US3103976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe joint locator for underwater wells
Assignee: Shell USA Inc
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Filing: 1961-05-10
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Granted: 1963-09-17
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Expires: 1981-05-10
Abstract
No abstract record available.
Inventors
- 👤 Vries Douwe De
- 👤 Kenneth W Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:00
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B33/064; E21B33/035; E21B33/0355; E21B47/00; E21B47/001; E21B47/09; E21B47/092; E21B7/00; E21B7/12; E21B7/128
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
A METHOD OF EMERGENCY CONTROL OF AN UNDERWATER WELL DURING WELL OPERATIONS CARRIED OUT WHILE EMPLOYING A BLOWOUT PREVENTER SECURED TO THE UNDERWATER WELL AND A NUMBER OF PIPE SECTIONS SECURED END-TO-END BY TOOL JOINTS TO FORM A PIPE STRING EXTENDING THROUGH SAID BLOWOUT PREVENTER UPWARDLY TO A VESSEL ON THE SURFACE OF A BODY OF WATER, SAID METHOD COMPRISING (A) DETERMINING AT A POINT NEAR THE UNDERWATER WELL THE PRESENCE OR ABSENCE OF A TOOL JOINT IN A PIPE STRING AT A PREDETERMINED POSITION RELATIVE TO THE BLOWOUT PREVENTER AT THE WELL, (B) TRANSMITTING A SIGNAL INDICATIVE OF THE PRESENCE OR
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) | 1966-09-16 | 1967-03-18 | 1967-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-16 | 1971-03-18 | 1971-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-16 | 1975-03-18 | 1975-09-17 | $7700.00 | Window Closed / Lapsed |