Patent US3306360A successfully refreshed from Google Patents.
US3306360A
Expired / Lapsed
US
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Control apparatus for well tool anchor
Assignee: Schlumberger Technology Corp
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Filing: 1965-08-09
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Granted: 1967-02-28
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Expires: 1985-08-09
Abstract
No abstract record available.
Inventors
- 👤 David E Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:44
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295; E21B33/12955
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A PACKER FOR USE IN A WELL CONDUIT COMPRISING: INNER AND OUTER TELESCOPING MEMBERS, PACK-OFF MEANS ON SAID OUTER MEMBER, EXPANDABLE ELEMENTS MOUNTED ON SAID OUTER MEMBER AND HAVING OUTER SURFACES FOR ENGAGING A WELL CONDUIT, AN EXPANDABLE FLUID-TIGHT SLEEVE ON SAID BODY ADJACENT SAID ELEMENTS FOR EXPANDING SAID ELEMENTS INTO ENGAGEMENT WITH A WELL CONDUIT, SAID MEMBERS HAVING A SPACE THEREBETWEEN IN FLUID COMMUNICATION WITH SAID SLEEVE, UPPER AND LOWER SLIDABLE PISTON MEANS IN SAID SPACE AND DEFINING A CLOSED CHAMBER, A FLUID IN SAID CLOSED CHAMBER, MEANS FOR LIMITING MOTION OF SAID PISTONS IN A DIRECTION AWAY FROM ONE ANOTHER, MEANS ON SAID INNER MEMBER FOR RESPECTIVELY ENGAGING SAID PISTON MEANS FOR MOVING A PISTON TO APPLY PRESSURE TO SAID SLEEVE AND ACTUATE SAID ELEMENTS, MEANS ON SAID INNER MEMBER FOR BYPASSING FLUID AROUND ONE OF SAID PISTONS, A PRESSURE CHAMBER IN SAID OUTER MEMBER IN FLUID COMMUNICATION WITH SAID BYPASS MEANS, PISTON MEANS IN SAID PRESSURE CHAMBER, AND SPRING MEANS FOR ACTUATING SAID LAST-MENTIONED PISTON MEANS TO APPLY PRESSURE TO SAID SLEEVE.
Claim 2
Dependent Claim
175 words
A PACKER FOR USE IN A WELL CONDUIT COMPRISING: INNER AND OUTER TELESCOPING MEMBERS, PACK-OFF MEANS ON SAID OUTER MEMBER, EXPANDABLE ELEMENTS MOUNTED ON SAID OUTER MEMBER AND HAVING OUTER SURFACES FOR ENGAGING A WELL CONDUIT, AN EXPANDABLE FLUID-TIGHT SLEEVE ON SAID BODY ADJACENT SAID ELEMENTS FOR EXPANDING SAID ELEMENTS INTO ENGAGEMENT WITH A WELL CONDUIT, SAID MEMBERS HAVING A SPACE THEREBETWEEN IN FLUID COMMUNICATION WITH SAID SLEEVE, UPPER AND LOWER SLIDABLE PISTON MEANS IN SAID SPACE AND DEFINING A CLOSED CHAMBER, A FLUID IN SAID CLOSED CHAMBER, MEANS FOR LIMITING MOTION OF SAID PISTONS IN A DIRECTION AWAY FROM ONE ANOTHER, MEANS ON SAID INNER MEMBER FOR RESPECTIVELY ENGAGING SAID PISTON MEANS FOR MOVING A PISTON TO APPLY PRESSURE TO SAID SLEEVE AND ACTUATE SAID ELEMENTS, MEANS ON SAID INNER MEMBER FOR BYPASSING FLUID AROUND ONE OF SAID PISTONS, A PRESSURE CHAMBER IN SAID OUTER MEMBER IN FLUID COMMUNICATION WITH SAID BYPASS MEANS, PISTON MEANS IN SAID PRESSURE CHAMBER, AND SPRING MEANS FOR ACTUATING SAID LAST-MENTIONED PISTON MEANS TO APPLY PRESSURE TO SAID SLEEVE.
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) | 1970-02-27 | 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 |