Patent US3797020A successfully refreshed from Google Patents.
US3211224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater well drilling apparatus
Assignee: Shell USA Inc
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Filing: 1963-10-09
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Granted: 1965-10-12
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Expires: 1983-10-09
Abstract
No abstract record available.
Inventors
- 👤 John E Lacy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:14
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
APPARATUS FOR DRILLING UNDERWATER WELLS COMPRISING A FLOATING VESSEL ON THE SURFACE OF SAID BODY OF WATER, UNDERWATER WELLHED ASSEMBLY POSITIONED BENEATH A VESSEL AT A SUBSTANTIAL DEPTH BELOW THE WATERA CONDUCTOR PIPE EXTENDING FROM SAID VESSEL TO SAID WELLHEAD ASSEMBLY, THE LOWER END OF SAID CONDUCTOR PIPE BEING SECURED TO SAID WELLHEAD ASSEMBLY, MEANS CARRIED BY SAID VESSEL FOR SUPPORTING THE UPPER END OF SAID CONDUCTOR PIPE AT SAID VESSEL, A TELESCOPING JOINT IN SAID CONDUCTOR PIPE IN THE LOWER PORTION THEREOF, SAID TELESCOPING JOINT HAVING UPPER AND LOWER SECTIONS, CONNECTOR MEANS CARRIED BY SAID LOWER SECTION OF SAID TELESCOPING JOINT WHEREBY SAID LOWER SECTION IS FIXEDLY SECURED TO SAID WELLHEAD ASSEMBLY, AND TENSION-APPLYING MEANS CARRIED BY SAID UPPER SECTION OF AID TELESCOPING JOINT AND OPERATIVELY CONNECTED THERETO FOR APPLYING TENSION IN ADDITION TO GRAVITY TO THE LOWER END OF A MAJOR PORTION OF SAID CONDUCTOR PIPE.
Claim 2
Dependent Claim
148 words
APPARATUS FOR DRILLING UNDERWATER WELLS COMPRISING A FLOATING VESSEL ON THE SURFACE OF SAID BODY OF WATER, UNDERWATER WELLHED ASSEMBLY POSITIONED BENEATH A VESSEL AT A SUBSTANTIAL DEPTH BELOW THE WATERA CONDUCTOR PIPE EXTENDING FROM SAID VESSEL TO SAID WELLHEAD ASSEMBLY, THE LOWER END OF SAID CONDUCTOR PIPE BEING SECURED TO SAID WELLHEAD ASSEMBLY, MEANS CARRIED BY SAID VESSEL FOR SUPPORTING THE UPPER END OF SAID CONDUCTOR PIPE AT SAID VESSEL, A TELESCOPING JOINT IN SAID CONDUCTOR PIPE IN THE LOWER PORTION THEREOF, SAID TELESCOPING JOINT HAVING UPPER AND LOWER SECTIONS, CONNECTOR MEANS CARRIED BY SAID LOWER SECTION OF SAID TELESCOPING JOINT WHEREBY SAID LOWER SECTION IS FIXEDLY SECURED TO SAID WELLHEAD ASSEMBLY, AND TENSION-APPLYING MEANS CARRIED BY SAID UPPER SECTION OF AID TELESCOPING JOINT AND OPERATIVELY CONNECTED THERETO FOR APPLYING TENSION IN ADDITION TO GRAVITY TO THE LOWER END OF A MAJOR PORTION OF SAID CONDUCTOR PIPE.
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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |