US3405764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple purpose well tools
Assignee: Schlumberger Technology Corp
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Filing: 1962-07-18
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Granted: 1968-10-15
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Expires: 1982-07-18
Abstract
No abstract record available.
Inventors
- 👤 Benjamin P Nutter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:25
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/004; E21B23/006; E21B34/00; E21B34/06; E21B34/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A WELL TOOL COMPRISING: A TUBULAR HOUSING HAVING A LOWER END ARRANGED FOR CONNECTION WITH A PACKING MEANS; A TUBULAR FULL-OPENING MANDREL SLIDABLY RECEIVED WITHIN SAID HOUSING AND HAVING AN UPPER END ARRANGED FOR CONNECTION WITH A STRING OF TUBING; A RETRIEVABLE INNER MANDREL ASSEMBLY DISPOSED WITHIN SAID FULL-OPENING MANDREL; MEANS TO RELEASABLY SECURE SAID INNER MANDREL ASSEMBLY TO SAID FULL-OPENING MANDREL INCLUDING A PLURALITY OF DETENT MEANS INTERLOCKING SAID INNER MANDREL ASSEMBLY AND SAID FULL-OPENING MANDREL; AND MEANS TO RELEASE SAID DETENT MEANS FROM A LOCKING POSITION BY RELATIVE ROTATION BETWEEN SAID FULL-OPENING MANDREL AND SAID TUBULAR HOUSING.
Claim 2
Dependent Claim
99 words
A WELL TOOL COMPRISING: A TUBULAR HOUSING HAVING A LOWER END ARRANGED FOR CONNECTION WITH A PACKING MEANS; A TUBULAR FULL-OPENING MANDREL SLIDABLY RECEIVED WITHIN SAID HOUSING AND HAVING AN UPPER END ARRANGED FOR CONNECTION WITH A STRING OF TUBING; A RETRIEVABLE INNER MANDREL ASSEMBLY DISPOSED WITHIN SAID FULL-OPENING MANDREL; MEANS TO RELEASABLY SECURE SAID INNER MANDREL ASSEMBLY TO SAID FULL-OPENING MANDREL INCLUDING A PLURALITY OF DETENT MEANS INTERLOCKING SAID INNER MANDREL ASSEMBLY AND SAID FULL-OPENING MANDREL; AND MEANS TO RELEASE SAID DETENT MEANS FROM A LOCKING POSITION BY RELATIVE ROTATION BETWEEN SAID FULL-OPENING MANDREL AND SAID TUBULAR HOUSING.
References Cited (Backward Citations)
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US2670798A
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US2766831A
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US2751014A
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US2760581A
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US2776012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |