US3166124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wellhead closure plug
Assignee: Shell USA Inc
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Filing: 1962-05-24
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Granted: 1965-01-19
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Expires: 1982-05-24
Abstract
No abstract record available.
Inventors
- 👤 Glena D Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:39
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/068; E21B33/076; E21B33/06; E21B33/064; Y; Y10; Y10T; Y10T137/00; Y10T137/7504
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A WELLHEAD CLOSURE PLUG CONNECTIBLE TO AN UNDERWATER WELLHEAD FOR CLOSING CONCENTRIC CONDUIT MEANS THEREIN HAVING SPACE WITHIN EACH OF SAID CONDUIT MEANS, SAID PLUG COMPRISING (A) A PLUG BODY HAVING FORMED THEREON SEALING SURFACE MEANS ENGAGEABLE WITH SAID EACH OF SAID CONDUIT MEANS OF SAID WELLHEAD, (B)SEALING MEANS CARRIED BY EACH OF SAID SEALING SURFACE MEANS FOR FORMING A FLUIDTIGHT SEAL AGAINST AN ADJACENT WALL OF SAID CONDUIT MEANS WHEN POSITIONED THEREAGAINST, AND (C) LATCHING MEANS CARRIED BY SAID PLUG BODY AND EXTENDIBLE BEYOND THE OUTER SURFACE THEREOF AND ADAPTED TO ENGAGE ONE OF SAID WELL CONDUIT MEANS FOR ANCHORING THE PLUG BODY IN THE WELLHEAD AGAINST UPWARD MOVEMENT THEREFROM.
Claim 2
Dependent Claim
111 words
A WELLHEAD CLOSURE PLUG CONNECTIBLE TO AN UNDERWATER WELLHEAD FOR CLOSING CONCENTRIC CONDUIT MEANS THEREIN HAVING SPACE WITHIN EACH OF SAID CONDUIT MEANS, SAID PLUG COMPRISING (A) A PLUG BODY HAVING FORMED THEREON SEALING SURFACE MEANS ENGAGEABLE WITH SAID EACH OF SAID CONDUIT MEANS OF SAID WELLHEAD, (B)SEALING MEANS CARRIED BY EACH OF SAID SEALING SURFACE MEANS FOR FORMING A FLUIDTIGHT SEAL AGAINST AN ADJACENT WALL OF SAID CONDUIT MEANS WHEN POSITIONED THEREAGAINST, AND (C) LATCHING MEANS CARRIED BY SAID PLUG BODY AND EXTENDIBLE BEYOND THE OUTER SURFACE THEREOF AND ADAPTED TO ENGAGE ONE OF SAID WELL CONDUIT MEANS FOR ANCHORING THE PLUG BODY IN THE WELLHEAD AGAINST UPWARD MOVEMENT THEREFROM.
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) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |