Patent US3298440A successfully refreshed from Google Patents.
US3298440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-retrievable bridge plug
Assignee: Schlumberger Well Surveying Corp
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Filing: 1965-10-11
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Granted: 1967-01-17
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Expires: 1985-10-11
Abstract
No abstract record available.
Inventors
- 👤 James H Current
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:29
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/06; E21B33/00; E21B33/10; E21B33/12; E21B33/1208; E21B33/1216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN A PACKER HAVING A PACKING ELEMENT OPERATIVELY MOUNTED AROUND A MANDREL AND ADAPTED FOR EXPANSION INTO SEALING ENGAGEMENT WITH A WALL OF A WELL BORE FOR PACKING OFF THE ANNULAR SPACE BETWEEN SAID MANDREL AND WALL, AND A SLIP-EXPANDING MEMBER MOVABLY MOUNTED ON SAID MANDREL ADJACENT ONE END OF SAID PACKING ELEMENT AND HAVING AN OUTER TAPERED SURFACE CONVERGING TOWARD SAID MANDREL, THE IMPROVEMENT COMPRISING: A TUBULAR SLIP MEMBER FORMED OF A PLURALITY OF INDIVIDUAL, ELONGATED, SPACED-APART, SECTORIAL SEGMENTS UNIFORMLY ARRANGED AROUND THE PERIPHERY OF SAID SLIP MEMBER, SAID SEGMENTS HAVNG AN INNER SURFACE COMPLEMENTARILY SHAPED AND ADAPTED TO COENGAGE SAID TAPERED SURFACE OF SAID SLIP-EXPANDING MEMBER AND AN OUTER WALL-ENGAGING SURFACE; CONNECTING MEANS BETWEEN ADJACENT SEGMENTS OPERATIVELY ARRANGED AND ADAPTED TO PERMIT CIRCUMFERENTIAL EXPANSION OF SAID SLIP MEMBER; AND EXPANSIBLE MEANS
Claim 2
Dependent Claim
133 words
IN A PACKER HAVING A PACKING ELEMENT OPERATIVELY MOUNTED AROUND A MANDREL AND ADAPTED FOR EXPANSION INTO SEALING ENGAGEMENT WITH A WALL OF A WELL BORE FOR PACKING OFF THE ANNULAR SPACE BETWEEN SAID MANDREL AND WALL, AND A SLIP-EXPANDING MEMBER MOVABLY MOUNTED ON SAID MANDREL ADJACENT ONE END OF SAID PACKING ELEMENT AND HAVING AN OUTER TAPERED SURFACE CONVERGING TOWARD SAID MANDREL, THE IMPROVEMENT COMPRISING: A TUBULAR SLIP MEMBER FORMED OF A PLURALITY OF INDIVIDUAL, ELONGATED, SPACED-APART, SECTORIAL SEGMENTS UNIFORMLY ARRANGED AROUND THE PERIPHERY OF SAID SLIP MEMBER, SAID SEGMENTS HAVNG AN INNER SURFACE COMPLEMENTARILY SHAPED AND ADAPTED TO COENGAGE SAID TAPERED SURFACE OF SAID SLIP-EXPANDING MEMBER AND AN OUTER WALL-ENGAGING SURFACE; CONNECTING MEANS BETWEEN ADJACENT SEGMENTS OPERATIVELY ARRANGED AND ADAPTED TO PERMIT CIRCUMFERENTIAL EXPANSION OF SAID SLIP MEMBER; AND EXPANSIBLE MEANS
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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) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |