US3809162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oversize subsurface tubing pump installation and method of retrieving the pump
Assignee: OILWELL Inc A CORP OF
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Filing: 1972-10-24
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Granted: 1974-05-07
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Expires: 1992-10-24
Abstract
Abstract An oversize subsurface tubing pump installation and method of retrieving the pump from a well. Both the pump barrel and plunger are too large to pass through the tubing. When the pump is to be retrieved, the sucker rods are raised and lift the seating assembly to expose a drain hole in the seating nipple. Fluid drains from the tubing through the exposed drain hole. Continued raising of the sucker rods breaks the connection between the sucker rods and pump plunger. The sucker rods and then the tubing and pump are pulled from the well. Draining the tubing prevents spillage at the top of the well.
Inventors
- 👤 M Sydor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:41
CPC Classifications
E; E21; E21B; E21B23/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
155 words
In an oversize subsurface pump installation which comprises a tubing, a seating nipple connected to the lower end of said tubing, a pump barrel connected to the lower end of said seating nipple, a plunger within said barrel, a seating assembly within said seating nipple and including a series of vertically spaced sealing rings around its circumference, a stem carried by said plunger and extending through said seating assembly, and a sucker rod string connected to said stem, both said barrel and said plunger being too large to pass through said tubing, the improvement in which said seating nipple has at least one drain hole, said sealing rings normally contact the inside face of said seating nipple both above and below said drain hole and prevent discharge of fluid therethrough, said seating assembly is movable to expose said drain hole and thereby drain the tubing when said pump barrel and plunger are to be retrieved.
Claim 2
Dependent Claim
155 words
In an oversize subsurface pump installation which comprises a tubing, a seating nipple connected to the lower end of said tubing, a pump barrel connected to the lower end of said seating nipple, a plunger within said barrel, a seating assembly within said seating nipple and including a series of vertically spaced sealing rings around its circumference, a stem carried by said plunger and extending through said seating assembly, and a sucker rod string connected to said stem, both said barrel and said plunger being too large to pass through said tubing, the improvement in which said seating nipple has at least one drain hole, said sealing rings normally contact the inside face of said seating nipple both above and below said drain hole and prevent discharge of fluid therethrough, said seating assembly is movable to expose said drain hole and thereby drain the tubing when said pump barrel and plunger are to be retrieved.
Claim 3
Dependent Claim
38 words
An installation as defined in claim 1 in which said plunger is engageable with said seating assembly when raised above its normal stroke level to lift said seating assembly above said drain hole and expose said drain hole.
Claim 4
Dependent Claim
25 words
An installation as defined in claim 2 including means for disconnecting said sucker rod string from said stem when said sucker rod string is raised.
Claim 5
Dependent Claim
51 words
An installation as defined in claim 3 including a cup on the upper end of said stem, an adapter on the lower end of said sucker rod string to be received in said cup and attached thereto on relative rotation, and a clutch connection between said cup and said seating assembly.
Claim 6
Dependent Claim
32 words
An installation as defined in claim 4 in which the means for disconnecting said sucker rod string from said stem includes a shear pin between said sucker rod string and said adapter.
Claim 7
Dependent Claim
32 words
An installation as defined in claim 1 in which the dimensions are proportioned so that said stem and said seating assembly collide whenever said sucker rods travel too far on a downstroke.
Claim 8
Dependent Claim
52 words
An installation as defined in claim 1 in which said seating nipple has at least one by-pass slot, at least one of said sealing rings normally contacting said seating nipple between said slot and said drain hole, but permitting communication therebetween when said seating assembly is moved to expose said drain hole.
Claim 9
Dependent Claim
100 words
In the operation of an oversize subsurface tubing pump, which has a barrel and plunger of a size too large to pass through the tubing, a method of retrieving said pump from a well, said method comprising exposing a drain hole located between said pump and said tubing when the sucker rods which operate the pump are raised above the upper limit which they reach during an upstroke and thereby draining the tubing through said drain hole, breaking the connection between the sucker rods and pump on continued raising of said sucker rods, and thereafter pulling said tubing and pump.
Claim 10
Dependent Claim
100 words
In the operation of an oversize subsurface tubing pump, which has a barrel and plunger of a size too large to pass through the tubing, a method of retrieving said pump from a well, said method comprising exposing a drain hole located between said pump and said tubing when the sucker rods which operate the pump are raised above the upper limit which they reach during an upstroke and thereby draining the tubing through said drain hole, breaking the connection between the sucker rods and pump on continued raising of said sucker rods, and thereafter pulling said tubing and pump.
References Cited (Backward Citations)
US3461958A
Cited
US3712376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |