Patent US3340928A successfully refreshed from Google Patents.
US3340928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine drilling method
Assignee: Individual
•
Filing: 1965-06-01
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Granted: 1967-09-12
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Expires: 1985-06-01
Abstract
No abstract record available.
Inventors
- 👤 Cicero C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:08
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF DRILLING A WELL IN WATER FROM A FLOATING PLATFORM COMPRISING, LOWERING CASING TO A POSITION WHEREIN ITS LOWER END IS IMMEDIATELY ABOVE THE UNDERWATER FLOOR, LOWERING DRILL ON DRILL PIPE THROUGH SAID CASING TO THE FLOOR, DRILLING A WELL BORE TO RECEIVE SAID CASING, SECURING THE DRILL PIPE TO THE CASING, AND LOWERING THE CASING INTO THE WELL BORE WITH THE DRILL PIPE GUIDING THE CASING INTO THE WELL BORE.
Claim 2
Independent Claim
73 words
THE METHOD OF DRILLING A WELL IN WATER FROM A FLOATING PLATFORM COMPRISING, LOWERING CASING TO A POSITION WHEREIN ITS LOWER END IS IMMEDIATELY ABOVE THE UNDERWATER FLOOR, LOWERING DRILL ON DRILL PIPE THROUGH SAID CASING TO THE FLOOR, DRILLING A WELL BORE TO RECEIVE SAID CASING, SECURING THE DRILL PIPE TO THE CASING, AND LOWERING THE CASING INTO THE WELL BORE WITH THE DRILL PIPE GUIDING THE CASING INTO THE WELL BORE.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |