Patent US4113010A successfully refreshed from Google Patents.
US4113010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casing stop for well tools and an insertion device therefore
Assignee: GRAMLING ENGINEERING CORP
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Filing: 1977-04-19
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Granted: 1978-09-12
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Expires: 1997-04-19
Abstract
Abstract A well anchor for use in a cased well having anchor members of bowed springs and a vertically reciprocable rod actuator movable from the surface to set the anchor.
Inventors
- 👤 William Dwight Gramling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:19
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
171 words
Means for positioning and ejecting a restricting stop in well casing, said means comprising a vertically oriented body open at the lower end, fittings slidable on lower end of said body, said fittings provided with resilient tabs held against and slidable on said casing, said fittings attached to said body, a vertically positioned rod attached to the top of and projecting through said open lower end of said body, a downwardly facing semi-circle of resilient bar compressed and slidable on said rod, said fittings remaining stationary relative to said body during downward movement of said ejecting means relative to said casing, said fittings remaining stationary relative to said casing and moving downward relative to said body during upward movement of said ejecting means relative to said casing, said downward movement of fittings relative to said body causing downward movement of said bar relative to said rod, said bar becoming ejected from said ejecting means, said bar contacting said well casing and becoming stationary in said well casing at a predetermined depth.
Claim 2
Dependent Claim
171 words
Means for positioning and ejecting a restricting stop in well casing, said means comprising a vertically oriented body open at the lower end, fittings slidable on lower end of said body, said fittings provided with resilient tabs held against and slidable on said casing, said fittings attached to said body, a vertically positioned rod attached to the top of and projecting through said open lower end of said body, a downwardly facing semi-circle of resilient bar compressed and slidable on said rod, said fittings remaining stationary relative to said body during downward movement of said ejecting means relative to said casing, said fittings remaining stationary relative to said casing and moving downward relative to said body during upward movement of said ejecting means relative to said casing, said downward movement of fittings relative to said body causing downward movement of said bar relative to said rod, said bar becoming ejected from said ejecting means, said bar contacting said well casing and becoming stationary in said well casing at a predetermined depth.
Claim 3
Dependent Claim
28 words
Means in accordance with claim 1 wherein an open-ended enclosure extends from the lowermost portion of said body, said enclosure to contain and compress said bar until ejection.
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) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |