US3333634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary recovery method achieving high macroscopic and microscopic sweep efficiency
Assignee: Mobil Oil AS
•
Filing: 1965-06-29
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Granted: 1967-08-01
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Expires: 1985-06-29
Abstract
No abstract record available.
Inventors
- 👤 Harold L Townsend
- 👤 James M Mcmillen
- 👤 Jr Sherrod A Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:27
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A METHOD FOR RECOVERING OIL FROM A SUBTERRANEAN FORMATION, THE IMPROVEMENT COMPRISING THE STEP OF INJECTING INTO SAID FORMATION AN ACTIVE SOLUTION COMPRISING WATER CONTAINING AN ADDITIVE SYSTEM IN SUFFICIENT QUANTITIES TO LOWER INTERFACIAL TENSION WITH THE OIL AND TO IMPART VISCOELASSTIC, SHEAR HARDENING, AND POSITIVE NONSIMPLE RHEOLOGICAL PROPERTIES THERETO, SAID ADDITIVE SYSTEM COMPRISING: (A) A STRONG ELECTROLYTE; (B) AN ALKYL ARYL OXYPOLY(ETHOXY)ETHANOL HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 2
Dependent Claim
69 words
IN A METHOD FOR RECOVERING OIL FROM A SUBTERRANEAN FORMATION, THE IMPROVEMENT COMPRISING THE STEP OF INJECTING INTO SAID FORMATION AN ACTIVE SOLUTION COMPRISING WATER CONTAINING AN ADDITIVE SYSTEM IN SUFFICIENT QUANTITIES TO LOWER INTERFACIAL TENSION WITH THE OIL AND TO IMPART VISCOELASSTIC, SHEAR HARDENING, AND POSITIVE NONSIMPLE RHEOLOGICAL PROPERTIES THERETO, SAID ADDITIVE SYSTEM COMPRISING: (A) A STRONG ELECTROLYTE; (B) AN ALKYL ARYL OXYPOLY(ETHOXY)ETHANOL HAVING THE FOLLOWING STRUCTURAL FORMULA:
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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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |