Patent US3249149A successfully refreshed from Google Patents.
US3249149A
Expired / Lapsed
US
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High pressure well packer
Assignee: Camco Inc
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Filing: 1964-01-02
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Granted: 1966-05-03
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Expires: 1984-01-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Harold E Mcgowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:42
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295; E21B33/12955
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
147 words
IN A WELL PACKER ASSEMBLY HAVING A LOWER SLIP SUBASSEMBLY, A TUBING STRING MANDREL SLIDABLY PROJECTED THROUGH THE SLIP SUBASSEMBLY, A PACKING COLLAR MANDREL SLEEVED ON THE TUBING STRING MANDREL ABOVE SAID SLIP SUBASSEMBLY FOR RELATIVE MANDREL RECIPROCATION, A FLUID PASSAGEWAY THROUGH THE PACKING COLLAR MANDREL, MATING SEALING SURFACES ON SAID MANDRELS ARRANGED TO BE BROUGHT INTO SEATING CONTACT ONE WITH THE OTHER AT ONE LIMIT OF RELATIVE MANDREL RECIPROCATION FOR THEREBY CLOSING THE UPPER END OF SAID FLUID PASSAGEWAY, A LATCH DOG KEEPER FORMATION ON ONE OF SAID MANDRELS, A HYDRAULICALLY ACTUAATED AND LATERALLY PROJECTABLE LATCH DOG POSITIONED BY THE OTHER MANDREL FOR ALIGNMENT WITH SAID KEEPER FORMATION AT SAID LAST MENTIONED LIMIT OF MANDREL RECIPROCATION AND MEANS TO DIRECT ACTUATING FLUID FROM SAID PASSAGEWAY INTO LATCH DOG PROJECTING RELATION WHEN SAID UPPER END OF THE PASSAGEWAY IS CLOSED BY SEATING CONTACT OF SAID SEALING SURFACES.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |