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US3279536A
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Submarine drilling and production head and method of installing same
Assignee: Richfield Oil Corp
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Filing: 1961-04-03
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Granted: 1966-10-18
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Expires: 1981-04-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles E Wakefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:32
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
AN UNDERWATER PRODUCTION HEAD FOR CONTROLLING THE FLOW OF OIL AND GAS FROM A WELL DRILLED IN A FORMATION UNDERLYING A BODY OF WATER, COMPRISING IN COMBINATION: A FIRST TUBULAR MEMBER HAVING A SIDE OUTLET AND A SHOULDER THEREIN. A SECOND TUBULAR MEMBER DISPOSED WITHIN SAID FIRST TUBULAR MEMBER, SAID SECOND TUBULAR MEMBER HAVING A SIDE OUTLET IN FLUID COMMUNICATION WITH SAID SIDE OUTLET OF SAID FIRST TUBULAR MEMBER, MEANS FOR SUPPORTING SAID SECOND TUBULAR MEMBER AGAINST VERTICAL MOVEMENT RELATIVE TO SAID TUBULAR MEMBER, SAID MEANS INCLUDING LOCKING MEANS POSITIONED INTERNALLY OF SAID FIRST TUBULAR MEMBER AND AUTOMATICALLY MOVABLE INTO LOCKING POSITION RELATIVE TO SAID SHOULDER AS SAID SECOND TUBULAR MEMBER IS LOWERED INTO OPERATIVE POSITION IN SAID FIRST TUBULAR MEMBER.
Claim 2
Dependent Claim
121 words
AN UNDERWATER PRODUCTION HEAD FOR CONTROLLING THE FLOW OF OIL AND GAS FROM A WELL DRILLED IN A FORMATION UNDERLYING A BODY OF WATER, COMPRISING IN COMBINATION: A FIRST TUBULAR MEMBER HAVING A SIDE OUTLET AND A SHOULDER THEREIN. A SECOND TUBULAR MEMBER DISPOSED WITHIN SAID FIRST TUBULAR MEMBER, SAID SECOND TUBULAR MEMBER HAVING A SIDE OUTLET IN FLUID COMMUNICATION WITH SAID SIDE OUTLET OF SAID FIRST TUBULAR MEMBER, MEANS FOR SUPPORTING SAID SECOND TUBULAR MEMBER AGAINST VERTICAL MOVEMENT RELATIVE TO SAID TUBULAR MEMBER, SAID MEANS INCLUDING LOCKING MEANS POSITIONED INTERNALLY OF SAID FIRST TUBULAR MEMBER AND AUTOMATICALLY MOVABLE INTO LOCKING POSITION RELATIVE TO SAID SHOULDER AS SAID SECOND TUBULAR MEMBER IS LOWERED INTO OPERATIVE POSITION IN SAID FIRST TUBULAR MEMBER.
References Cited (Backward Citations)
GB336323A
Cited
US1836419A
Cited
US1923448A
Cited
US2077480A
Cited
US2096565A
Cited
US2187839A
Cited
US2469772A
Cited
US2623467A
Cited
US2808229A
Cited
US2810442A
Cited
US3050120A
Cited
US2889886A
Cited
US2859823A
Cited
US2906500A
Cited
US2918972A
Cited
US2970646A
Cited
US3032106A
Cited
US3065792A
Cited
US3130785A
Cited
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 |