Patent US3351133A successfully refreshed from Google Patents.
US3351133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubing weight-controlled safety valve apparatus
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1965-06-14
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Granted: 1967-11-07
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Expires: 1985-06-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Ernest H Clark
- 👤 George M Raulins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:50
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/16; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A VALVE APPARATUS ADAPTED TO BE DISPOSED IN A WELL BORE: UPPER AND LOWER TUBULAR MEMBERS TELESCOPED ONE WITHIN THE OTHER; SAID UPPER MEMBER HAVING MEANS FOR CONNECTING SAID UPPER MEMBER TO A TUBULAR STRING EXTENDING TO THE TOP OF THE WELL BORE; SAID MEMBERS HAVING A FIRST PASSAGE THROUGH WHICH FLUID CAN FLOW BETWEEN THE TUBULAR STRING AND THE LOWER TUBULAR MEMBERS; SAID MEMBERS HAVING A SECOND PASSAGE THROUGH WHICH FLUID CAN FLOW BETWEEN THE INTERIOR OF SAID MEMBERS AND THE EXTERIOR OF SAID MEMBERS; MEANS ON SAID MEMBERS FOR CLOSING SAID FIRST AND SECOND PASSAGES WHEN SAID UPPER MEMBER IS IN A LOWER POSITION ALONG SAID LOWER MEMBER; SAID PASSAGES BEING OPEN WHEN SAID UPPER MEMBER IS IN AN UPPER POSITION ALONG SAID LOWER MEMBER.
Claim 2
Dependent Claim
128 words
IN A VALVE APPARATUS ADAPTED TO BE DISPOSED IN A WELL BORE: UPPER AND LOWER TUBULAR MEMBERS TELESCOPED ONE WITHIN THE OTHER; SAID UPPER MEMBER HAVING MEANS FOR CONNECTING SAID UPPER MEMBER TO A TUBULAR STRING EXTENDING TO THE TOP OF THE WELL BORE; SAID MEMBERS HAVING A FIRST PASSAGE THROUGH WHICH FLUID CAN FLOW BETWEEN THE TUBULAR STRING AND THE LOWER TUBULAR MEMBERS; SAID MEMBERS HAVING A SECOND PASSAGE THROUGH WHICH FLUID CAN FLOW BETWEEN THE INTERIOR OF SAID MEMBERS AND THE EXTERIOR OF SAID MEMBERS; MEANS ON SAID MEMBERS FOR CLOSING SAID FIRST AND SECOND PASSAGES WHEN SAID UPPER MEMBER IS IN A LOWER POSITION ALONG SAID LOWER MEMBER; SAID PASSAGES BEING OPEN WHEN SAID UPPER MEMBER IS IN AN UPPER POSITION ALONG SAID LOWER MEMBER.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |