Patent US3593799A successfully refreshed from Google Patents.
US3593799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sealing a space with a hydrophilic solid gel
Assignee: Dow Chemical Co
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Filing: 1969-07-29
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Granted: 1971-07-20
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Expires: 1989-07-29
Abstract
Abstract A technique is provided for forming watertight enclosed seals against solid surfaces in which sealing pressure is regulated in a moisture containing environment. The sealing materials utilized are hydrophilic solid gels prepared from water soluble polymers in a suitable solvent medium. Pressure on sealing interfaces is regulated by venting the enclosed mass of solid gel. In a preferred embodiment, a bladder containing a readily flowable liquid is incorporated into the solid gel. Venting of the bladder uniformly adjusts pressure throughout the entire seal. Optionally, means may be provided for continuous pressure readings in the solid gel.
Inventors
- 👤 Lowell D Boughton
- 👤 Samuel A Pence Jr
- 👤 Duane L Stude
- 👤 Clare H Kucera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:28
CPC Classifications
E; E21; E21D; E21D5/00; E21D5/012; E21D11/00; E21D11/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A method as in claim 1 wherein the enclosed space is in the annulus between a subterranean shaft and the adjacent formation.
Claim 2
Dependent Claim
14 words
A method as in claim 2 wherein the hydrophilic solid gel is hydraulically prepressurized.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |