US3211230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple zone selective cross-over apparatus
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1963-02-18
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Granted: 1965-10-12
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Expires: 1983-02-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Dewey C Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:14
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
IN APPARATUS FOR CONDUCTING FLUIDS BETWEEN UPPER AND LOWER ZONES IN A WELL BORE AND THE TOP OF THE WELL BORE; A LOWER PACKER SET IN THE WELL BORE BETWEEN THE ZONES; AN UPPER PACKER SET IN THE WELL BORE ABOVE THE UPPER ZONE; A TUBULAR STRING IN THE WELL BORE OPERATIVELY CONNECTED TO SAID PACKERS AND INCLUDING TUBULAR BODY MEANS; MANDREL MEANS MOVABLE MOUNTED IN SAID BODY MEANS; AND WITH RESPECT TO SAID TUBULAR STRING; SAID MANDREL MEANS AND BODY MEANS PROVIDING SEPARATE PASSAGES FOR CONDUCTING FLUIDS FROM THE UPPER AND LOWER ZONES TO THE INTERIOR OF THE TUBULAR STRING ABOVE SAID UPPER PACKER AND TO THE SPACE IN THE WELL BORE ABOVE SAID UPPER PACKER EXTERNALLY OF THE TUBULAR STRING; MEANS FOR LOCATING SAID MANDREL MEANS IN A FIRST POSITION IN SAID BODY MEANS WHEREIN SAID PASSAGES CONDUCT FLUID SEPARATELY FROM THE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |