US3386764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overshot for retrievable bridge plug
Assignee: Halliburton Co
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Filing: 1966-12-15
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Granted: 1968-06-04
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Expires: 1986-12-15
Abstract
No abstract record available.
Inventors
- 👤 Robert T Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:32
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
AN OVERSHOT FOR SELECTIVELY ENGAGING A RETRIEVING HEAD ON THE CONTROL MANDREL OF A RETRIEVABLE BRIDGE PLUG, SAID RETRIEVING HEAD HAVING A LUG PROJECTING RADIALLY OUTWARD FROM A SIDE OF SAID HEAD, SAID OVERSHOT COMPRISING AN ELONGATED HOLLOW TUBULAR BODY HAVING SCREW THREAD MEANS AT ONE END THEREOF, SAID BODY INCLUDING MEANS FORMING A J-SLOT IN THE INTERIOR OF THE BODY, SAID BODY HAVING A RADIAL RIDGE ADJACENT THE OPPOSITE END OF SAID BODY, SAID J-SLOT MEANS BEING BETWEEN SAID RIDGE AND SAID ONE END OF SAID BODY AND HAVING AN AXIALLY EXTENDING PORTION TERMINATING IN AN OPEN END ADJACENT SAID RIDGE, THE INTERNAL DIAMETER OF SAID BODY AT SAID RIDGE BEING SUBSTANTIALLY LESS THAN THE INTERNAL DIAMETER AT SAID AXIALLY EXTENDING J-SLOT PORTION, WHEREBY IN FORCING THE LUG ACROSS THE RIDGE BY AXIAL FORCE TRANSMITTED THROUGH THE OVERSHOT, A POSITIVE INDICATION OF ENGAGEMENT OR DISENGAGEMENT OF THE OVERSHOT WITH THE RETRIEVING HEAD IS PROVIDE.
Claim 2
Dependent Claim
155 words
AN OVERSHOT FOR SELECTIVELY ENGAGING A RETRIEVING HEAD ON THE CONTROL MANDREL OF A RETRIEVABLE BRIDGE PLUG, SAID RETRIEVING HEAD HAVING A LUG PROJECTING RADIALLY OUTWARD FROM A SIDE OF SAID HEAD, SAID OVERSHOT COMPRISING AN ELONGATED HOLLOW TUBULAR BODY HAVING SCREW THREAD MEANS AT ONE END THEREOF, SAID BODY INCLUDING MEANS FORMING A J-SLOT IN THE INTERIOR OF THE BODY, SAID BODY HAVING A RADIAL RIDGE ADJACENT THE OPPOSITE END OF SAID BODY, SAID J-SLOT MEANS BEING BETWEEN SAID RIDGE AND SAID ONE END OF SAID BODY AND HAVING AN AXIALLY EXTENDING PORTION TERMINATING IN AN OPEN END ADJACENT SAID RIDGE, THE INTERNAL DIAMETER OF SAID BODY AT SAID RIDGE BEING SUBSTANTIALLY LESS THAN THE INTERNAL DIAMETER AT SAID AXIALLY EXTENDING J-SLOT PORTION, WHEREBY IN FORCING THE LUG ACROSS THE RIDGE BY AXIAL FORCE TRANSMITTED THROUGH THE OVERSHOT, A POSITIVE INDICATION OF ENGAGEMENT OR DISENGAGEMENT OF THE OVERSHOT WITH THE RETRIEVING HEAD IS PROVIDE.
References Cited (Backward Citations)
US1771066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |