US4424859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-channel fluid injection system
Assignee: Individual
•
Filing: 1981-11-04
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Granted: 1984-01-10
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Expires: 2001-11-04
Abstract
Abstract Method and apparatus for introducing fluid into a wellbore through use of a multi-channel conduit.
Inventors
- 👤 Coleman W. Sims
- 👤 W. P. Sims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:22
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/124; E21B33/1243; E21B17/00; E21B17/02; E21B17/04; E21B17/06; E21B17/18; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
An apparatus for injecting fluid into hydrocarbon-containing subsurface formations, said apparatus comprising: (a) A multi-channel conduit adapted to simultaneously transport fluid from a wellhead to a plurality of treatment zones within a wellbore; (b) A wellhead fitting communicating with the multi-channel conduit, said wellhead fitting adapted to introduce fluid into at least two channels of said multi-channel conduit; (c) Packing elements for confining fluid transported through each channel of said multi-channel conduit to a single treatment zone within the wellbore; and (d) Back-off means positioned above each of said packing elements, said back-off means being adapted to disengage said multi-channel conduit from said packing element when subjected to a rotational shearing force less than the torsional stress required to permanently deform said multi-channel conduit.
Claim 2
Independent Claim
124 words
An apparatus for injecting fluid into hydrocarbon-containing subsurface formations, said apparatus comprising: (a) A multi-channel conduit adapted to simultaneously transport fluid from a wellhead to a plurality of treatment zones within a wellbore; (b) A wellhead fitting communicating with the multi-channel conduit, said wellhead fitting adapted to introduce fluid into at least two channels of said multi-channel conduit; (c) Packing elements for confining fluid transported through each channel of said multi-channel conduit to a single treatment zone within the wellbore; and (d) Back-off means positioned above each of said packing elements, said back-off means being adapted to disengage said multi-channel conduit from said packing element when subjected to a rotational shearing force less than the torsional stress required to permanently deform said multi-channel conduit.
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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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |