Patent US3871895A successfully refreshed from Google Patents.
Patent US3105561A successfully refreshed from Google Patents.
US3105561A
Expired / Lapsed
US
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Hydraulic actuated drill collar
Assignee: Jersey Production Research Co
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Filing: 1960-09-13
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Granted: 1963-10-01
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Expires: 1980-09-13
Abstract
No abstract record available.
Inventors
- 👤 Jackson M Kellner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:37
CPC Classifications
E; E21; E21B; E21B44/00; E21B44/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
APPARATUS FOR APPLYING FORCE TO A DRILL BIT IN A WELL COMPRISING: AN INNER MANDREL ATTACHABLE TO SAID BIT AND ADAPTED TO SUPPLY PRESSURE FLUID TO SAID BIT, PISTON MEANS ATTACHED TO SAID INNER MANDREL, AN OUTER MANDREL SEALINGLY MOVABLE ABOUT SAID INNER MANDREL TO FORM A PRESSURE CYLINDER WITH SAID PISTON MEANS, PRESSURE FLUID RESPONSIVE MEANS IN FLUID COMMUNICATION WITH SAID CYLINDER AND OF A CHARACTER TO ANCHOR SAID OUTER MANDREL TO SAID WELL, AND MEANS RESPONSIVE TO SELECTED RELATIVE POSITIONS BETWEEN SAID OUTER MANDREL AND SAID INNER MANDREL FOR IN-
Claim 2
Dependent Claim
92 words
APPARATUS FOR APPLYING FORCE TO A DRILL BIT IN A WELL COMPRISING: AN INNER MANDREL ATTACHABLE TO SAID BIT AND ADAPTED TO SUPPLY PRESSURE FLUID TO SAID BIT, PISTON MEANS ATTACHED TO SAID INNER MANDREL, AN OUTER MANDREL SEALINGLY MOVABLE ABOUT SAID INNER MANDREL TO FORM A PRESSURE CYLINDER WITH SAID PISTON MEANS, PRESSURE FLUID RESPONSIVE MEANS IN FLUID COMMUNICATION WITH SAID CYLINDER AND OF A CHARACTER TO ANCHOR SAID OUTER MANDREL TO SAID WELL, AND MEANS RESPONSIVE TO SELECTED RELATIVE POSITIONS BETWEEN SAID OUTER MANDREL AND SAID INNER MANDREL FOR IN-
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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) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |