US3079177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broken casing coupling means with removable inner guide and permanent overshot
Assignee: Jersey Production Research Co
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Filing: 1961-09-14
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Granted: 1963-02-26
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Expires: 1981-09-14
Abstract
No abstract record available.
Inventors
- 👤 James G Walvoord
- 👤 Vergil L Garlington
- 👤 George H Hacke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:46
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/10; E21B17/00; E21B17/02; E21B17/021; E21B17/10; E21B31/00; E21B31/12; E21B31/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
APPARATUS FOR CONNECTING TOGETHER UPPER AND LOWER PIPE STRING SECTIONS IN A BOREHOLE, COMPRISING: A TUBULAR EXTENSION MEMBER FOR SAID UPPER PIPE STRING SECTION HAVING AN INNER DIAMETER GREATER THAN THE OUTER DIAMETER OF SAID LOWER PIPE STRING SECTION; GRAPPLE MEANS IN SAID EXTENSION MEMBER FOR GRIPPING SAID LOWER PIPE STRING SECTION WHEN SLID THEREOVER; INTERNAL THREADS IN THE BORE OF SAID TUBULAR EXTENSION MEMBER ABOVE SAID GRAPPLE MEANS; A RETRIEVABLE, SUBSTANTIALLY CONICAL INNER GUIDE MEMBER HAVING A THREADED UPPER PORTION ENGAGING SAID IN-
References Cited (Backward Citations)
US1751998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |