US3149685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft bearing fluid seal for downhole drilling engines
Assignee: Dresser Industries Inc
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Filing: 1959-04-30
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Granted: 1964-09-22
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Expires: 1979-04-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Mitchell
- 👤 Madden T Works
- 👤 Jr Thomas E Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:53
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A BEARING SUB-ASSEMBLY FOR A DRILLING FLUID DRIVEN DOWNHOLE DRILLING MOTOR ASSEMBLY HAVING A HOLLOW DRIVEN SHAFT ROTATED BY SAID MOTOR, TUBULAR MEANS CONNECTED TO THE MOTOR AND SURROUNDING THE UPPER PORTION OF THE DRIVEN SHAFT THEREBY FORMING AN ANNULAR PASSAGE BETWEEN SAID TUBULAR MEANS AND THE DRIVEN SHAFT ADAPTED TO RECEIVE DRILLING FLUID DISCHARGED FROM SAID MOTOR, AND A BEARING SUB-ASSEMBLY FOR AND SURROUNDING THE LOWER PORTION OF THE DRIVEN SHAFT, SAID BEARING SUB-ASSEMBLY COMPRISING A CYLINDRICAL HOUSING ADAPTED TO ENCIRCLE THE LOWER PORTION OF THE DRIVEN SHAFT, SAID HOUSING BEING ADAPTED TO BE SECURED TO THE LOWER END OF THE TUBULAR MEANS, A BEARING SLEEVE CARRIED WITHIN THE HOUSING AND ADAPTED TO ENGAGE THE ENCIRCLED DRIVEN SHAFT, SAID SLEEVE HAVING A PLURALITY OF SPACED LONGITUDINALLY EXTENDING GROOVES IN THE FACE ADAPTED TO ENGAGE THE DRIVEN SHAFT SO THAT DRILLING FLUID MAY BE PASSED DOWN THROUGH THE GROOVES TO LUBRICATE AND COOL THE SLEEVE AND THE DRIVEN SHAFT RIDING THEREAGAINST, A PORT
Claim 2
Dependent Claim
163 words
A BEARING SUB-ASSEMBLY FOR A DRILLING FLUID DRIVEN DOWNHOLE DRILLING MOTOR ASSEMBLY HAVING A HOLLOW DRIVEN SHAFT ROTATED BY SAID MOTOR, TUBULAR MEANS CONNECTED TO THE MOTOR AND SURROUNDING THE UPPER PORTION OF THE DRIVEN SHAFT THEREBY FORMING AN ANNULAR PASSAGE BETWEEN SAID TUBULAR MEANS AND THE DRIVEN SHAFT ADAPTED TO RECEIVE DRILLING FLUID DISCHARGED FROM SAID MOTOR, AND A BEARING SUB-ASSEMBLY FOR AND SURROUNDING THE LOWER PORTION OF THE DRIVEN SHAFT, SAID BEARING SUB-ASSEMBLY COMPRISING A CYLINDRICAL HOUSING ADAPTED TO ENCIRCLE THE LOWER PORTION OF THE DRIVEN SHAFT, SAID HOUSING BEING ADAPTED TO BE SECURED TO THE LOWER END OF THE TUBULAR MEANS, A BEARING SLEEVE CARRIED WITHIN THE HOUSING AND ADAPTED TO ENGAGE THE ENCIRCLED DRIVEN SHAFT, SAID SLEEVE HAVING A PLURALITY OF SPACED LONGITUDINALLY EXTENDING GROOVES IN THE FACE ADAPTED TO ENGAGE THE DRIVEN SHAFT SO THAT DRILLING FLUID MAY BE PASSED DOWN THROUGH THE GROOVES TO LUBRICATE AND COOL THE SLEEVE AND THE DRIVEN SHAFT RIDING THEREAGAINST, A PORT
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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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |