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US3640342A
Expired / Lapsed
US
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Oil well pumping unit having traveling stuffing box
Assignee: Bethlehem Steel Corp
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Filing: 1970-09-04
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Granted: 1972-02-08
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Expires: 1990-09-04
Abstract
Abstract An efficient long-stroke pumping apparatus for oil wells. This apparatus comprises the combination of a low and relatively inexpensive supporting structure, an upright stroking wheel or sheave mounted thereon and driven near the ground level, and below-ground counterweight and traveling-seal means for actuating a pumping string. Said seal means reciprocate vertically in a polished pipe fixed within the well tubing, and provide protection against corrosive well fluids to the pumping cable actuated by the stroking wheel.
Inventors
- 👤 Robert H Gault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:28
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; E; E21; E21B; E21B33/00; E21B33/02; E21B33/08; F04B53/00; F04B53/14; F04B53/144
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
In a pumping unit for an oil well, the combination comprising: a. casing in said well, b. tubing suspended in said casing in said well, c. a base adjacent to said well, d. an upright stroking wheel mounted on said base, e. reversible means for reciprocating the stroking wheel, f. first and second flexible members fastened to said wheel and trained in opposite directions over said wheel, g. counterbalance means connected to said first flexible member, h. an underground chamber receiving said counterbalance means, i. a vertical pipe having an interiorly polished surface within said tubing but sealed therefrom, j. a traveling stuffing box within said interiorly polished pipe and suspended from said second flexible member, and k. a string of pumping members connected to the lower end of said traveling stuffing box.
Claim 2
Dependent Claim
133 words
In a pumping unit for an oil well, the combination comprising: a. casing in said well, b. tubing suspended in said casing in said well, c. a base adjacent to said well, d. an upright stroking wheel mounted on said base, e. reversible means for reciprocating the stroking wheel, f. first and second flexible members fastened to said wheel and trained in opposite directions over said wheel, g. counterbalance means connected to said first flexible member, h. an underground chamber receiving said counterbalance means, i. a vertical pipe having an interiorly polished surface within said tubing but sealed therefrom, j. a traveling stuffing box within said interiorly polished pipe and suspended from said second flexible member, and k. a string of pumping members connected to the lower end of said traveling stuffing box.
Claim 3
Dependent Claim
256 words
In a pumping unit for an oil well, the combination comprising: a. casing in said well, b. a string of well tubing suspended at the top from said casing surmounted by a head member, c. a skid base adjacent said wellhead member, d. a reversible prime mover and a speed reducer mounted on said skid base, e. an upright supporting frame also mounted on said skid base, f. a pair of aligned bearing means on said supporting frame, g. a shaft journaled in said bearing means and operatively connected through the gear reducer to the prime mover, h. a stroking wheel carried by said shaft, i. a pair of flexible members fastened to said wheel and trained in opposite directions over said wheel, j. the first such flexible member having a free end, k. a counterweight attached to said free end, l. an underground chamber receiving said counterweight in the lowered portion of its stroke, m. the second flexible member also having a free end, n. a vertical pipe having a polished inner surface, o. said pipe means being fastened concentrically within the well tubing and extending downwardly in spaced sealed relation therein, p. a traveling stuffing box with fluidtight packing means sealing off said pipe from ascending well fluid, q. the free end of the second flexible member connected to the upper end of said traveling stuffing box, r. a string of pumping members connected to the lower end of said traveling stuffing box, and s. means for separately discharging the well fluid as pumped.
Claim 4
Dependent Claim
256 words
In a pumping unit for an oil well, the combination comprising: a. casing in said well, b. a string of well tubing suspended at the top from said casing surmounted by a head member, c. a skid base adjacent said wellhead member, d. a reversible prime mover and a speed reducer mounted on said skid base, e. an upright supporting frame also mounted on said skid base, f. a pair of aligned bearing means on said supporting frame, g. a shaft journaled in said bearing means and operatively connected through the gear reducer to the prime mover, h. a stroking wheel carried by said shaft, i. a pair of flexible members fastened to said wheel and trained in opposite directions over said wheel, j. the first such flexible member having a free end, k. a counterweight attached to said free end, l. an underground chamber receiving said counterweight in the lowered portion of its stroke, m. the second flexible member also having a free end, n. a vertical pipe having a polished inner surface, o. said pipe means being fastened concentrically within the well tubing and extending downwardly in spaced sealed relation therein, p. a traveling stuffing box with fluidtight packing means sealing off said pipe from ascending well fluid, q. the free end of the second flexible member connected to the upper end of said traveling stuffing box, r. a string of pumping members connected to the lower end of said traveling stuffing box, and s. means for separately discharging the well fluid as pumped.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |