Patent US3814545A successfully refreshed from Google Patents.
US3814545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogas lift system
Assignee: Individual
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Filing: 1973-01-19
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Granted: 1974-06-04
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Expires: 1993-01-19
Abstract
Abstract A power fluid is pumped downwardly through a power fluid tube toward the bottom of a well. The power fluid, due to pressure placed on the power oil fluid by a surface pump, forces the production fluid through a check valve and upwardly through a production fluid tube to the surface of the wall. Compressed gas is used to withdraw the power fluid from the power fluid tube so that the production fluid may again rise to the level of the production fluid tube and the pumping cycle is thereafter repeated. The power oil may also be removed by swabbing, rod pump, rotary pump, or any other form of artificial lift which may be applicable to the well.
Inventors
- 👤 W Waters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:37
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/122; E21B43/123; F; F04; F04F; F04F1/00; F04F1/06; F04F1/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
188 words
A system for lifting a production fluid comprising, a well casing, a power fluid tube and a production tube within said well casing, said production tube including a first one-way valve for allowing the production fluid to pass only in the upward direction through the production tube, a second one-way valve located in said well casing below said first one-way valve for allowing said production fluid to pass only in the upward direction, a compressor for forcing a gas through said well casing, a reservoir for storing a power fluid, a pump disposed between said reservoir and said power fluid tube for driving said power fluid from said reservoir through said power fluid tube, said power fluid causing said production fluid to be forced upwardly through said production tube, first means for displacing said power fluid with said gas after a predetermined amount of power fluid has been pumped from said reservoir, and wherein said first means includes a gas lift valve means for passing said gas from said well casing to said power fluid tube, said gas forcing said power fluid back through said power fluid tube.
Claim 2
Independent Claim
188 words
A system for lifting a production fluid comprising, a well casing, a power fluid tube and a production tube within said well casing, said production tube including a first one-way valve for allowing the production fluid to pass only in the upward direction through the production tube, a second one-way valve located in said well casing below said first one-way valve for allowing said production fluid to pass only in the upward direction, a compressor for forcing a gas through said well casing, a reservoir for storing a power fluid, a pump disposed between said reservoir and said power fluid tube for driving said power fluid from said reservoir through said power fluid tube, said power fluid causing said production fluid to be forced upwardly through said production tube, first means for displacing said power fluid with said gas after a predetermined amount of power fluid has been pumped from said reservoir, and wherein said first means includes a gas lift valve means for passing said gas from said well casing to said power fluid tube, said gas forcing said power fluid back through said power fluid tube.
Claim 3
Independent Claim
284 words
A system for lifting a production fluid comprising, a well casing, a power fluid tube and a production tube within said well casing, said production, tube including a first one-way valve for allowing the production fluid to pass only in the upward direction through the production tube, a second one-way valve located in said well casing below said first one-way valve for allowing said production fluid to pass only in the upward direction, a compressor for forcing a gas through said well casing, a reservoir for storing a power fluid, a pump disposed between said reservoir and said power fluid tube for driving said power fluid from said reservoir through said power fluid tube, said power fluid causing said production fluid to be forced upwardly through said production tube, first means for displacing said power fluid with said gas from said compressor after a predetermined amount of power fluid has been pumped from said reservoir, a second means for separating said gas and power fluid, a bypass line connecting said second means to said power fluid tube, a control means for selectively operating said pump, said control means being responsive to the level of power fluid in said reservoir, a bypass valve in said bypass line selectively opened and closed by said control means, and wherein said control means is responsive to a predetermined high level and a predetermined low level of said power fluid in said reservoir, said control means causing said pump to energize and said bypass valve to close upon said power fluid attaining said predetermined high level and said control means causing said pump to de-energize and said bypass valve to open upon said fluid attaining said predetermined low level.
Claim 4
Independent Claim
284 words
A system for lifting a production fluid comprising, a well casing, a power fluid tube and a production tube within said well casing, said production, tube including a first one-way valve for allowing the production fluid to pass only in the upward direction through the production tube, a second one-way valve located in said well casing below said first one-way valve for allowing said production fluid to pass only in the upward direction, a compressor for forcing a gas through said well casing, a reservoir for storing a power fluid, a pump disposed between said reservoir and said power fluid tube for driving said power fluid from said reservoir through said power fluid tube, said power fluid causing said production fluid to be forced upwardly through said production tube, first means for displacing said power fluid with said gas from said compressor after a predetermined amount of power fluid has been pumped from said reservoir, a second means for separating said gas and power fluid, a bypass line connecting said second means to said power fluid tube, a control means for selectively operating said pump, said control means being responsive to the level of power fluid in said reservoir, a bypass valve in said bypass line selectively opened and closed by said control means, and wherein said control means is responsive to a predetermined high level and a predetermined low level of said power fluid in said reservoir, said control means causing said pump to energize and said bypass valve to close upon said power fluid attaining said predetermined high level and said control means causing said pump to de-energize and said bypass valve to open upon said fluid attaining said predetermined low level.
Claim 5
Dependent Claim
38 words
A system for lifting said production fluid of claim 2 wherein said power fluid is introduced into said well casing above said second one-way valve by said pump at a pressure sufficient to close said second one-way valve.
References Cited (Backward Citations)
US3215087A
Cited
US3653717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |