US4332296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well cleaning tool
Assignee: Individual
•
Filing: 1980-08-01
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Granted: 1982-06-01
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Expires: 2000-08-01
Abstract
Abstract A liner cleaning tooling comprising an elongate vertically extending cylindrical body, coupling means at the upper end of the body to connect with a fluid conducting run-in pipe string, a central longitudinal flow passage in the body communicating with the pipe string and opening downwardly, an enlarged, central, axially extending cylindrical chamber in the body between the upper and lower end portions of the flow passage, a plurality of circumferentially spaced ball receiving openings in the body communicating between the exterior of the body and the chamber, an elongate axially shiftable mandrel with a downward and radially inwardly convergent conical surface slidably engaged in the chamber and having a central longitudinal fluid conducting opening, a helical compression spring in the chamber above the mandrel and engaging and normally yieldingly urging the mandrel downwardly and a ball rotatably and axially shiftably arranged in each opening and having an outer liner engaging portion projecting radially outwardly from the body and an inner portion projecting radially inwardly into the chamber and engaging the mandrel.
Inventors
- 👤 Newell E. Wayt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:40
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02; E21B37/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
171 words
A liner cleaning tool comprising an elongate vertically extending cylindrical body, coupling means at the upper end of the body to connect with a fluid conducting run-in pipe string, a central longitudinal flow passage in the body communicating with the pipe string and opening downwardly, an enlarged, central, axially extending cylindrical chamber in the body between the upper and lower end portions of the flow passage, a plurality of circumferentially spaced ball receiving openings in the body communicating between the exterior of the body and the chamber, an elongate axially shiftable mandrel with a downward and radially inwardly convergent conical surface slidably engaged in the chamber and having a central longitudinal fluid conducting opening, a helical compression spring in the chamber above the mandrel and engaging and normally yieldingly urging the mandrel downwardly and a ball rotatably and axially shiftably arranged in each opening and having an outer liner engaging portion projecting radially outwardly from the body and an inner portion projecting radially inwardly into the chamber and engaging the mandrel.
Claim 2
Dependent Claim
171 words
A liner cleaning tool comprising an elongate vertically extending cylindrical body, coupling means at the upper end of the body to connect with a fluid conducting run-in pipe string, a central longitudinal flow passage in the body communicating with the pipe string and opening downwardly, an enlarged, central, axially extending cylindrical chamber in the body between the upper and lower end portions of the flow passage, a plurality of circumferentially spaced ball receiving openings in the body communicating between the exterior of the body and the chamber, an elongate axially shiftable mandrel with a downward and radially inwardly convergent conical surface slidably engaged in the chamber and having a central longitudinal fluid conducting opening, a helical compression spring in the chamber above the mandrel and engaging and normally yieldingly urging the mandrel downwardly and a ball rotatably and axially shiftably arranged in each opening and having an outer liner engaging portion projecting radially outwardly from the body and an inner portion projecting radially inwardly into the chamber and engaging the mandrel.
Claim 3
Dependent Claim
41 words
A structure as set forth in claim 1 wherein the upper end portion of the body has a radially inwardly and upwardly inclined guide surface and the lower portion of the body has a radially inwardly and downwardly inclined guide surface.
Claim 4
Dependent Claim
74 words
A structure as set forth in claim 1 wherein said body has an axial guide bore continuing downwardly from the lower end of the chamber and terminating as a flat bottom, said mandrel has a cylindrical extension with a flat bottom end at the lower end slidably engaged in said bore and an annular spacer ring at the bottom of the bore to be engaged by and to limit downward movement of the mandrel.
Claim 5
Dependent Claim
106 words
A structure as set forth in claim 1 wherein the upper end portion of the body has a radially inwardly and upwardly inclined guide surface and the lower portion of the body has a radially inwardly and downwardly inclined guide surface, said body has an axial guide bore continuing downwardly from the lower end of the chamber and terminating at a flat bottom, said mandrel has a cylindrical extension with a flat bottom end at the lower end slidably engaged in said bore and an annular spacer ring at the bottom of the bore to be engaged by and to limit downward movement of the mandrel.
Claim 6
Dependent Claim
36 words
A structure as set forth in claim 1 including radially inwardly and axially outwardly inclined stop surfaces about the outer ends of the ball receiving openings to stop and limit radial outward shifting of the balls.
Claim 7
Dependent Claim
68 words
A structure as set forth in claim 1 wherein the upper end portion of the body has a radially inwardly and upwardly inclined guide surface and the lower portion of the body has a radially inwardly and downwardly inclined guide surface, radially inwardly and axially outwardly inclined stop surfaces about the outer ends of the ball receiving openings to stop and limit radial outward shifting of the balls.
Claim 8
Dependent Claim
101 words
A structure as set forth in claim 1 wherein said body has an axial guide bore continuing downwardly from the lower end of the chamber and terminating at a flat bottom, said mandrel has a cylindrical extension with a flat bottom end at the lower end slidably engaged in said bore and an annular spacer ring at the bottom of the bore to be engaged by and to limit downward movement of the mandrel, radially inwardly and axially outwardly inclined stop surfaces about the outer ends of the ball receiving openings to stop and limit radial outward shifting of the balls.
Claim 9
Dependent Claim
133 words
A structure as set forth in claim 1 wherein the upper end portion of the body has a radially inwardly and upwardly inclined guide surface and the lower portion of the body has a radially inwardly and downwardly inclined guide surface, said body has an axial guide bore continuing downwardly from the lower end of the chamber and terminating at a flat bottom, said mandrel has a cylindrical extension with a flat bottom end at the lower end slidably engaged in said bore and an annular spacer ring at the bottom of the bore to be engaged by and to limit downward movement of the mandrel, radially inwardly and axially outwardly inclined stop surfaces about the outer ends of the ball receiving openings to stop and limit radial outward shifting of the balls.
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) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |