US4767550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vicinal diol containing monomers and polymers and methods of treating a subterranean formation
Assignee: Halliburton Co
•
Filing: 1987-03-31
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Granted: 1988-08-30
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Expires: 2007-03-31
Abstract
Abstract The present invention provides vicinal diol containing monomers and polymers and methods of preparing and using such monomers and polymers. When crosslinked in aqueous fluids, the polymers form high viscosity gels which are stable at high temperatures.
Inventors
- 👤 David Hanlon
- 👤 Marlin Holtmyer
- 👤 Mike Conway
- 👤 Charles Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:53
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/887; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36; C08F20/52; C08F20/54; C08F20/60; C09K8/02; C09K8/04; C09K8/06; C09K8/12; C09K8/56; C09K8/57; C09K8/575; C09K8/5751; C09K8/5756; C09K8/62; C09K8/66; C09K8/68; C09K8/685; C09K8/72; C09K8/74; Y; Y10; Y10S; Y10S507/00; Y10S507/925; Y10S507/935
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A method of treating a high temperature subterranean formation comprising contacting said formation with a highly viscous gel formed of an aqueous fluid, a water soluble polymer containing crosslinkable vicinal diol groups and a crosslinking agent selected from the group consisting of water soluble salts and complexes of multivalent cations, said water soluble polymer comprising a copolymer containing a monomer having the structural formula: ##STR12## wherein R 1 is hydrogen or methyl; Y is oxygen of NH; R 3 and R 4 are independently methyl or ethyl; n is 2 or 3; and X - is a halogen, sulfate, CH 3 SO 4 or CH 3 COO - .
Claim 2
Independent Claim
109 words
A method of treating a high temperature subterranean formation comprising contacting said formation with a highly viscous gel formed of an aqueous fluid, a water soluble polymer containing crosslinkable vicinal diol groups and a crosslinking agent selected from the group consisting of water soluble salts and complexes of multivalent cations, said water soluble polymer comprising a copolymer containing a monomer having the structural formula: ##STR12## wherein R 1 is hydrogen or methyl; Y is oxygen of NH; R 3 and R 4 are independently methyl or ethyl; n is 2 or 3; and X - is a halogen, sulfate, CH 3 SO 4 or CH 3 COO - .
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein said one or more other polymers are selected from the group consisting of N,N-dimethylacrylamide, acrylamide, methacrylamide, 2-acrylamido-2-methylpropanesulfonic acid, sodium styrene sulfonate, N-vinyl-2-pyrrolidone and acrylic acid.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein said water soluble polymer containing crosslinkable vicinal diol groups is a copolymer of MAPDMDHPAS and NNDMA.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein said water soluble polymer containing crosslinkable vicinal diol groups is a copolymer of MAPDMDHPAC and NNDMA.
Claim 6
Dependent Claim
29 words
The method of claim 1 wherein Y is NH, n is 3, R 1 is methyl, R 3 and R 4 are each methyl and X - is sulfate.
Claim 7
Dependent Claim
31 words
The method of claim 1 wherein Y is NH, n is 3, R 1 is methyl, R 3 and R 4 are each methyl and X - is Cl - .
References Cited (Backward Citations)
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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) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |