US2854215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Offshore oil well installation
Assignee: Shell Development Co
•
Filing: 1956-03-05
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Granted: 1958-09-30
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Expires: 1976-03-05
Abstract
No abstract record available.
Inventors
- 👤 Jr William R Cox
- 👤 Richard J Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:33
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/035; E21B33/037; E21B41/00; E21B41/06; Y; Y10; Y10T; Y10T137/00; Y10T137/402
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
AN UNDERWATER WELL INSTALLATION COMPRISING IN COMBINATION A WELL CASING EXTENDING INTO THE OCEAN FLOOR, A WELL-HEAD ASSEMBLY MOUNTED ON THE TOP OF SAID CASING AT A LEVEL BELOW THE SURFACE OF THE WATER AND ABOVE THE OCEAN FLOOR, A LARGE DIAMETER GUIDE PIPE SURROUNDING SAID CASING, THE LOWER END OF SAID GUIDE PIPE BEING POSITIONED IN SAID
Claim 2
Dependent Claim
58 words
AN UNDERWATER WELL INSTALLATION COMPRISING IN COMBINATION A WELL CASING EXTENDING INTO THE OCEAN FLOOR, A WELL-HEAD ASSEMBLY MOUNTED ON THE TOP OF SAID CASING AT A LEVEL BELOW THE SURFACE OF THE WATER AND ABOVE THE OCEAN FLOOR, A LARGE DIAMETER GUIDE PIPE SURROUNDING SAID CASING, THE LOWER END OF SAID GUIDE PIPE BEING POSITIONED IN SAID
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) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |