Patent US3342261A successfully refreshed from Google Patents.
US3342261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for recovering oil from subterranean formations
Assignee: Union Oil Company of California
•
Filing: 1965-04-30
•
Granted: 1967-09-19
•
Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:10
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/17; E21B43/24; E21B43/243; E21B43/25; E21B43/26; E21B43/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A PROCESS FOR RECOVERING OIL FROM A SUBTERRANEAN FORMATION PENETRATED BY AT LEAST ONE INJECTION WELL AND ONE PRODUCTION WELL IN WHICH THE FORMATION IS SUCCESSIVELY FRACTURED TO ESTABLISH FLUID COMMINICATION BETWEEN THE INJECTION WELL AND THE PRODUCTION WELL AND SUBJECTED TO A RECOVERY OPERATION CONDUCTED DOEXTENSIVE WITH THE FRACTURE TO RECOVER OIL FROM THE FORMATION ADJACENT THE FRACTURE UNTIL SAID ADJACENT FORMATION IS SUBSTANTIALY DEPLETED OF OIL WHEREUPON THE FRACTURING AND RECOVERY STEPS ARE REPEATED, THE IMPROVEMENT WHICH COMPRISES DISPOSING A TENACIOUS FOAM IN THE OIL DEPLETED FRACTURE PRIOR TO INITIATING SUBSEQUENT FRACTURING AND RECOVERING STEPS.
Claim 2
Dependent Claim
98 words
IN A PROCESS FOR RECOVERING OIL FROM A SUBTERRANEAN FORMATION PENETRATED BY AT LEAST ONE INJECTION WELL AND ONE PRODUCTION WELL IN WHICH THE FORMATION IS SUCCESSIVELY FRACTURED TO ESTABLISH FLUID COMMINICATION BETWEEN THE INJECTION WELL AND THE PRODUCTION WELL AND SUBJECTED TO A RECOVERY OPERATION CONDUCTED DOEXTENSIVE WITH THE FRACTURE TO RECOVER OIL FROM THE FORMATION ADJACENT THE FRACTURE UNTIL SAID ADJACENT FORMATION IS SUBSTANTIALY DEPLETED OF OIL WHEREUPON THE FRACTURING AND RECOVERY STEPS ARE REPEATED, THE IMPROVEMENT WHICH COMPRISES DISPOSING A TENACIOUS FOAM IN THE OIL DEPLETED FRACTURE PRIOR TO INITIATING SUBSEQUENT FRACTURING AND RECOVERING STEPS.
References Cited (Backward Citations)
US2053285A
Cited
US3004594A
Cited
US2866507A
Cited
US3136361A
Cited
US3185634A
Cited
US3196944A
Cited
US3245470A
Cited
US3269460A
Cited
US3284281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |