US3692113A
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Oil recovery process using polyalkene oxide polymer solutions with added cations
Assignee: Marathon Oil Co
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Filing: 1970-10-09
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Granted: 1972-09-19
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Expires: 1990-10-09
Abstract
Abstract Oil is displaced from oil-bearing formations by injecting into the formations aqueous compositions which include polyalkene oxide polymers and controlled quantities of alkaline earth metal ions. Similar compositions can also be used as viscosity increasing ingredients in other applications.
Inventors
- 👤 Charles J Norton
- 👤 David O Falk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:52
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/588
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
26 words
Processes according to claim 1 wherein the polyalkene oxide polymer has a molecular weight above 100,000 prior to the addition of said alkaline earth metal ions.
Claim 2
Dependent Claim
32 words
Processes according to claim 1 whErein the polyalkene oxide polymer is present in a concentration of from about 0.001 to about 5 percent be weight based on the weight of the water.
Claim 3
Dependent Claim
28 words
Processes according to claim 1 wherein the polyalkene oxide has a molecular weight of from 1,000,000 to about 10,000,000 prior to the addition of alkaline earth metal ions.
Claim 4
Dependent Claim
28 words
Processes according to claim 1 wherein said polyalkene oxide polymer has a concentration of 0.01 to about 1 percent by weight based on the weight of the water.
Claim 5
Dependent Claim
35 words
Processes according to claim 1 wherein the total composition of said alkaline earth metal ions is from about 10 to about 300, 000 parts per million by weight based on the weight of the water.
Claim 6
Dependent Claim
14 words
Processes according to claim 1 wherein the polyalkene oxide comprises groups containing the structure:
Claim 7
Dependent Claim
26 words
The Processes of claim 10 wherein R'', R'''', R'''''', and R'''''''' each contain from 1 to 6 carbon atoms, the balance of the substituents being hydrogen.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |