US3288222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Progressively expanded packing element for a bridge plug
Assignee: Schlumberger Well Surveying Corp
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Filing: 1964-03-11
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Granted: 1966-11-29
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Expires: 1984-03-11
Abstract
No abstract record available.
Inventors
- 👤 Harold J Urbanosky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:21
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/1208; E21B33/128
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
AS A SUB-COMBINATION, A PACKING ELEMENT ADAPTED FOR EXPANSION INTO SEALING ENGAGEMENT WITH A WELL BORE, SAID PACKING ELEMENT CONSISTING OF: A PLURALITY OF ELASTOMERIC ELONGATED ANNULAR PLIES BONDED TOGETHER TO FORM A UNITARY TUBULAR HAVING A WALL OF UNIFORM THICKNESS, EACH OF SAID PLIES BEING OF AN ELASTOMERIC MATERIAL HAVING AT LEAST A DIFFERENT MODULUS OF ELASTICITY THAN THAT OF AT LEAST ANOTHER ONE OF SAID PLIES WITH EACH BEING UNIFORMLY TAPERED FROM A FIRST THICKNESS AT EACH END THEREOF TO A SECOND THICKNESS AT THE CENTRAL PORTION THEREOF, SAID PLIES BEING COOPERATIVELY PROPORTIONED AND ARRANGED IN SUCH A MANNER THAT THE COMPOSITE MODULUS OF ELASTICITY AT ANY TRANSVERSE SECTION OF SAID TUBULAR MEMBER PROGRESSIVELY INCREASES FROM THE CENTRAL PORTION THEREOF TOWARD EACH END OF SAID TUBULAR MEMBER.
References Cited (Backward Citations)
US1050557A
Cited
US2449514A
Cited
US2612953A
Cited
US2602513A
Cited
US2624603A
Cited
US2738015A
Cited
US3083775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |