US2755071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for enlarging well bores
Assignee: Rotary Oil Tool Co
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Filing: 1954-08-25
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Granted: 1956-07-17
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Expires: 1974-08-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Archer W Kammerer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:39
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/32; E21B10/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A ROTARY WELL DRILLING BIT: A MAIN BODY HAVING A LOWER FLUID PASSAGE; CUTTER MEANS MOUNTED ON SAID BODY FOR LATERAL MOVEMENT WITH RESPECT TO SAID BODY; MEANS ENGAGEABLE WITH SAID CUTTER MEANS FOR EXPANDING SAID CUTTER MEANS LATERALLY OUTWARD AND FOR PREVENTING INWARD MOVEMENT OF SAID CUTTER MEANS FROM SUCH OUTWARD POSITION, SAID EXPANDING MEANS INCLUDING A TUBULAR MEMBER IN SAID BODY AND HAVING ITS LOWER END DISPOSED ABOVE THE UPPER END OF SAID FLUID PASSAGE AND ABOVE SAID CUTTER MEANS WHEN SAID CUTTER MEANS IS IN RETRACTED POSITION WITHIN SAID BODY CLOSELY ADJACENT THE AXIS OF SAID BODY; SAID TUBULAR MEMBER MOVING DOWNWARDLY OF SAID BODY ALONG SAID CUT TER MEANS AND INTO SAID LOWER FLUID PASSAGE, AS SAID CUTTER MEANS IS EXPANDED OUTWARDLY, TO CONDUCT FLUID INTO SAID LOWER FLUID PASSAGE.
Claim 2
Dependent Claim
135 words
IN A ROTARY WELL DRILLING BIT: A MAIN BODY HAVING A LOWER FLUID PASSAGE; CUTTER MEANS MOUNTED ON SAID BODY FOR LATERAL MOVEMENT WITH RESPECT TO SAID BODY; MEANS ENGAGEABLE WITH SAID CUTTER MEANS FOR EXPANDING SAID CUTTER MEANS LATERALLY OUTWARD AND FOR PREVENTING INWARD MOVEMENT OF SAID CUTTER MEANS FROM SUCH OUTWARD POSITION, SAID EXPANDING MEANS INCLUDING A TUBULAR MEMBER IN SAID BODY AND HAVING ITS LOWER END DISPOSED ABOVE THE UPPER END OF SAID FLUID PASSAGE AND ABOVE SAID CUTTER MEANS WHEN SAID CUTTER MEANS IS IN RETRACTED POSITION WITHIN SAID BODY CLOSELY ADJACENT THE AXIS OF SAID BODY; SAID TUBULAR MEMBER MOVING DOWNWARDLY OF SAID BODY ALONG SAID CUT TER MEANS AND INTO SAID LOWER FLUID PASSAGE, AS SAID CUTTER MEANS IS EXPANDED OUTWARDLY, TO CONDUCT FLUID INTO SAID LOWER FLUID PASSAGE.
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) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |