US2751019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for disengaging threaded joints
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1954-02-23
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Granted: 1956-06-19
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Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Reuben C Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:15
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN SUBSURFACE APPARATUS: A WELL TOOL HAVING A THREAD; AN UPPER MEMBER ATTACHED TO A RUNNING-IN STRING; A LOWER MEMBER TELESCOPICALLY RELATED TO SAID UPPER MEMBER; EXPANSIBLE AND RETRACTABLE LATCH MEANS CARRIED BY AND MOVABLE LATERALLY OF SAID LOWER MEMBER, SAID LATCH MEANS HAVING A THREAD COMPANION TO SAID WELL TOOL THREAD AND ENGAGEABLE THEREWITH, SAID LATCH MEANS BEING MOVABLE LATERALLY IN ONE DIRECTION ON SAID LOWER MEMBER INTO THREADED ENGAGEMENT WITH SAID WELL TOOL THREAD AND LATERALLY IN THE OTHER DIRECTION ON SAID LOWER MEMBER TO AN EXTENT SUFFICIENT TO POSITION SAID THREADS OUT OF ENGAGEMENT WITH EACH OTHER TO ENABLE SAID LATCH MEANS TO BE MOVED LONGITUDINALLY AND WITHOUT ROTATION PAST SAID WELL TOOL THREAD; MEANS PROVIDING A CONNECTION BETWEEN SAID LOWER MEMBER AND LATCH MEANS FOR TRANSMITTING ROTARY MOTION THEREBETWEEN; MEANS PROVIDING A CONNECTION BETWEEN SAID UPPER AND LOWER MEMBERS FOR TRANSMITTING ROTARY MOTION THEREBETWEEN; AND MEANS URGING SAID LOWER MEMBER AND LATCH MEANS IN AN UPWARD DIRECTION RELATIVE TO SAID UPPER MEMBER.
Claim 2
Dependent Claim
166 words
IN SUBSURFACE APPARATUS: A WELL TOOL HAVING A THREAD; AN UPPER MEMBER ATTACHED TO A RUNNING-IN STRING; A LOWER MEMBER TELESCOPICALLY RELATED TO SAID UPPER MEMBER; EXPANSIBLE AND RETRACTABLE LATCH MEANS CARRIED BY AND MOVABLE LATERALLY OF SAID LOWER MEMBER, SAID LATCH MEANS HAVING A THREAD COMPANION TO SAID WELL TOOL THREAD AND ENGAGEABLE THEREWITH, SAID LATCH MEANS BEING MOVABLE LATERALLY IN ONE DIRECTION ON SAID LOWER MEMBER INTO THREADED ENGAGEMENT WITH SAID WELL TOOL THREAD AND LATERALLY IN THE OTHER DIRECTION ON SAID LOWER MEMBER TO AN EXTENT SUFFICIENT TO POSITION SAID THREADS OUT OF ENGAGEMENT WITH EACH OTHER TO ENABLE SAID LATCH MEANS TO BE MOVED LONGITUDINALLY AND WITHOUT ROTATION PAST SAID WELL TOOL THREAD; MEANS PROVIDING A CONNECTION BETWEEN SAID LOWER MEMBER AND LATCH MEANS FOR TRANSMITTING ROTARY MOTION THEREBETWEEN; MEANS PROVIDING A CONNECTION BETWEEN SAID UPPER AND LOWER MEMBERS FOR TRANSMITTING ROTARY MOTION THEREBETWEEN; AND MEANS URGING SAID LOWER MEMBER AND LATCH MEANS IN AN UPWARD DIRECTION RELATIVE TO SAID UPPER MEMBER.
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) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |