Patent US3850241A successfully refreshed from Google Patents.
US3850241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure jet well cleaning
Assignee: Chevron USA Inc
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Filing: 1973-07-10
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Granted: 1974-11-26
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Expires: 1993-07-10
Abstract
Abstract Method and apparatus for directionally applying high pressure jets to well liners to clean openings which are plugged with foreign matter. High velocity jets of liquid having a velocity in excess of 700 feet per second are jetted from jet orifices having a standoff distance between 5 and 10 diameters of the orifice from the openings to remove substantially all plugging material from the openings. Apparatus for circulating foam is provided in combination with apparatus for delivering high pressure jets. New swivels and check valves permit rotation and reciprocation of the jet tool and tubing string while maintaining high pressure in the apparatus.
Inventors
- 👤 S Hutchinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:27
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
190 words
Apparatus for jet washing a well liner positioned in a well comprising first tubing means forming a well flow path from the earth''s surface to a location adjacent a well liner positioned in a well, a source of high pressure liquid for supplying-liquid at pressures in excess of 6,000 psi, conduit means connecting said source of high pressure liquid to said first tubing means and jet tool means for jetting said high pressure liquid at said well liner, said jet tool means comprising an inner tubular member connected to the lower end of said first tubing means and having at least one hole in the wall therEof, a jet seat member fixedly connected to said inner tubular member, said jet seat member having a central internally threaded opening aligned with said hole and an externally threaded jet body having a central opening of no greater than 1/16th inch in diameter formed therein threadably engaged in said jet seat member, the internal threads and the external threads being mateable whereby said jet body may be rotated to provide axial movement of said jet body with respect to said jet seat member.
Claim 2
Dependent Claim
190 words
Apparatus for jet washing a well liner positioned in a well comprising first tubing means forming a well flow path from the earth''s surface to a location adjacent a well liner positioned in a well, a source of high pressure liquid for supplying-liquid at pressures in excess of 6,000 psi, conduit means connecting said source of high pressure liquid to said first tubing means and jet tool means for jetting said high pressure liquid at said well liner, said jet tool means comprising an inner tubular member connected to the lower end of said first tubing means and having at least one hole in the wall therEof, a jet seat member fixedly connected to said inner tubular member, said jet seat member having a central internally threaded opening aligned with said hole and an externally threaded jet body having a central opening of no greater than 1/16th inch in diameter formed therein threadably engaged in said jet seat member, the internal threads and the external threads being mateable whereby said jet body may be rotated to provide axial movement of said jet body with respect to said jet seat member.
Claim 3
Dependent Claim
223 words
Apparatus for jet washing a well liner positioned in a well comprising first tubing means forming a well flow path from the earth''s surface to a location adjacent a well liner positioned in a well, a source of high pressure liquid for supplying liquid at pressures in excess of 6,000 psi, conduit means connecting said source of high pressure liquid to said first tubing means and jet tool means for jetting said high pressure liquid at said well liner, said jet tool means comprising an inner tubular member connected to the lower end of said first tubing means and having a hole in the side wall thereof, a jet seat member fixedly connected to said first tubular member and having a central internally threaded opening positioned over said hole, a second outside tubular member concentrically arranged around said first tubular member having a hole coaxially aligned with the hole in said first tubular member, means connecting said second tubular member to said jet seat member and an externally threaded jet body having a central opening of no greater than 1/16th inch in diameter formed therein threadably engaged in said jet seat member, the internal threads and the external threads being mateable whereby said jet body may be rotated to cause axial movement of said jet body with respect to said jet seat member.
Claim 4
Dependent Claim
223 words
Apparatus for jet washing a well liner positioned in a well comprising first tubing means forming a well flow path from the earth''s surface to a location adjacent a well liner positioned in a well, a source of high pressure liquid for supplying liquid at pressures in excess of 6,000 psi, conduit means connecting said source of high pressure liquid to said first tubing means and jet tool means for jetting said high pressure liquid at said well liner, said jet tool means comprising an inner tubular member connected to the lower end of said first tubing means and having a hole in the side wall thereof, a jet seat member fixedly connected to said first tubular member and having a central internally threaded opening positioned over said hole, a second outside tubular member concentrically arranged around said first tubular member having a hole coaxially aligned with the hole in said first tubular member, means connecting said second tubular member to said jet seat member and an externally threaded jet body having a central opening of no greater than 1/16th inch in diameter formed therein threadably engaged in said jet seat member, the internal threads and the external threads being mateable whereby said jet body may be rotated to cause axial movement of said jet body with respect to said jet seat member.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |