US3753628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary type oil or water pump
Assignee: Individual
•
Filing: 1972-05-15
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Granted: 1973-08-21
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Expires: 1992-05-15
Abstract
Abstract This invention relates to a rotary type oil or water pump in which a convoluted stator is provided in which a helical screw rotor operates to force liquid to the surface. I provide a pump in which pump failures are reduced due to preventing the accumulation of fine sand or silt in the pump by providing a spring-pressed check valve which automatically opens to eject sand or silt when excessive weight of this accumulation bears against a check valve. I also provide a means of raising or lowering the pump and the operating parts thereof by a single run of the pump either into or out of the well.
Inventors
- 👤 J Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:03
CPC Classifications
F; F04; F04C; F04C13/00; F04C13/008; F04C13/001; F04C13/002
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
A rotary type fluid pump for fluids containing sand comprising a sleeve, means non-rotatably mounting said sleeve in a well, a pump in said sleeve including a rotor and a stator, a tubing rising from the pump, said tubing forming a portion of said rotor and receiving pumped fluid therethrough, means releasably coupling the tubing and the sleeve, said pump having a sump therein, and a check valve in said sump.
Claim 2
Dependent Claim
71 words
A rotary type fluid pump for fluids containing sand comprising a sleeve, means non-rotatably mounting said sleeve in a well, a pump in said sleeve including a rotor and a stator, a tubing rising from the pump, said tubing forming a portion of said rotor and receiving pumped fluid therethrough, means releasably coupling the tubing and the sleeve, said pump having a sump therein, and a check valve in said sump.
Claim 3
Dependent Claim
40 words
A rotary type fluid pump for fluids as recited in claim 1, and said releasable means coupling the tubing and the sleeve consisting of a pin on the tubing and a J slot in the sleeve engagable by the pin.
Claim 4
Dependent Claim
21 words
A rotary type fluid pump for fluids as recited in claim 1, and said check valve including a spring pressed ball.
Claim 5
Dependent Claim
49 words
A rotary type fluid pump for fluids as recited in claim 1, and said releasable means coupling the tubing and the sleeve consisting of a pin on the tubing and a J slot in the sleeve engagable by the pin, and said check valve including a spring pressed ball.
Claim 6
Dependent Claim
32 words
A rotary type fluid pump for fluids as recited in claim 1, and said sump being positioned in the bottom of the sleeve to receive the upwardly flowing fluid in the pump.
Claim 7
Dependent Claim
43 words
A rotary type fluid pump for fluids as recited in claim 1, and said sump being positioned in the bottom of the sleeve to receive the upwardly flowing fluid in the pump, and a check valve means in the bottom of said sump.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |