US3306361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double set hydraulic anchor
Assignee: Schlumberger Technology Corp
•
Filing: 1964-06-11
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Granted: 1967-02-28
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Expires: 1984-06-11
Abstract
No abstract record available.
Inventors
- 👤 Maurice P Lebourg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:52
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
56 words
A WELL PACKER SIZED AND ADAPTED FOR RECEPTION IN A WELL BORE INCLUDING: MEANS FOR PACKING-OFF A WELL BORE; MEANS RESPONSIVE TO HYDRAULIC PRESSURE FOR ANCHORING SAID WELL PACKER RELATIVE TO THE WALL OF A WELL BORE; AND MEANS FOR APPLYING HYDRAULIC PRESSURE TO SAID ANCHORING MEANS IN RESPONSE TO A PRESSURE DIFFERENTIAL ACTING FROM EITHER
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Cited
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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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |