US4444403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal and/or corrosion seal for a well tool
Assignee: Camco Inc
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Filing: 1982-06-21
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Granted: 1984-04-24
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Expires: 2002-06-21
Abstract
Abstract A seal on a well tool for sealing off the space between two well members consisting of an encapsulated polyelastic thermal and/or corrosive seal. The seal includes an outer protective layer which physically protects the seal as it is moved into place and set and which is preferably of a plastic. A second pliable layer is encapsulated in the first outer layer and is impervious to well fluids. Preferably the second layer is a corrugated shaped metal layer. A third layer is encapsulated within the second layer and is an elastic material such as an elastomer.
Inventors
- 👤 Arthur J. Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:14
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/1208; F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
In a well tool having an expandable seal for sealing off the space between two well members, the improvement in an expandable seal for overcoming high thermal and/or corrosive environments comprising, an outer protective layer, a second pliable layer encapsulated in the outer first layer, said second layer being impervious to well fluids and being a flexible metal, and a third layer encapsulated within the second layer being of an elastic material.
Claim 2
Dependent Claim
72 words
In a well tool having an expandable seal for sealing off the space between two well members, the improvement in an expandable seal for overcoming high thermal and/or corrosive environments comprising, an outer protective layer, a second pliable layer encapsulated in the outer first layer, said second layer being impervious to well fluids and being a flexible metal, and a third layer encapsulated within the second layer being of an elastic material.
Claim 3
Dependent Claim
76 words
In a well tool having an expandable seal for sealing off the space between two well members, the improvement in a seal for overcoming high thermal and/or corrosive environments comprising, an outer protective plastic layer, a second layer encapsulated in the outer layer, said second layer being flexible and impervious to well fluids, said second layer being a corrugated shaped metal, and a third layer encapsulated within the second layer and being of an elastic material.
Claim 4
Dependent Claim
76 words
In a well tool having an expandable seal for sealing off the space between two well members, the improvement in a seal for overcoming high thermal and/or corrosive environments comprising, an outer protective plastic layer, a second layer encapsulated in the outer layer, said second layer being flexible and impervious to well fluids, said second layer being a corrugated shaped metal, and a third layer encapsulated within the second layer and being of an elastic material.
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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |