US3018826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for increasing the permeability of subterranean formations
Assignee: Union Oil Company of California
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Filing: 1958-06-16
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Granted: 1962-01-30
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Expires: 1978-06-16
Abstract
No abstract record available.
Inventors
- 👤 Burton B Sandiford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:24
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/885; C09K8/62; C09K8/72; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE PROCESS FOR INCREASING THE PERMEABILITY WITH RESPECT TO WATER OF A SUBTERRANEAN FORMATION TRAVERSED BY A WELL BORE WHICH COMPRISES INTRODUCING INTO SAID WELL BORE AN AQUEOUS SOLUTION OF A WATER-SOLUBLE POLYMER OF AN ALKYLENE OXIDE SELECTED FROM THECLASS CONSISTING OF ETHYLENE OXIDE, A PROPLENE OXIDE, AND A BUTYLENE OXIDE, AND FORCING SAID SOLUTION INTO SAID FORMATION, SAID SOLUTION HAVING A VISCOSITY LESS THN 1 CENTIPOISE AT THE FORMATION TEMPERATURE AND CONTAINING BETWEEN ABOUT 0.05 AND ABOUT 10 PARTS PER MILLION OF SAID POLYMER, AND SAID POLYMER HAVING A MOLECULAR WEIGHT SUCH THAT A 5 PERCENT BY WEIGHT AQUEOUS SOLUTION THEREFORE HAS A VISCOSITY OF AT LEAST ABOUT 200 CENTIPOISES AT 20* C.
Claim 2
Dependent Claim
114 words
THE PROCESS FOR INCREASING THE PERMEABILITY WITH RESPECT TO WATER OF A SUBTERRANEAN FORMATION TRAVERSED BY A WELL BORE WHICH COMPRISES INTRODUCING INTO SAID WELL BORE AN AQUEOUS SOLUTION OF A WATER-SOLUBLE POLYMER OF AN ALKYLENE OXIDE SELECTED FROM THECLASS CONSISTING OF ETHYLENE OXIDE, A PROPLENE OXIDE, AND A BUTYLENE OXIDE, AND FORCING SAID SOLUTION INTO SAID FORMATION, SAID SOLUTION HAVING A VISCOSITY LESS THN 1 CENTIPOISE AT THE FORMATION TEMPERATURE AND CONTAINING BETWEEN ABOUT 0.05 AND ABOUT 10 PARTS PER MILLION OF SAID POLYMER, AND SAID POLYMER HAVING A MOLECULAR WEIGHT SUCH THAT A 5 PERCENT BY WEIGHT AQUEOUS SOLUTION THEREFORE HAS A VISCOSITY OF AT LEAST ABOUT 200 CENTIPOISES AT 20* C.
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) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |