US3179448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wellhead apparatus
Assignee: Cooper Industries LLC
•
Filing: 1962-03-13
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Granted: 1965-04-20
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Expires: 1982-03-13
Abstract
No abstract record available.
Inventors
- 👤 Marvin R Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:49
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/043; E21B33/0422
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
WELLHEAD APPARATUS, COMPRISING A HEAD FOR CONNECTION TO AN OUTER CASING AND HAVING A BORE THERETHROUGH AND A BOWL WITHIN THE BORE, A MANDREL SEATABLE ON THE BOWL TO SUSPEND AN INNER CASING WITHIN THE OUTER CASING AND DEFINE OPENINGS COMMUNICATING THE BORE OF SAID HEAD ABOVE THE HANGER WITH THE ANNULAR SPACE BETWEEN THE INNER AND OUTER CASINGS, AND A SEAL AND HOLDDOWN ASSEMBLY LOWERABLE THROUGH THE BORE, INCLUDING A SLEEVE HAVING A FLANGE ON ITS UPPER END, A SEAL RING SLIDABLY CARRIED ABOUT THE SLEEVE AND ADAPTED TO LAND UPON SAID MANDREL, A LOCKING MEMBER CARRIED ABOVE THE SEAL RING AND BENEATH THE FLANGE ON THE SLEEVE, AND MEANS FOR SEALABLY AND THREADEDLY CONNECTING THE SLEEVE TO THE MANDREL SO THAT, UPON LANDING OF SAID SEAL RING, THE FLANGE FORCES THE LOCKING MEMBER DOWNWARDLY TO DEFORM THE SEAL RING INTO SEALING ENGAGEMENT BETWEEN THE SLEEVE AND BORE TO CLOSE SAID OPENINGS AND MOVE THE LOCKING MEMBER INTO LOCKING ENGAGEMENT WITH RESPECT TO THE BORE FOR HOLDING THE MANDREL DOWN UPON THE BOWL AND THE SEAL RING DOWN UPON THE MANDREL.
Claim 2
Dependent Claim
182 words
WELLHEAD APPARATUS, COMPRISING A HEAD FOR CONNECTION TO AN OUTER CASING AND HAVING A BORE THERETHROUGH AND A BOWL WITHIN THE BORE, A MANDREL SEATABLE ON THE BOWL TO SUSPEND AN INNER CASING WITHIN THE OUTER CASING AND DEFINE OPENINGS COMMUNICATING THE BORE OF SAID HEAD ABOVE THE HANGER WITH THE ANNULAR SPACE BETWEEN THE INNER AND OUTER CASINGS, AND A SEAL AND HOLDDOWN ASSEMBLY LOWERABLE THROUGH THE BORE, INCLUDING A SLEEVE HAVING A FLANGE ON ITS UPPER END, A SEAL RING SLIDABLY CARRIED ABOUT THE SLEEVE AND ADAPTED TO LAND UPON SAID MANDREL, A LOCKING MEMBER CARRIED ABOVE THE SEAL RING AND BENEATH THE FLANGE ON THE SLEEVE, AND MEANS FOR SEALABLY AND THREADEDLY CONNECTING THE SLEEVE TO THE MANDREL SO THAT, UPON LANDING OF SAID SEAL RING, THE FLANGE FORCES THE LOCKING MEMBER DOWNWARDLY TO DEFORM THE SEAL RING INTO SEALING ENGAGEMENT BETWEEN THE SLEEVE AND BORE TO CLOSE SAID OPENINGS AND MOVE THE LOCKING MEMBER INTO LOCKING ENGAGEMENT WITH RESPECT TO THE BORE FOR HOLDING THE MANDREL DOWN UPON THE BOWL AND THE SEAL RING DOWN UPON THE MANDREL.
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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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |