US3718407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage gas lift fluid pump system
Assignee: Individual
•
Filing: 1971-02-16
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Granted: 1973-02-27
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Expires: 1991-02-16
Abstract
Abstract A gas lift pump system utilizing high pressure gas from a pump delivered down a pipe string to a jet pump at the producing zone of a well to provide an initial lift for the fluid and to admix gas and fluid, and a series of supplemental lift devices at spaced intervals along the vertical extent of the well. The supplemental lift devices include a check valve which has the effect of reducing the total head of fluid which each section is called upon to lift and a gas chamber, in conjunction with a pipe mounted within the delivery tubing, to force the fluid into succeeding sections and further promote mixing. The fluid is raised stage by stage until it reaches the surface where the gas is removed and re-cycled.
Inventors
- 👤 J Newbrough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:44
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/129; E21B43/34; E21B43/40; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
In a gas lift pump including a source of gas under pressure communicating with a pump means at the lower end of tube extending into the proximity of a quantity of fluid to be pumped, that improvement comprising: a plurality of supplemental lift means for utilizing a flow of gas through said tubing to lift said fluid, and said supplemental lift means comprising a length of pipe mounted within said tubing and having a portion adjacent its lower end perforated to admit fluid and gas.
Claim 2
Dependent Claim
85 words
In a gas lift pump including a source of gas under pressure communicating with a pump means at the lower end of tube extending into the proximity of a quantity of fluid to be pumped, that improvement comprising: a plurality of supplemental lift means for utilizing a flow of gas through said tubing to lift said fluid, and said supplemental lift means comprising a length of pipe mounted within said tubing and having a portion adjacent its lower end perforated to admit fluid and gas.
Claim 3
Dependent Claim
21 words
The improved pump system of claim 1 wherein, said length of pipe includes a check valve mounted at its upper end.
Claim 4
Dependent Claim
31 words
That improved pump system as claimed in claim 1 wherein, said gas enters said tubing and only at the portion of said tubing in proximity to said quantity of said fluid.
Claim 5
Dependent Claim
63 words
That improved gas lift system as claimed in claim 1 wherein, said pump means comprises a jet pump, said tubing is suspended within a production string of pipe in a well, and said source of gas being located at the upper end of the producing string and communicating with said jet pump through the annulus formed between said production string and said tubing.
Claim 6
Dependent Claim
40 words
The improved gas lift pump system as claimed in claim 1 wherein, said supplemental lift means further comprises, check valve means for preventing substantial flow of fluid from said tubing means above said check valve into said length of pipe.
Claim 7
Dependent Claim
33 words
The improved gas lift pump system as claimed in claim 5 wherein, said check valve comprises a ball check valve mounted in proximity to the point of suspension of said length of pipe.
Claim 8
Dependent Claim
41 words
The improved gas lift pump system as claimed in claim 1 further including, a side wall packer means mounted between said production string and said tubIng for forcing the gas from said source of gas to flow into said jet pump.
Claim 9
Dependent Claim
47 words
The improved gas lift pump system as claimed in claim 11 further including, supplemental check valve means for preventing the backward flow of fluid during the initial actuation of the system, and said supplemental check valve means being located in said tubing below said jet pump means.
Claim 10
Dependent Claim
45 words
The improved gas lift pump system as claimed in claim 1 further including, separator means for separating the gas from said fluid after said fluid is raised to the top of the tubing, and pump means for recirculating the separated gas for pumping additional fluid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |