US3074494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retrievable drilling apparatus for bore holes
Assignee: Kammerer Fr GmbH
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Filing: 1959-08-24
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Granted: 1963-01-22
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Expires: 1979-08-24
Abstract
No abstract record available.
Inventors
- 👤 Archer W Kammerer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:52
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/64; E21B10/66; E21B10/26; E21B10/32; E21B10/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN A RETRIEVABLE DRILLING BIT ADAPTED TO BE LOWERED WITHIN AND COUPLED TO THE LOWER PORTION OF A STRING OF PIPE DISPOSED IN A WELL BORE: A BODY MOVABLE LONGITUDINALLY THROUGH THE PIPE; INITIALLY RETRACTED CUTTER MEANS; MEANS MOUNTING SAID CUTTER MEANS ON SAID BODY FOR EXPANSION LATERALLY OUTWARDLY OF SAID BODY; MEANS ON SAID BODY ADAPTED TO ENGAGE A LOWER PORTION OF THE PIPE TO LOCATE THE BIT IN THE PIPE WITH SAID CUTTER MEANS EXTENDING BELOW THE LOWER END OF THE PIPE; SPRING ACTUATED MEANS MOVABLE ALONG SAID BODY AND SAID CUTTER MEANS AND ENGAGEABLE WITH SAID CUTTER MEANS BELOW SAID MOUNTING MEANS FOR EXPANDING SAID CUTTER MEANS LATERALLY OUTWARDLY OF THE BODY TO DRILL AN EFFECTIVE HOLE DIAMETER GREATER THAN THE OUTSIDE DIAMETER OF THE PIPE; MEANS FOR TRANSMITTING DRILLING WEIGHT FROM THE PIPE TO THE BIT; AND MEANS FOR COUPLING THE BIT TO THE PIPE, WHEREBY THE PIPE IS ADAPTED TO ROTATE THE BIT.
Claim 2
Dependent Claim
158 words
IN A RETRIEVABLE DRILLING BIT ADAPTED TO BE LOWERED WITHIN AND COUPLED TO THE LOWER PORTION OF A STRING OF PIPE DISPOSED IN A WELL BORE: A BODY MOVABLE LONGITUDINALLY THROUGH THE PIPE; INITIALLY RETRACTED CUTTER MEANS; MEANS MOUNTING SAID CUTTER MEANS ON SAID BODY FOR EXPANSION LATERALLY OUTWARDLY OF SAID BODY; MEANS ON SAID BODY ADAPTED TO ENGAGE A LOWER PORTION OF THE PIPE TO LOCATE THE BIT IN THE PIPE WITH SAID CUTTER MEANS EXTENDING BELOW THE LOWER END OF THE PIPE; SPRING ACTUATED MEANS MOVABLE ALONG SAID BODY AND SAID CUTTER MEANS AND ENGAGEABLE WITH SAID CUTTER MEANS BELOW SAID MOUNTING MEANS FOR EXPANDING SAID CUTTER MEANS LATERALLY OUTWARDLY OF THE BODY TO DRILL AN EFFECTIVE HOLE DIAMETER GREATER THAN THE OUTSIDE DIAMETER OF THE PIPE; MEANS FOR TRANSMITTING DRILLING WEIGHT FROM THE PIPE TO THE BIT; AND MEANS FOR COUPLING THE BIT TO THE PIPE, WHEREBY THE PIPE IS ADAPTED TO ROTATE THE BIT.
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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |