US3202217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine cellar for deep water drilling operations
Assignee: Vetco Gray LLC
•
Filing: 1961-09-15
•
Granted: 1965-08-24
•
Expires: 1981-09-15
Abstract
No abstract record available.
Inventors
- 👤 John D Watts
- 👤 Slack John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:29
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/06; E21B7/00; E21B7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A METHOD OF CONDUCTING UNDERWATER WELL FORMING OPERATIONS COMPRISING: LOWERING A VERTICALLY DISPOSED PIPE STRUCTURE THROUGH A BODY OF WATER TO A POSITION AT WHICH THE UPPER END REMAINS ABOVE WATER; SEALING AN ANNULAR BUOYANCY TANK OF CONTROLLABLE BUOYANCY AROUND SAID PIPE STRUCTURE AT LEAST AT THE UPPER END THEREOF; SEQUENTIALLY CONNECTING SECTIONS OF PIPE TO THE ABOVE-WATER END OF THE PIPE STRUCTURE ABOVE SAID BUOYANCY TANK AND FURTHER LOWERING THE PIPE STRUCTURE INTO SAID BODY OF WATER TO COMPLETELY SUBMERGE SAID TANK; INCREASING THE BUOYANCY OF SAID TANK AS SAID PIPE STRUCTURE IS LOWERED; SUBSEQUENTLY DECREASING THE BUOYANCY OF SAID TANK IN ORDER TO INCREASE THE EFFECTIVE WEIGHT OF SAID PIPE STRUCTURE; EMBEEDING THE LOWER END OF SAID PIPE STRUCTURE INTO THE SUBMERGED BOTTOM; REMOVING SAID PIPE SECTIONS FREOM ABOVE SAID TANK; RELEASABLY ATTACHING A REMOVABLE HOUSING OF A SIZE TO CONTAIN MEN AROUND THE TOP OF SAID PIPE STRUCTURE, SAID HOUSING EXTENDING TO ABOVE WATER LEVLE; DRILLING DOWN-
Claim 2
Independent Claim
160 words
A METHOD OF CONDUCTING UNDERWATER WELL FORMING OPERATIONS COMPRISING: LOWERING A VERTICALLY DISPOSED PIPE STRUCTURE THROUGH A BODY OF WATER TO A POSITION AT WHICH THE UPPER END REMAINS ABOVE WATER; SEALING AN ANNULAR BUOYANCY TANK OF CONTROLLABLE BUOYANCY AROUND SAID PIPE STRUCTURE AT LEAST AT THE UPPER END THEREOF; SEQUENTIALLY CONNECTING SECTIONS OF PIPE TO THE ABOVE-WATER END OF THE PIPE STRUCTURE ABOVE SAID BUOYANCY TANK AND FURTHER LOWERING THE PIPE STRUCTURE INTO SAID BODY OF WATER TO COMPLETELY SUBMERGE SAID TANK; INCREASING THE BUOYANCY OF SAID TANK AS SAID PIPE STRUCTURE IS LOWERED; SUBSEQUENTLY DECREASING THE BUOYANCY OF SAID TANK IN ORDER TO INCREASE THE EFFECTIVE WEIGHT OF SAID PIPE STRUCTURE; EMBEEDING THE LOWER END OF SAID PIPE STRUCTURE INTO THE SUBMERGED BOTTOM; REMOVING SAID PIPE SECTIONS FREOM ABOVE SAID TANK; RELEASABLY ATTACHING A REMOVABLE HOUSING OF A SIZE TO CONTAIN MEN AROUND THE TOP OF SAID PIPE STRUCTURE, SAID HOUSING EXTENDING TO ABOVE WATER LEVLE; DRILLING DOWN-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |