing means, said second hydraulic fluid being less compressible than said first hydraulic fluid.
2 more elements
Dependencies are inferred from the claim text.