Patent US3811499A successfully refreshed from Google Patents.
US3811499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure jet well cleaning
Assignee: Chevron USA Inc
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Filing: 1972-07-24
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Granted: 1974-05-21
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Expires: 1992-07-24
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 Hutchison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:41
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/14; E21B37/00; E21B37/08; E21B41/00; E21B41/0078
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
285 words
Apparatus for jet washing a well liner positioned adjacent a fluid producing formation to clean openings in said liner comprising first tubing means forming a well flow path from the earth''s surface to a location adjacent a well liner positioned adjacent a fluid producing formation, a source of high pressure liquid, rotating swivel means rotatably connected on said tubing means adapted to be positioned above the earth''s surface, said rotating swivel means comprising a housing member having a central opening through its entire length, a tubular mandril having a central flow opening through its entire length positioned in the central opening of said housing member, means closing off the flow path at the upper end of said tubular mandril, means rotatably mounting said mandril in said central opening of said housing member, an opening intermediate the ends of said mandril forming a flow path from the outside of said mandril to the central flow opening of said mandril, port means forming a flow path through said housing member communicating with the opening intermediate the ends of said mandril, a conduit connected between said source of high pressure liquid and the port means of said housing member and jet tool means connected to the end of said first tubing means and adapted to be positioned adjacent said liner for jetting said high pressure liquid at openings in said well liner, said jet tool means including a jet body having a central opening formed therethrough for forming a jet having a diameter of less than 1/8 inch and said jet tool means being formed to provide a standoff distance between said jet body and said well liner of less than 10 times the diameter of said jet.
Claim 2
Dependent Claim
285 words
Apparatus for jet washing a well liner positioned adjacent a fluid producing formation to clean openings in said liner comprising first tubing means forming a well flow path from the earth''s surface to a location adjacent a well liner positioned adjacent a fluid producing formation, a source of high pressure liquid, rotating swivel means rotatably connected on said tubing means adapted to be positioned above the earth''s surface, said rotating swivel means comprising a housing member having a central opening through its entire length, a tubular mandril having a central flow opening through its entire length positioned in the central opening of said housing member, means closing off the flow path at the upper end of said tubular mandril, means rotatably mounting said mandril in said central opening of said housing member, an opening intermediate the ends of said mandril forming a flow path from the outside of said mandril to the central flow opening of said mandril, port means forming a flow path through said housing member communicating with the opening intermediate the ends of said mandril, a conduit connected between said source of high pressure liquid and the port means of said housing member and jet tool means connected to the end of said first tubing means and adapted to be positioned adjacent said liner for jetting said high pressure liquid at openings in said well liner, said jet tool means including a jet body having a central opening formed therethrough for forming a jet having a diameter of less than 1/8 inch and said jet tool means being formed to provide a standoff distance between said jet body and said well liner of less than 10 times the diameter of said jet.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1 further characterized by adjustable jet body means in said jet tool means.
Claim 4
Dependent Claim
41 words
The apparatus of claim 1 further characterized in that the tool area of the opening in said tubing means is at least as large as the cross-sectional interior flow area of the well flow path formed inside said first tubing means.
Claim 5
Dependent Claim
191 words
Apparatus for jet washing a well liner positioned adjacent a fluid producing formation to clean openings in said liner comprising first tubing means forming a well flow path from the earth''s surface to a location adjacent a well liner positioned adjacent a fluid producing formation, a source of high pressure liquid, rotating swivel means rotatably connected on said tubing means adapted to be positioned above the earth''s surface, a flow path through said rotating swivel, an opening in said tubing means communicating with said flow path in said rotating swivel, conduit means connecting the flow path in said rotating swivel with said source of high pressure liquid, a jet tool means connected to the end of said tubing means adapted to be positioned adjacent said liner for jetting said high pressure liquid at openings in said well liner, a second tubing means arranged concentrically around said first tubing means, said second tubing means extending from the earth''s surface below said rotating swivel to a location adjacent said liner in said well below said jet tool means, a foam source and conduit means connecting said foam source with said second tubing means.
Claim 6
Dependent Claim
191 words
Apparatus for jet washing a well liner positioned adjacent a fluid producing formation to clean openings in said liner comprising first tubing means forming a well flow path from the earth''s surface to a location adjacent a well liner positioned adjacent a fluid producing formation, a source of high pressure liquid, rotating swivel means rotatably connected on said tubing means adapted to be positioned above the earth''s surface, a flow path through said rotating swivel, an opening in said tubing means communicating with said flow path in said rotating swivel, conduit means connecting the flow path in said rotating swivel with said source of high pressure liquid, a jet tool means connected to the end of said tubing means adapted to be positioned adjacent said liner for jetting said high pressure liquid at openings in said well liner, a second tubing means arranged concentrically around said first tubing means, said second tubing means extending from the earth''s surface below said rotating swivel to a location adjacent said liner in said well below said jet tool means, a foam source and conduit means connecting said foam source with said second tubing means.
Claim 7
Dependent Claim
44 words
The apparatus of claim 4 further characterized by foam swivel means rotatably mounted on said second tubing means, means forming a foam opening in said foam swivel and an opening in said second tubing means communicating with the foam opening in said foam swivel.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |