US3299958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unitized well head
Assignee: FMC Corp
•
Filing: 1965-04-02
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Granted: 1967-01-24
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Expires: 1985-04-02
Abstract
No abstract record available.
Inventors
- 👤 William L Todd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:44
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A WELL HEAD APPARATUS COMPRISING A TUBULAR HEAD HAVING A BORE AND AN INTERNAL WALL EXTENDING AROUND THE BORE, AN ASSEMBLY INCLUDING FIRST HANGER MEANS SUPPORTED IN THE BORE OF THE HEAD AND A FIRST PIPE HANGING FROM SAID FIRST HANGER MEANS, SAID INTERNAL WALL PROJECTING ABOVE SAID ASSEMBLY, TO AN UPPER END PORTION OF THE HEAD; WELL CONTROL MEANS COUPLED TO SAID UPPER END PORTION OF THE HEAD, SAID WELL CONTROL MEANS HAVING A BORE COMMUNICATING WITH THE BORE IN SAID HEAD, SAID ASSEMBLY HAVING AN UPPER ANNULAR PORTION PROJECTING UPWARD FROM SAID FIRST HANGER MEANS AND SURROUNDER BY AND CIRCUMFERENTIALLY SPACED FROM SAID INTERNAL WALL; PACK-OFF BUSHING MEANS SUPPORTED IN THE BORE IN SAID HEAD BETWEEN SAID UPPER PORTION AND SAID INTERNAL WALL; MEANS SEALING BETWEEN SAID UPPER PORTION AND SAID BUSHING MEANS AND BETWEEN SAID INTERNAL WALL OF THE HEAD AND SAID BUSHING MEANS; AND A SECOND PIPE HANGING FROM SAID SECOND HANGER MEANS AND A SECOND PIPE HANGING FROM SAID SECOND HANGER MEANS AND PROJECTING INTO SAID BUSHING MEANS AND FIRST PIPE.
Claim 2
Dependent Claim
176 words
A WELL HEAD APPARATUS COMPRISING A TUBULAR HEAD HAVING A BORE AND AN INTERNAL WALL EXTENDING AROUND THE BORE, AN ASSEMBLY INCLUDING FIRST HANGER MEANS SUPPORTED IN THE BORE OF THE HEAD AND A FIRST PIPE HANGING FROM SAID FIRST HANGER MEANS, SAID INTERNAL WALL PROJECTING ABOVE SAID ASSEMBLY, TO AN UPPER END PORTION OF THE HEAD; WELL CONTROL MEANS COUPLED TO SAID UPPER END PORTION OF THE HEAD, SAID WELL CONTROL MEANS HAVING A BORE COMMUNICATING WITH THE BORE IN SAID HEAD, SAID ASSEMBLY HAVING AN UPPER ANNULAR PORTION PROJECTING UPWARD FROM SAID FIRST HANGER MEANS AND SURROUNDER BY AND CIRCUMFERENTIALLY SPACED FROM SAID INTERNAL WALL; PACK-OFF BUSHING MEANS SUPPORTED IN THE BORE IN SAID HEAD BETWEEN SAID UPPER PORTION AND SAID INTERNAL WALL; MEANS SEALING BETWEEN SAID UPPER PORTION AND SAID BUSHING MEANS AND BETWEEN SAID INTERNAL WALL OF THE HEAD AND SAID BUSHING MEANS; AND A SECOND PIPE HANGING FROM SAID SECOND HANGER MEANS AND A SECOND PIPE HANGING FROM SAID SECOND HANGER MEANS AND PROJECTING INTO SAID BUSHING MEANS AND FIRST PIPE.
References Cited (Backward Citations)
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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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |