Patent US3332492A successfully refreshed from Google Patents.
US3332492A
Expired / Lapsed
US
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Casing cutting system
Assignee: Pan American Petroleum Corp
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Filing: 1965-04-15
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Granted: 1967-07-25
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Expires: 1985-04-15
Abstract
No abstract record available.
Inventors
- 👤 Roy P Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:01
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
AN APPARATUS FOR CUTTING A CASING IN A WELL FROM A FLOATING VESSEL IN A MARINE LOCATION WHICH COMPRISES: A PLUG SET JUST BELOW A DEPTH IN THE WELL AT WHICH IT IS DESIRED TO CUT THE CASING; A DRILL STRING INCLUDING A SLIP JOINT; A CASING CUTTER ATTACHED TO SAID DRILL STRING AT A POINT BELOW SAID SLIP JOINT;
References Cited (Backward Citations)
US1116387A
Cited
US1698162A
Cited
US2134796A
Cited
US2270928A
Cited
US2501761A
Cited
US3012608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |