Patent US3378067A successfully refreshed from Google Patents.
US3378067A
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US
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Underwater wellhead
Assignee: Mobil Oil AS
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Filing: 1966-05-20
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Granted: 1968-04-16
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Expires: 1986-05-20
Abstract
No abstract record available.
Inventors
- 👤 John R Leonard
- 👤 James W Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:40
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/01; E21B17/00; E21B17/01; E21B17/015; E21B17/20; E21B33/00; E21B33/02; E21B33/03; E21B33/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
APPARATUS FOR PRODUCING OIL AND/OR GAS FROM A SUBAQUEOUS WELL, CONSISTING OF: A CONDUCTOR PIPE SET IN THE WELLBORE AND PROTRUDING THEREFROM, SAID CONDUCTOR PIPE BEING LONG ENOUGH FOR THE UPPER END TO PROJECT ABOVE THE SURFACE OF THE BODY OF WATER AT THE WELL SITE WHEN SAID CONDUCTOR PIPE IS VERTICALLY POSITIONED; A CHRISTMAS TREE FIXED ON SAID UPPER END OF SAID CONDUCTOR PIPE AND OPERATIVELY CONNECTED THEREWITH; MEANS FOR SHELTERING SAID CHRISTMAS TREE BENEATH SAID SURFACE OF SAID BODY OF WATER INCLUDING A FLEXIBLE SECTION IN SAID CONDUCTOR PIPE; PRODUCTION TUBING WITHIN SAID CONDUCTOR PIPE FOR OPERATIVELY
Claim 2
Dependent Claim
99 words
APPARATUS FOR PRODUCING OIL AND/OR GAS FROM A SUBAQUEOUS WELL, CONSISTING OF: A CONDUCTOR PIPE SET IN THE WELLBORE AND PROTRUDING THEREFROM, SAID CONDUCTOR PIPE BEING LONG ENOUGH FOR THE UPPER END TO PROJECT ABOVE THE SURFACE OF THE BODY OF WATER AT THE WELL SITE WHEN SAID CONDUCTOR PIPE IS VERTICALLY POSITIONED; A CHRISTMAS TREE FIXED ON SAID UPPER END OF SAID CONDUCTOR PIPE AND OPERATIVELY CONNECTED THEREWITH; MEANS FOR SHELTERING SAID CHRISTMAS TREE BENEATH SAID SURFACE OF SAID BODY OF WATER INCLUDING A FLEXIBLE SECTION IN SAID CONDUCTOR PIPE; PRODUCTION TUBING WITHIN SAID CONDUCTOR PIPE FOR OPERATIVELY
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) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |