Patent US3294122A successfully refreshed from Google Patents.
US3294122A
Expired / Lapsed
US
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Tubing protector
Assignee: Mobil Oil AS
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Filing: 1963-12-30
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Granted: 1966-12-27
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Expires: 1983-12-30
Abstract
No abstract record available.
Inventors
- 👤 Lorld G Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:38
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1042
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
146 words
A PROTECTED TUBING ASSEMBLY FOR USE IN A WELL SEPARATELY COMPLETED IN MORE THAN ONE SUBTERRANEAN FORMATION WHEREIN A FLUID STREAM CONTAINING PARTICULATE MATTER IMPINGES THEREON WHICH COMPRISES TUBING AND A SLEEVE COMPRISING A PLURALITY OF ELASTOMERIC SECTIONS RADIALLY STRETCHED ABOUT SAID TUBING AND HELD IN STRETCHED CONDITION THEREBY, EACH SECTION WHEN RELAXED HAVING A BORE OF LESSER DIAMETER THAN THE OUTER DIAMETER OF SAID TUBING, A PORTION OF REDUCED OUTER DIAMETER ON ONE END THEREOF, AND INTERNAL ANNULAR RECESS PROVIDE INSIDE THE OTHER END THEREOF, SAID RECESS AND SAID REDUCED END PORTION BEING COMPLEMENTARY IN SHAPE AND LENGTH AND JOINED SO THAT THE REDUCED END PORTION FILLS THE RECESS AND THE OVERLAPPED ENDS ARE IN ELASTICALLY GRIPPED AND SEALED RELATIONSHIP, AND AN OUTER SURFACE CONTINUOUSLY CURVING AT A RADIUS BETWEEN 0.025 INCH AND 0.25 INCH TO MINIMIZE THE SURFACE AREA NORMAL TO THE IMPINGING STREAM.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |