US3131769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic anchors for tubular strings
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1962-04-09
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Granted: 1964-05-05
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Expires: 1982-04-09
Abstract
No abstract record available.
Inventors
- 👤 Rochemont John F De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:03
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/04; E21B23/0411; E21B23/04115
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN APPARATUS TO BE LOWERED IN A WELL CONDUIT: A BODY HAVING A FLUID PASSAGE AND A LATERAL OPENING IN THE BODY COMMUNICATING WITH SAID PASSAGE; A GRIPPING MEMBER MOVABLE LATERALLY IN SAID OPENING AND SHIFTABLE BY THE PRESSURE OF FLUID IN SAID PASSAGE OUTWARDLY INTO GRIPPING ENGAGEMENT WITH THE WELL CONDUIT; A RETAINING MEMBER MOUNTED ON SAID BODY; A HOLDING DEVICE BETWEEN AND BEARING AGAINST SAID MEMBERS TO PREVENT LATERAL OUTWARD MOVEMENT OF SAID GRIPPING MEMBER AND TO HOLD SAID GRIPPING MEMBER IN RETRACTED POSITION, SAID DEVICE INCLUDING RELEASABLE MEANS ENGAGING ONE OF SAID MEMBERS AND RELEASABLE BY SAID GRIPPING MEMBER WHEN SAID GRIPPING MEMBER IS SUBJECTED TO A PREDETERMINED FLUID PRESSURE IN SAID PASSAGE TO ALLOW LATERAL OUTWARD EXPANSION OF SAID GRIPPING MEMBER.
Claim 2
Dependent Claim
125 words
IN APPARATUS TO BE LOWERED IN A WELL CONDUIT: A BODY HAVING A FLUID PASSAGE AND A LATERAL OPENING IN THE BODY COMMUNICATING WITH SAID PASSAGE; A GRIPPING MEMBER MOVABLE LATERALLY IN SAID OPENING AND SHIFTABLE BY THE PRESSURE OF FLUID IN SAID PASSAGE OUTWARDLY INTO GRIPPING ENGAGEMENT WITH THE WELL CONDUIT; A RETAINING MEMBER MOUNTED ON SAID BODY; A HOLDING DEVICE BETWEEN AND BEARING AGAINST SAID MEMBERS TO PREVENT LATERAL OUTWARD MOVEMENT OF SAID GRIPPING MEMBER AND TO HOLD SAID GRIPPING MEMBER IN RETRACTED POSITION, SAID DEVICE INCLUDING RELEASABLE MEANS ENGAGING ONE OF SAID MEMBERS AND RELEASABLE BY SAID GRIPPING MEMBER WHEN SAID GRIPPING MEMBER IS SUBJECTED TO A PREDETERMINED FLUID PRESSURE IN SAID PASSAGE TO ALLOW LATERAL OUTWARD EXPANSION OF SAID GRIPPING MEMBER.
References Cited (Backward Citations)
US2792063A
Cited
US3080924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |