US3225831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for packing off multiple tubing strings
Assignee: Hydril LLC
•
Filing: 1962-04-16
•
Granted: 1965-12-28
•
Expires: 1982-04-16
Abstract
No abstract record available.
Inventors
- 👤 Granville S Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:07
CPC Classifications
F; F16; F16L; F16L39/00; E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/047; E21B33/06; E21B2200/00; E21B2200/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN COMBINATION, A RADIALLY CONSTRICTABLE SEALING ANNULUS HAVING A BORE FORMING A VERTICAL PASSAGE THERETHROUGH, FOR PASSING PARALLEL WELL TUBING STRINGS, AND A PACKER BODY OF ELASTOMERIC MATERIAL INSERTED DOWNWARDLY INTO SAID PASSAGE, SAID BODY HAVING SPACED APART GENERALLY PARALLEL RECESSES EXTENDING GENERALLY VERTICALLY BETWEEN OPPOSITE ENDS OF SAID BODY AND WHICH ARE OPEN GENERALLY TOWARD SAID BORE AND ALONG THE BODY EXTENT BETWEEN SAID ENDS IN OFFSET RELATION TO THE BODY AXIS, SAID RECESSES BEING SIZED TO RECEIVE SPACED GENERALLY PARALLEL WELL TUBING STRINGS WHICH ARE RUN ENDWISE THERETHROUGH WHEN THE
Claim 2
Dependent Claim
92 words
IN COMBINATION, A RADIALLY CONSTRICTABLE SEALING ANNULUS HAVING A BORE FORMING A VERTICAL PASSAGE THERETHROUGH, FOR PASSING PARALLEL WELL TUBING STRINGS, AND A PACKER BODY OF ELASTOMERIC MATERIAL INSERTED DOWNWARDLY INTO SAID PASSAGE, SAID BODY HAVING SPACED APART GENERALLY PARALLEL RECESSES EXTENDING GENERALLY VERTICALLY BETWEEN OPPOSITE ENDS OF SAID BODY AND WHICH ARE OPEN GENERALLY TOWARD SAID BORE AND ALONG THE BODY EXTENT BETWEEN SAID ENDS IN OFFSET RELATION TO THE BODY AXIS, SAID RECESSES BEING SIZED TO RECEIVE SPACED GENERALLY PARALLEL WELL TUBING STRINGS WHICH ARE RUN ENDWISE THERETHROUGH WHEN THE
References Cited (Backward Citations)
US2430164A
Cited
US2609836A
Cited
US2639312A
Cited
US2619553A
Cited
US2723721A
Cited
US3007719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |