Patent US4496123A successfully refreshed from Google Patents.
Patent US3318397A successfully refreshed from Google Patents.
US3318397A
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Apparatus for use in well drilling
Assignee: Chevron USA Inc
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Filing: 1964-10-06
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Granted: 1967-05-09
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Expires: 1984-10-06
Abstract
No abstract record available.
Inventors
- 👤 Combes John De Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:14
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06; E21B7/062; E21B17/00; E21B17/10; E21B17/1057; E21B17/1064; E21B17/22; E21B4/00; E21B4/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
APPARATUS FOR DRILLING A WELL COMPRISING A DRILL BIT, PIPE MEANS FOR ROTATING SAID DRILL BIT, A TUBULAR MEMBER, MEANS FOR ROTATABLY MOUNTING SAID TUBULAR MEMBER AROUND SAID PIPE MEANS SO THAT THE LONGITUDINAL AXIS OF SAID TUBULAR MEMBER IS PARALLEL TO THE LONGITUDINAL AXIS OF SAID PIPE MEANS TO FORM AN ANNULAR CHAMBER BETWEEN THE OUTSIDE OF SAID PIPE MEANS AND THE INSIDE OF SAID TUBULAR MEMBER, MUD VANE MEANS FORMED ON THE INSIDE WALL OF SAID TUBULAR MEMBER RESPONSIVE TO MUD FLOW TO ROTATE SAID TUBULAR MEMBER IN A DIRECTION OPPOSITE TO THE NORMAL ROTATIONAL DIRECTION OF SAID DRILL BIT, PORT MEANS IN SAID PIPE MEANS FOR DIVERTING A PORTION OF THE DRILLING MUD PASSING THERETHROUGH TO SAID ANNULAR CHAMBER TO COOPERATE WITH SAID MUD VANE MEANS TO ROTATE SAID TUBULAR MEMBER
Claim 2
Dependent Claim
134 words
APPARATUS FOR DRILLING A WELL COMPRISING A DRILL BIT, PIPE MEANS FOR ROTATING SAID DRILL BIT, A TUBULAR MEMBER, MEANS FOR ROTATABLY MOUNTING SAID TUBULAR MEMBER AROUND SAID PIPE MEANS SO THAT THE LONGITUDINAL AXIS OF SAID TUBULAR MEMBER IS PARALLEL TO THE LONGITUDINAL AXIS OF SAID PIPE MEANS TO FORM AN ANNULAR CHAMBER BETWEEN THE OUTSIDE OF SAID PIPE MEANS AND THE INSIDE OF SAID TUBULAR MEMBER, MUD VANE MEANS FORMED ON THE INSIDE WALL OF SAID TUBULAR MEMBER RESPONSIVE TO MUD FLOW TO ROTATE SAID TUBULAR MEMBER IN A DIRECTION OPPOSITE TO THE NORMAL ROTATIONAL DIRECTION OF SAID DRILL BIT, PORT MEANS IN SAID PIPE MEANS FOR DIVERTING A PORTION OF THE DRILLING MUD PASSING THERETHROUGH TO SAID ANNULAR CHAMBER TO COOPERATE WITH SAID MUD VANE MEANS TO ROTATE SAID TUBULAR MEMBER
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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |