Patent US2042644A successfully refreshed from Google Patents.
Patent US3091290A successfully refreshed from Google Patents.
US3091290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well bore milling apparatus
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1960-02-18
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Granted: 1963-05-28
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Expires: 1980-02-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Earnest H Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:37
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/06; E21B29/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
IN APPARATUS FOR DISINTEGRATING A WELL TOOL SET IN A WELL CONDUIT DISPOSED IN A BORE HOLE, THE WELL TOOL HAVING A PASSAGE THEREIN: A MANDREL ADAPTED TO BE CONNECTED TO A TUBULAR RUNNING-IN STRING AND LOWERED IN THE WELL CONDUIT TO THE WELL TOOL; CUTTER MEANS SECURED TO SAID MANDREL AND ENGAGEABLE WITH THE WELL TOOL TO DISINTEGRATE THE SAME PROGRESSIVELY IN A DOWNWARD DIRECTION IN RESPONSE TO ROTATION OF THE TUBULAR RUNNING-IN STRING AND MANDREL; A PILOT SECURED TO SAID MANDREL FOR RECEPTION
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) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |