US3256937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater well completion method
Assignee: Shell USA Inc
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Filing: 1959-07-30
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Granted: 1966-06-21
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Expires: 1979-07-30
Abstract
No abstract record available.
Inventors
- 👤 John A Haeber
- 👤 Lloyd G Otteman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:12
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/12; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/043; E21B33/047; E21B33/06; E21B33/064; E21B41/00; E21B41/10; E21B7/128; E21B33/035; E21B33/038
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
A METHOD OF COMPLETING FROM A FLOATING VESSEL AN UNDERWATER WELL POSITIONED BENEATH SAID VESSEL AND HAVING GUIDE MEANS EXTENDING THEREBETWEEN AND HAVING A CASINGHEAD POSITIONED ABOVE THE OCEAN FLOOR WITH CASING EXTENDING INTO THE WELL AND CEMENTED THEREIN, SAID METHOD COMPRISING (A) POSITIONING A STRING OF TUBING IN THE WELL CASING WITH THE UPPER PORTION OF SAID TUBING STRING EXTENDING UPWARDLY TO A POINT ABOVE THE SURFACE OF A BODY OF WATER ADJACENT SAID VESSEL, (B) ATTACHING A VALVED PRODUCTION WELLHEAD ASSEMBLY TO THE TOP OF SAID TUBING STRING, (C) LOWERING THE UPPER PORTION OF SAID TUBING STRINGS INTO SAID WELL CASING WHILE GUIDING THE PRODUCTION
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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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |