US3128614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling head
Assignee: Grant Oil Tool Co
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Filing: 1961-10-27
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Granted: 1964-04-14
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Expires: 1981-10-27
Abstract
No abstract record available.
Inventors
- 👤 Leland S Auer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:55
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/08; E21B33/085; E21B3/00; E21B3/02; E21B3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A WELL DRILLING HEAD FOR CONFINING FLUID WITHIN A WELL BY SURROUNDING AND SEALING AGAINST A ROTATABLE DRILL STRING INCLUDING A KELLY OF NON-CIRCULAR CROSS-SECTIONAL CONFIGURATION: A KELLY BUSHING ADAPTED TO ENGAGE THE KELLY IN LONGITUDINALLY SLIDING ENGAGEMENT FOR ROTATION THEREWITH; A SPINDLE ASSEMBLY NON-ROTATABLY MATED WITH SAID KELLY BUSHING FOR ROTATION THEREBY, SAID SPINDLE ASSEMBLY INCLUDING A DRIVE BUSHING MEMBER, A WIPER AFFIXED TO SAID DRIVE BUSHING MEMBER AND DEPENDED THEREFROM AND ADAPTED FOR SEALING CONTACT WITH THE DRILL STRING, AND A SPINDLE DRIVE MEMBER; A BEARING ASSEMBLY, SAID BEARING ASSEMBLY ROTATABLY MOUNTING SAID SPINDLE DRIVE MEMBER FOR ROTATION OF SAID SPINDLE ASSEMBLY ABOUT THE AXIS OF THE DRILL STRING; A HOUSING ENCLOSING SAID BEARING ASSEMBLY, SAID HOUSING HAVING AN AXIAL OPENING THERETHROUGH FOR THE PASSAGE OF SAID DRILL STRING AND FOR ENGAGEMENT OF SAID KELLY INTO SAID KELLY BUSHING, SEALING MEANS WITHIN SAID HOUSING ENCLOSING A CAVITY SURROUNDING SAID BEARINGS, MEANS SUPPLYING LUBRICANT TO SAID CAVITY, AND MEANS FOR MOUNTING SAID DRIVE BUSHING AND WIPER ASSEMBLY WITHIN SAID SPINDLE DRIVE MEMBER FOR SELECTIVE REMOVAL THEREFROM WITH SAID
Claim 2
Dependent Claim
179 words
A WELL DRILLING HEAD FOR CONFINING FLUID WITHIN A WELL BY SURROUNDING AND SEALING AGAINST A ROTATABLE DRILL STRING INCLUDING A KELLY OF NON-CIRCULAR CROSS-SECTIONAL CONFIGURATION: A KELLY BUSHING ADAPTED TO ENGAGE THE KELLY IN LONGITUDINALLY SLIDING ENGAGEMENT FOR ROTATION THEREWITH; A SPINDLE ASSEMBLY NON-ROTATABLY MATED WITH SAID KELLY BUSHING FOR ROTATION THEREBY, SAID SPINDLE ASSEMBLY INCLUDING A DRIVE BUSHING MEMBER, A WIPER AFFIXED TO SAID DRIVE BUSHING MEMBER AND DEPENDED THEREFROM AND ADAPTED FOR SEALING CONTACT WITH THE DRILL STRING, AND A SPINDLE DRIVE MEMBER; A BEARING ASSEMBLY, SAID BEARING ASSEMBLY ROTATABLY MOUNTING SAID SPINDLE DRIVE MEMBER FOR ROTATION OF SAID SPINDLE ASSEMBLY ABOUT THE AXIS OF THE DRILL STRING; A HOUSING ENCLOSING SAID BEARING ASSEMBLY, SAID HOUSING HAVING AN AXIAL OPENING THERETHROUGH FOR THE PASSAGE OF SAID DRILL STRING AND FOR ENGAGEMENT OF SAID KELLY INTO SAID KELLY BUSHING, SEALING MEANS WITHIN SAID HOUSING ENCLOSING A CAVITY SURROUNDING SAID BEARINGS, MEANS SUPPLYING LUBRICANT TO SAID CAVITY, AND MEANS FOR MOUNTING SAID DRIVE BUSHING AND WIPER ASSEMBLY WITHIN SAID SPINDLE DRIVE MEMBER FOR SELECTIVE REMOVAL THEREFROM WITH SAID
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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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |