Patent US3356142A successfully refreshed from Google Patents.
US3356142A
Expired / Lapsed
US
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Mechanical holddown for well packer
Assignee: Dresser Industries Inc
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Filing: 1966-02-17
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Granted: 1967-12-05
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Expires: 1986-02-17
Abstract
No abstract record available.
Inventors
- 👤 Morgan L Crow
- 👤 Marion D Kilgore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:34
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1291; E21B33/1292
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN A WELL PACKER INCLUDING, A PACKER ASSEMBLY; UPPER AND LOWER SLIP AND SLIP EXPANDER MEMBERS ON THE PACKER ASSEMBLY; MEANS HOLDING SAID LOWER SLIPS OUT OF ENGAGEMENT WITH SAID LOWER EXPANDER MEMBERS WHILE THE PACKER IS BEING LOWERED INTO A WELL; A MANDREL EXTENDING THROUGH THE PACKER ASSEMLBY; SLIDEABLY RELATED SEAL MEANS BETWEEN THE MANDREL AND THE PACKER ASSEMBLY; RELEASABLE ATTACHMENT MEANS BETWEEN THE MANDREL AND THE PACKER ASSEMBLY ABOVE THE UPPER SLIP AND EXPANDER MEMBERS; AND, RELEASABLY ATTACHMENT MEANS BETWEEN THE MANDREL AND THE PACKER ASSEMBLY BELOW THE LOWER SLIP AND EXPANDED MEMBERS; WHEREBY THE MANDREL CAN BE DISENGAGED FROM THE PACKER ASSEMBLY AND MOVED VERTICALLY WITH RELATIONSHIP THERETO AFTER THE PACKER IS SET.
Claim 2
Dependent Claim
116 words
IN A WELL PACKER INCLUDING, A PACKER ASSEMBLY; UPPER AND LOWER SLIP AND SLIP EXPANDER MEMBERS ON THE PACKER ASSEMBLY; MEANS HOLDING SAID LOWER SLIPS OUT OF ENGAGEMENT WITH SAID LOWER EXPANDER MEMBERS WHILE THE PACKER IS BEING LOWERED INTO A WELL; A MANDREL EXTENDING THROUGH THE PACKER ASSEMLBY; SLIDEABLY RELATED SEAL MEANS BETWEEN THE MANDREL AND THE PACKER ASSEMBLY; RELEASABLE ATTACHMENT MEANS BETWEEN THE MANDREL AND THE PACKER ASSEMBLY ABOVE THE UPPER SLIP AND EXPANDER MEMBERS; AND, RELEASABLY ATTACHMENT MEANS BETWEEN THE MANDREL AND THE PACKER ASSEMBLY BELOW THE LOWER SLIP AND EXPANDED MEMBERS; WHEREBY THE MANDREL CAN BE DISENGAGED FROM THE PACKER ASSEMBLY AND MOVED VERTICALLY WITH RELATIONSHIP THERETO AFTER THE PACKER IS SET.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |