Patent US3279544A successfully refreshed from Google Patents.
US3279544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well packer
Assignee: Camco Inc
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Filing: 1963-12-19
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Granted: 1966-10-18
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Expires: 1983-12-19
Abstract
No abstract record available.
Inventors
- 👤 Gilbert H Tausch
- 👤 Phillip R Hefley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:11
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1291
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A SUBSURFACE WELL TOOL, A UNITARY ASSEMBLY OF SLIPS AND FRICTION BLOCKS COMPRISING A TUBULAR CAGE HAVING A SIDE WALL WINDOW AND AN INTERNAL RETAINER ELEMENT PROJECTING ACROSS A PORTION OF THE WINDOW AND RADIALLY SPACED INWARDLY FROM THE WINDOW CONTAINING WALL, A SEGMENTAL SLIP AND FRICTION BLOCK MOUNTED IN END TO END SUCCESSION WITHIN AND FOR LATERAL PROJECTION THROUGH SAID WINDOW AND PROVIDED WITH OVERLAPPING PORTIONS AT THEIR ADJACENT ENDS, SUCH PORTION OF THE SLIP BEING INTERPOSED BETWEEN THE BLOCK PORTION AND SAID INTERNAL RETAINER ELEMENT FOR INWARD RETRACTED STOP ABUTMENT WITH THE LATTER AND SPRING MEANS YIELDABLY BIASING THE SLIP PORTION INWARDLY AND SAID BLOCK PORTION OUTWARDLY IN RELATION TO THE CAGE.
Claim 2
Dependent Claim
115 words
IN A SUBSURFACE WELL TOOL, A UNITARY ASSEMBLY OF SLIPS AND FRICTION BLOCKS COMPRISING A TUBULAR CAGE HAVING A SIDE WALL WINDOW AND AN INTERNAL RETAINER ELEMENT PROJECTING ACROSS A PORTION OF THE WINDOW AND RADIALLY SPACED INWARDLY FROM THE WINDOW CONTAINING WALL, A SEGMENTAL SLIP AND FRICTION BLOCK MOUNTED IN END TO END SUCCESSION WITHIN AND FOR LATERAL PROJECTION THROUGH SAID WINDOW AND PROVIDED WITH OVERLAPPING PORTIONS AT THEIR ADJACENT ENDS, SUCH PORTION OF THE SLIP BEING INTERPOSED BETWEEN THE BLOCK PORTION AND SAID INTERNAL RETAINER ELEMENT FOR INWARD RETRACTED STOP ABUTMENT WITH THE LATTER AND SPRING MEANS YIELDABLY BIASING THE SLIP PORTION INWARDLY AND SAID BLOCK PORTION OUTWARDLY IN RELATION TO THE CAGE.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |