US3351144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary expansible drilling apparatus with centrifugally operated latch
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1965-04-05
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Granted: 1967-11-07
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Expires: 1985-04-05
Abstract
No abstract record available.
Inventors
- 👤 Robert O Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:53
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/32; E21B10/322; E21B10/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
IN ROTARY EXPANSIBLE DRILL BIT APPARATUS ADAPTED TO BE LOWERED IN A WELL BORE; A ROTARY DRILL BIT HAVING NORMALLY RETRACTED MEANS SHIFTABLE LATERALLY OUTWARDLY; ACTUATING MEANS MOVABLE IN ONE DIRECTION FOR SHIFTING SAID CUTTER MEANS LATERALLY OUTWARDLY; MEANS CONNECTED TO SAID ACTUATING MEANS TO PREVENT SAID ACTUATING MEANS FROM SHIFTING SAID CUTTER MEANS LATERALLY OUTWARDLY; MEANS FOR RELEASING SAID PREVENTING MEANS INDEPENDENTLY OF ACTUATION OF SAID ACTUATING MEANS IN SHIFTING SAID CUTTER MEANS LATERALLY OUTWARDLY; MEANS ENGAGING SAID ACTUATING MEANS FOR MOVING SAID ACTUATING MEANS IN THE OPPOSITE DIRECTION TO SHIFT SAID CUTTER MEANS FROM ITS LATERALLY OUTWARD POSITION TO RETRACTED POSITION WHILE SAID APPARATUS IS IN THE WELL BORE; AND MEANS FOR REPLACING SAID PREVENTING MEANS IN ITS POSITION PREVENTING ACTUATION OF SAID ACTUATING MEANS WHILE SAID APPARATUS IS IN THE WELL BORE AND AFTER SHIFTING OF SAID CUTTER MEANS TO RETRACTED POSITION.
Claim 2
Dependent Claim
145 words
IN ROTARY EXPANSIBLE DRILL BIT APPARATUS ADAPTED TO BE LOWERED IN A WELL BORE; A ROTARY DRILL BIT HAVING NORMALLY RETRACTED MEANS SHIFTABLE LATERALLY OUTWARDLY; ACTUATING MEANS MOVABLE IN ONE DIRECTION FOR SHIFTING SAID CUTTER MEANS LATERALLY OUTWARDLY; MEANS CONNECTED TO SAID ACTUATING MEANS TO PREVENT SAID ACTUATING MEANS FROM SHIFTING SAID CUTTER MEANS LATERALLY OUTWARDLY; MEANS FOR RELEASING SAID PREVENTING MEANS INDEPENDENTLY OF ACTUATION OF SAID ACTUATING MEANS IN SHIFTING SAID CUTTER MEANS LATERALLY OUTWARDLY; MEANS ENGAGING SAID ACTUATING MEANS FOR MOVING SAID ACTUATING MEANS IN THE OPPOSITE DIRECTION TO SHIFT SAID CUTTER MEANS FROM ITS LATERALLY OUTWARD POSITION TO RETRACTED POSITION WHILE SAID APPARATUS IS IN THE WELL BORE; AND MEANS FOR REPLACING SAID PREVENTING MEANS IN ITS POSITION PREVENTING ACTUATION OF SAID ACTUATING MEANS WHILE SAID APPARATUS IS IN THE WELL BORE AND AFTER SHIFTING OF SAID CUTTER MEANS TO RETRACTED POSITION.
Claim 3
Dependent Claim
100 words
IN A CONTROL UNIT FOR AN EXPANSIBLE ROTARY DRILL BIT HAVING CUTTER MEANS AND SHIFTABLE MEANS FOR EXPANDING THE CUTTER MEANS: A BODY HAVING A CONNECTION FOR SECURING SAID BODY TO THE DRILL BIT; AN EXTENSION MEMBER SLIDABLE LONGITUDINALLY IN SAID BODY AND HAVING MEANS FOR CONNECTING SAID EXTENSION MEMBER TO THE EXPANDING MEANS; A LOCK MEMBER CARRIED BY SAID EXTENSION MEMBER AND ENGAGEABLE WITH SAID BODY TO PREVENT SAID EXTENSION MEMBER FROM SHIFTING LONGITUDINALLY IN SAID BODY; AND CENTRIFUGALLY OPERATED MEANS RESPONSIVE TO ROTATION OF SAID BODY FOR SHIFTING SAID LOCK MEMBER FROM SAID BODY TO A RELEASED POSITION.
Claim 4
Dependent Claim
100 words
IN A CONTROL UNIT FOR AN EXPANSIBLE ROTARY DRILL BIT HAVING CUTTER MEANS AND SHIFTABLE MEANS FOR EXPANDING THE CUTTER MEANS: A BODY HAVING A CONNECTION FOR SECURING SAID BODY TO THE DRILL BIT; AN EXTENSION MEMBER SLIDABLE LONGITUDINALLY IN SAID BODY AND HAVING MEANS FOR CONNECTING SAID EXTENSION MEMBER TO THE EXPANDING MEANS; A LOCK MEMBER CARRIED BY SAID EXTENSION MEMBER AND ENGAGEABLE WITH SAID BODY TO PREVENT SAID EXTENSION MEMBER FROM SHIFTING LONGITUDINALLY IN SAID BODY; AND CENTRIFUGALLY OPERATED MEANS RESPONSIVE TO ROTATION OF SAID BODY FOR SHIFTING SAID LOCK MEMBER FROM SAID BODY TO A RELEASED POSITION.
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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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |