Patent US3083973A successfully refreshed from Google Patents.
US3083973A
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Drilling head
Assignee: Cooper Industries LLC
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Filing: 1960-05-16
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Granted: 1963-04-02
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Expires: 1980-05-16
Abstract
No abstract record available.
Inventors
- 👤 Maurice C Lucky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:24
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/08; E21B33/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A DRILLING HEAD, COMPRISING A HOUSING FOR CONNECTION ABOVE A WELLHEAD MEMBER, A CARRIER RECEIVED WITHIN THE HOUSING FOR ROTATIVE AND AXIAL MOVEMENT WITH RESPECT THERETO, MEANS SEALING BETWEEN THE CARRIER AND HOUSING DURING SUCH MOVEMENT, AN ANNULUS OF RESILIENT MATERIAL ON THE CARRIER FOR CLOSING ABOUT A PIPE RECEIVED THEREIN TO CONTAIN FLUID IN THE ANNULAR SPACE BETWEEN THE PIPE AND WELLHEAD MEMBER, A BEARING BETWEEN THE CARRIER AND HOUSING TO RECEIVE THE THRUST IN ONE AXIAL DIRECTION DUE TO THE PRESSURE OF THE CONTAINED FLUID, SAID BEARING COMPRISING FIRST
Claim 2
Dependent Claim
91 words
A DRILLING HEAD, COMPRISING A HOUSING FOR CONNECTION ABOVE A WELLHEAD MEMBER, A CARRIER RECEIVED WITHIN THE HOUSING FOR ROTATIVE AND AXIAL MOVEMENT WITH RESPECT THERETO, MEANS SEALING BETWEEN THE CARRIER AND HOUSING DURING SUCH MOVEMENT, AN ANNULUS OF RESILIENT MATERIAL ON THE CARRIER FOR CLOSING ABOUT A PIPE RECEIVED THEREIN TO CONTAIN FLUID IN THE ANNULAR SPACE BETWEEN THE PIPE AND WELLHEAD MEMBER, A BEARING BETWEEN THE CARRIER AND HOUSING TO RECEIVE THE THRUST IN ONE AXIAL DIRECTION DUE TO THE PRESSURE OF THE CONTAINED FLUID, SAID BEARING COMPRISING FIRST
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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |