US2774431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for increasing production from wells
Assignee: Union Oil Company of California
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Filing: 1954-08-25
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Granted: 1956-12-18
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Expires: 1974-08-25
Abstract
No abstract record available.
Inventors
- 👤 John E Sherborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:41
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/64; E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/267
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A PROCESS FOR INCREASING THE PRODUCTIVITY OF A SUBTERRANEAN OIL-PRODUCING FORMATION PENETRATED BY A WELL BORE WHEREIN (1) A VISCOUS FLUID CONTAINING A PARTICULATE SOLID PROPPING AGENT IS FORCED DOWN SAID WELL AND INTO SAID FORMATION UNDER A PRESSURE SUFFICIENT TO FRACTURE SAID FORMATION, (2) SAID FLUID IS THEREAFTER WITHDRAWN FROM THE FRACTURES SO FORMED LEAVING SAID PROPPING AGENT DEPOSITED WITHIN SAID FRACTURES, (3) SAID WELL IS THEREAFTER PLACED IN PRODUCING CONDITION, AND (4) SAID SEQUENCE OF STEPS IS REPEATED ONE OR MORE TIMES, THE IMPROVEMENT WHICH CONSISTS IN INCREASING THE PARTICLE SIZE OF SAID PROPPING AGENT IN EACH SUCCEEDING FRACTURING STEP.
Claim 2
Dependent Claim
103 words
IN A PROCESS FOR INCREASING THE PRODUCTIVITY OF A SUBTERRANEAN OIL-PRODUCING FORMATION PENETRATED BY A WELL BORE WHEREIN (1) A VISCOUS FLUID CONTAINING A PARTICULATE SOLID PROPPING AGENT IS FORCED DOWN SAID WELL AND INTO SAID FORMATION UNDER A PRESSURE SUFFICIENT TO FRACTURE SAID FORMATION, (2) SAID FLUID IS THEREAFTER WITHDRAWN FROM THE FRACTURES SO FORMED LEAVING SAID PROPPING AGENT DEPOSITED WITHIN SAID FRACTURES, (3) SAID WELL IS THEREAFTER PLACED IN PRODUCING CONDITION, AND (4) SAID SEQUENCE OF STEPS IS REPEATED ONE OR MORE TIMES, THE IMPROVEMENT WHICH CONSISTS IN INCREASING THE PARTICLE SIZE OF SAID PROPPING AGENT IN EACH SUCCEEDING FRACTURING STEP.
References Cited (Backward Citations)
US2354570A
Cited
US2596843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |