US3887196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self aligning stuffing box
Assignee: Individual
•
Filing: 1973-10-09
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Granted: 1975-06-03
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Expires: 1993-10-09
Abstract
Abstract In a combination of an oil well pumping unit with sucker rods and the like, a self aligning stuffing box and well head seal to accommodate misalignment of the rods and tubing. The self aligning stuffing box structure includes a body member on a well tubing and a rod guide member mounted on the body member for limited universal movement. A guide extension is on the rod guide member and has a bore and an enlarged chamber. A rod extends through the guide extension bore and chamber, guide member, and body member into the oil well. Packing or seals in the guide extension sealingly engages the rod above and below the chamber to provide operative seals. Pressure sensitive members communicate with the guide member below the packing or seals therein to indicate fluid pressure in the chamber. Liquid pressure responsive structure communicates with the chamber and provides a signal in the event liquid accumulates in the chamber above a predetermined pressure; as by flowing through the packing or seals below the chamber.
Inventors
- 👤 William Neil Renfrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:47
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/187; E; E21; E21B; E21B33/00; E21B33/02; E21B33/08; F04; F04B; F04B53/00; F04B53/16; F04B53/162; F04B53/164; F16J15/002; F16J15/004; F04B2201/00; F04B2201/02; F04B2201/0208; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631; Y10T403/32681; Y10T403/32704
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
371 words
A self aligning well head structure for use with an oil well tubing and a pumping unit reciprocating a polished rod extending into the well tubing and connected to a string of sucker rods, said self aligning well head structure comprising: a. a body member having walls defining a cavity adapted to receive a portion of a sphere; b. a tubular portion extending from said body member and having a side wall and an end wall with a bore therethrough, said tubular portion having a recess coaxial with said bore and communicating with the cavity in said body member, said tubular portion of said body member being adapted to be mounted on an oil well christmas tree; c. a tubular bushing member having opposite ends and positioned in said tubular portion of said body member and having one end thereof in engagement with the end wall of said tubular portion and a side wall defining a bore adapted to slidingly receive an oil well polished rod during reciprocable movement thereof, said tubular bushing member being smaller than said recess for limited lateral movement of said bushing member and oil well polished rod; d. a rod guide member having a generally spherical end portion received in the cavity in said body member and an elongated tubular portion extending from the spherical end portion and having a side wall defining a bore therethrough, said spherical end portion engaging the other end of said bushing member and having a bore therethrough communicating with and coaxial with the bore through the tubular portion of said rod guide member, said bores through the tubular portion of the body member and through the spherical end portion and tubular portion of the rod guide member being larger than the polished rod providing a clearance greater than the limited lateral movement of said bushing member and polished rod; e. a retainer mounted on said body member and having walls engaging said spherical end portion of said rod guide member for retaining same in the cavity in said body member; and f. seal means mounted on said tubular portion of said rod guide member and adapted to slidingly and sealingly engage the oil well polished rod during reciprocable movement thereof.
Claim 2
Dependent Claim
371 words
A self aligning well head structure for use with an oil well tubing and a pumping unit reciprocating a polished rod extending into the well tubing and connected to a string of sucker rods, said self aligning well head structure comprising: a. a body member having walls defining a cavity adapted to receive a portion of a sphere; b. a tubular portion extending from said body member and having a side wall and an end wall with a bore therethrough, said tubular portion having a recess coaxial with said bore and communicating with the cavity in said body member, said tubular portion of said body member being adapted to be mounted on an oil well christmas tree; c. a tubular bushing member having opposite ends and positioned in said tubular portion of said body member and having one end thereof in engagement with the end wall of said tubular portion and a side wall defining a bore adapted to slidingly receive an oil well polished rod during reciprocable movement thereof, said tubular bushing member being smaller than said recess for limited lateral movement of said bushing member and oil well polished rod; d. a rod guide member having a generally spherical end portion received in the cavity in said body member and an elongated tubular portion extending from the spherical end portion and having a side wall defining a bore therethrough, said spherical end portion engaging the other end of said bushing member and having a bore therethrough communicating with and coaxial with the bore through the tubular portion of said rod guide member, said bores through the tubular portion of the body member and through the spherical end portion and tubular portion of the rod guide member being larger than the polished rod providing a clearance greater than the limited lateral movement of said bushing member and polished rod; e. a retainer mounted on said body member and having walls engaging said spherical end portion of said rod guide member for retaining same in the cavity in said body member; and f. seal means mounted on said tubular portion of said rod guide member and adapted to slidingly and sealingly engage the oil well polished rod during reciprocable movement thereof.
Claim 3
Dependent Claim
371 words
A self aligning well head structure for use with an oil well tubing and a pumping unit reciprocating a polished rod extending into the well tubing and connected to a string of sucker rods, said self aligning well head structure comprising: a. a body member having walls defining a cavity adapted to receive a portion of a sphere; b. a tubular portion extending from said body member and having a side wall and an end wall with a bore therethrough, said tubular portion having a recess coaxial with said bore and communicating with the cavity in said body member, said tubular portion of said body member being adapted to be mounted on an oil well christmas tree; c. a tubular bushing member having opposite ends and positioned in said tubular portion of said body member and having one end thereof in engagement with the end wall of said tubular portion and a side wall defining a bore adapted to slidingly receive an oil well polished rod during reciprocable movement thereof, said tubular bushing member being smaller than said recess for limited lateral movement of said bushing member and oil well polished rod; d. a rod guide member having a generally spherical end portion received in the cavity in said body member and an elongated tubular portion extending from the spherical end portion and having a side wall defining a bore therethrough, said spherical end portion engaging the other end of said bushing member and having a bore therethrough communicating with and coaxial with the bore through the tubular portion of said rod guide member, said bores through the tubular portion of the body member and through the spherical end portion and tubular portion of the rod guide member being larger than the polished rod providing a clearance greater than the limited lateral movement of said bushing member and polished rod; e. a retainer mounted on said body member and having walls engaging said spherical end portion of said rod guide member for retaining same in the cavity in said body member; and f. seal means mounted on said tubular portion of said rod guide member and adapted to slidingly and sealingly engage the oil well polished rod during reciprocable movement thereof.
Claim 4
Dependent Claim
371 words
A self aligning well head structure for use with an oil well tubing and a pumping unit reciprocating a polished rod extending into the well tubing and connected to a string of sucker rods, said self aligning well head structure comprising: a. a body member having walls defining a cavity adapted to receive a portion of a sphere; b. a tubular portion extending from said body member and having a side wall and an end wall with a bore therethrough, said tubular portion having a recess coaxial with said bore and communicating with the cavity in said body member, said tubular portion of said body member being adapted to be mounted on an oil well christmas tree; c. a tubular bushing member having opposite ends and positioned in said tubular portion of said body member and having one end thereof in engagement with the end wall of said tubular portion and a side wall defining a bore adapted to slidingly receive an oil well polished rod during reciprocable movement thereof, said tubular bushing member being smaller than said recess for limited lateral movement of said bushing member and oil well polished rod; d. a rod guide member having a generally spherical end portion received in the cavity in said body member and an elongated tubular portion extending from the spherical end portion and having a side wall defining a bore therethrough, said spherical end portion engaging the other end of said bushing member and having a bore therethrough communicating with and coaxial with the bore through the tubular portion of said rod guide member, said bores through the tubular portion of the body member and through the spherical end portion and tubular portion of the rod guide member being larger than the polished rod providing a clearance greater than the limited lateral movement of said bushing member and polished rod; e. a retainer mounted on said body member and having walls engaging said spherical end portion of said rod guide member for retaining same in the cavity in said body member; and f. seal means mounted on said tubular portion of said rod guide member and adapted to slidingly and sealingly engage the oil well polished rod during reciprocable movement thereof.
Claim 5
Dependent Claim
164 words
A self aligning well head structure as set forth in claim 1 including: a. tubular means mounted on said tubular portion of said rod guide member and engaging said seal means for defining a chamber surrounding the oil well polished rod during reciprocable movement thereof; b. means communicating with the chamber for detecting presence of and generating a signal in response to liquid flowing into the chamber from the bore of said rod guide member; and c. second seal means mounted on said means defining the chamber and spaced from said first named seal means and adapted to slidingly and sealingly engage the oil well polished rod during reciprocable movement thereof while sealing the chamber; d. said first named seal means and said second seal means being above the spherical end portion and said bushing member being below said spherical end portion with said first named seal means, second seal means and bushing member providing sliding engagement with and guiding of said polished rod.
Claim 6
Dependent Claim
71 words
A self aligning well head structure as set forth in claim 2 including: a. means on the side wall of said tubular portion of said rod guide member defining a recess theRein below said first named seal means; and b. means communicating with the recess in the side wall of said tubular portion of said rod guide member for generating a signal in response to fluid pressure above a selected level.
Claim 7
Dependent Claim
137 words
A self aligning well head structure as set forth in claim 1 wherein: a. said recess in said tubular portion of said body member is enlarged to define a shoulder adjacent to and spaced from the cavity in said body member; b. said bushing member has a flange in engagement with said shoulder; c. said spherical end portion of said rod guide member is in engagement with the flange on said bushing member; and d. said bushing member and said recess in said tubular portion of said body member having relative sizes to accommodate limited lateral movement of the oil well polished rod and retain same from engaging surfaces of the bores in the body member and rod guide member whereby the polish rod has sliding engagement and guiding support with the bushing member and seal means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |