US3136569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parallel tubing string apparatus
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1961-07-21
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Granted: 1964-06-09
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Expires: 1981-07-21
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Bigelow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:25
CPC Classifications
F; F16; F16L; F16L39/00; E; E21; E21B; E21B43/00; E21B43/02; E21B43/10; E21B43/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN SUBSURFACE WELL PRODUCTION APPARATUS ADAPTED FOR USE WITH A PLURALITY OF TUBULAR STRINGS EXTENDING TO THE TOP OF A WELL BORE: BODY MEANS ADAPTED TO BE DISPOSED IN THE WELL BORE AND HAVING PASSAGE MEANS THEREIN ADAPTED TO RECEIVE THE PLURALITY OF TUBULAR STRINGS WHICH EXTEND TO THE TOP OF THE WELL BORE; RELEASABLE MEANS IN SAID BODY MEANS ADAPTED TO RELEASABLY COUPLE ONE OF THE TUBULAR STRINGS TO THE BODY MEANS; AND MEANS IN SAID BODY MEANS CONNECTED TO THE RELEASABLE MEANS AND ENGAGEABLE AND MOVABLE BY ANOTHER OF THE TUBULAR STRINGS
Claim 2
Dependent Claim
94 words
IN SUBSURFACE WELL PRODUCTION APPARATUS ADAPTED FOR USE WITH A PLURALITY OF TUBULAR STRINGS EXTENDING TO THE TOP OF A WELL BORE: BODY MEANS ADAPTED TO BE DISPOSED IN THE WELL BORE AND HAVING PASSAGE MEANS THEREIN ADAPTED TO RECEIVE THE PLURALITY OF TUBULAR STRINGS WHICH EXTEND TO THE TOP OF THE WELL BORE; RELEASABLE MEANS IN SAID BODY MEANS ADAPTED TO RELEASABLY COUPLE ONE OF THE TUBULAR STRINGS TO THE BODY MEANS; AND MEANS IN SAID BODY MEANS CONNECTED TO THE RELEASABLE MEANS AND ENGAGEABLE AND MOVABLE BY ANOTHER OF THE TUBULAR STRINGS
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |