US3097707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drilling well bores with casing
Assignee: Individual
•
Filing: 1960-04-25
•
Granted: 1963-07-16
•
Expires: 1980-04-25
Abstract
No abstract record available.
Inventors
- 👤 Archer W Kammerer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:38
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/64; E21B10/66; E21B10/26; E21B10/32; E21B10/34; E21B7/00; E21B7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 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; INTIALLY RETRACTED CUTTER MEANS MOUNTED ON SAID BODY FOR EXPANSION LATERALLY OUTWARDLY OF SAID BODY; SAID BODY HAVING STOP MEANS ENGAGEABLE WITH A LOWER PORTION OF THE PIPE TO LOCATE THE BIT IN THE PIPE WITH SAID CUTTER MEANS PROJECTING BELOW THE LOWER END OF THE PIPE; A MANDREL MOVABLE LONGITUDINALLY IN SAID BODY FOR EXPANDING SAID CUTTER MEANS LATERALLY OUTWARDLY; MEANS ON SAID MANDREL RESPONSIVE TO THE PRESSURE OF FLUID IN THE
Claim 2
Dependent Claim
106 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; INTIALLY RETRACTED CUTTER MEANS MOUNTED ON SAID BODY FOR EXPANSION LATERALLY OUTWARDLY OF SAID BODY; SAID BODY HAVING STOP MEANS ENGAGEABLE WITH A LOWER PORTION OF THE PIPE TO LOCATE THE BIT IN THE PIPE WITH SAID CUTTER MEANS PROJECTING BELOW THE LOWER END OF THE PIPE; A MANDREL MOVABLE LONGITUDINALLY IN SAID BODY FOR EXPANDING SAID CUTTER MEANS LATERALLY OUTWARDLY; MEANS ON SAID MANDREL RESPONSIVE TO THE PRESSURE OF FLUID IN THE
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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) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |