Patent US3229960A successfully refreshed from Google Patents.
US3229960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hoisting apparatus for well rig
Assignee: Individual
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Filing: 1964-03-23
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Granted: 1966-01-18
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Expires: 1984-03-23
Abstract
No abstract record available.
Inventors
- 👤 Jean D Loomis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:03
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/02; E21B19/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
FOR USE IN A WELL DERRICK HAVING A CROWN BLOCK AND A TRAVELING BLOCK WITH AN ELEVATOR SUPPORTED IMMEDIATELY THEREBENEATH FOR MAKING UP TUBING AND LOWERING THE SAME IN A WELL, A CONNECT AND DISCONNECT APPARATUS FOR RAISING OR LOWERING A TOOL WITHIN THE WELL TUBING COMPRISING: A SHEAVE SUPPORTED ON THE DERRICK ADJACENT THE CROWN BLOCK AND OFFSET WITH RESPECT TO THE TRAVELING BLOCK, A HOISTING CABLE PASSING OVER SAID SHEAVE, AN ELONGATED FLEXIBLE WEIGHT HAVING ONE END ATTACHED TO SAID HOISTING CABLE AND HAVING A SIZE CAPABLE OF INSERTION ITNO THE STAND OF WELL TUBING, SAID WEIGHT BEING CAPABLE OF FLEXING ABOUT THE TRAVELING BLOCK AND INCLUDING A PLURALITY OF ELONGATED BARS PIVOTALLY CONNECTED TOGETHER, AND GRAPPLING MEANS SUPPORTED ON THE OTHER END OF SAID WEIGHT FOR CONNECTING AND DISCONNECTING TO THE TOOL.
Claim 2
Dependent Claim
135 words
FOR USE IN A WELL DERRICK HAVING A CROWN BLOCK AND A TRAVELING BLOCK WITH AN ELEVATOR SUPPORTED IMMEDIATELY THEREBENEATH FOR MAKING UP TUBING AND LOWERING THE SAME IN A WELL, A CONNECT AND DISCONNECT APPARATUS FOR RAISING OR LOWERING A TOOL WITHIN THE WELL TUBING COMPRISING: A SHEAVE SUPPORTED ON THE DERRICK ADJACENT THE CROWN BLOCK AND OFFSET WITH RESPECT TO THE TRAVELING BLOCK, A HOISTING CABLE PASSING OVER SAID SHEAVE, AN ELONGATED FLEXIBLE WEIGHT HAVING ONE END ATTACHED TO SAID HOISTING CABLE AND HAVING A SIZE CAPABLE OF INSERTION ITNO THE STAND OF WELL TUBING, SAID WEIGHT BEING CAPABLE OF FLEXING ABOUT THE TRAVELING BLOCK AND INCLUDING A PLURALITY OF ELONGATED BARS PIVOTALLY CONNECTED TOGETHER, AND GRAPPLING MEANS SUPPORTED ON THE OTHER END OF SAID WEIGHT FOR CONNECTING AND DISCONNECTING TO THE TOOL.
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |