Patent US5062480A successfully refreshed from Google Patents.
US5062480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self actuated intake valve assembly for insert subsurface reciprocating pumps
Assignee: Intevep SA
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Filing: 1990-10-11
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Granted: 1991-11-05
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Expires: 2010-10-11
Abstract
Abstract The present invention is drawn to an inlet valve assembly for a subsurface sucker rod operated reciprocating piston pump and, more particularly an inlet valve assembly which is locked in its closed position when the pump is in its unanchored, non-pumping position within the production tube of a deep well. When the subsurface piston pump is anchored within the production tube of the deep well of the inlet valve assembly is freely movable between open and close positions upon reciprocation of the piston.
Inventors
- 👤 Jesus E. Chacin U.
- 👤 Amnon M. Vadasz F.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:35
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; E; E21; E21B; E21B34/00; E21B34/06; E21B34/12; F04B47/00; F04B47/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
196 words
In a deep well having a production tube and a sucker rod operated reciprocating subsurface pump which is selectively positioned between a first position wherein said pump is anchored in said production tube for pumping fluid from the well and a second position wherein said pump is unanchored in said production tube for non-pumping operations wherein said pump comprises a pump barrel having first valve seat defining an inlet port and a second valve seat defining an outlet port, an inlet valve for selectively sealing said inlet port and an outlet valve for selectively sealing said outlet port and a plunger reciprocally mounted within said pump barrel for pumping fluid from said inlet port to said outlet port, the improvement which comprises said inlet valve includes means for locking said inlet valve against said inlet port for sealing same against pressure downhole in the well when said pump is in said second position so as to prohibit passage of fluid into said pump barrel and unlocking said inlet valve so as to allow for selective sealing and unsealing of the inlet port when said pump is in said first position for pumping fluid from said well.
Claim 2
Dependent Claim
196 words
In a deep well having a production tube and a sucker rod operated reciprocating subsurface pump which is selectively positioned between a first position wherein said pump is anchored in said production tube for pumping fluid from the well and a second position wherein said pump is unanchored in said production tube for non-pumping operations wherein said pump comprises a pump barrel having first valve seat defining an inlet port and a second valve seat defining an outlet port, an inlet valve for selectively sealing said inlet port and an outlet valve for selectively sealing said outlet port and a plunger reciprocally mounted within said pump barrel for pumping fluid from said inlet port to said outlet port, the improvement which comprises said inlet valve includes means for locking said inlet valve against said inlet port for sealing same against pressure downhole in the well when said pump is in said second position so as to prohibit passage of fluid into said pump barrel and unlocking said inlet valve so as to allow for selective sealing and unsealing of the inlet port when said pump is in said first position for pumping fluid from said well.
Claim 3
Dependent Claim
29 words
A system according to claim 1 wherein said production tube includes a seating nipple for anchoring said pump within said production tube when in said first fluid pumping position.
Claim 4
Dependent Claim
24 words
A system according to claim 2 wherein said means for locking includes biasing means for mechanically biasing said inlet valve against said inlet port.
Claim 5
Dependent Claim
44 words
A system according to claim 3 wherein said biasing means includes a collar which surrounds a portion of said inlet valve and spring means located between said valve seat and said collar for locking said inlet valve against said inlet port for sealing same.
Claim 6
Dependent Claim
36 words
A system according to claim 4 wherein said collar includes an abutment means for abutting said seating nipple when said pump is in said first position for compressing said spring means and unlocking said inlet valve.
Claim 7
Dependent Claim
27 words
A system according to claim 5 wherein a hollow extension is located upstream of said inlet port and said collar is biasly mounted within said hollow extension.
Claim 8
Dependent Claim
29 words
A system according to claim 6 wherein the hollow extension is provided with sealing means for sealing said pump in said first anchored pumping position within said sealing nipple.
Claim 9
Dependent Claim
35 words
A system according to claim 4 wherein said inlet valve comprises a first portion for sealing said inlet valve port and a second portion spaced from said first portion which is surrounded by said collar.
Claim 10
Dependent Claim
42 words
A system according to claim 1 wherein said sucker rod and said pump barrel are provided with engagement means for selectively fixing said pump barrel to said sucker rod for selectively positioning said pump between said first position and said second position.
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) | 1994-11-04 | 1995-05-06 | 1995-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-04 | 1999-05-06 | 1999-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-04 | 2003-05-06 | 2003-11-05 | $7700.00 | Window Closed / Lapsed |