US2596843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fracturing formations in wells
Assignee: Stanolind Oil and Gas Co
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Filing: 1949-12-31
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Granted: 1952-05-13
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Expires: 1969-12-31
Abstract
No abstract record available.
Inventors
- 👤 Riley F Farris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:46
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/64; E; E21; E21B; E21B43/00; E21B43/25; E21B43/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A METHOD OF INCREASING THE PRODUCTIVITY OF A FORMATION PENETRATED BY A WELL, COMPRISING DISPOSING IN A CONFINED ZONE IN SAID WELL ADJACENT SAID FORMATION A LOW-PENETRATING FLUID SUFFICIENT TO FRACVISCOSITY GREATER THAN 30 CENTIPOISES AT 20* C. APPLYING A PRESSURE TO SAID FLUID SUFFICIENT TO FRACTURE SAID FORMATION AND TO DISPLACE AT LEAST A PART OF SAID FLUID INTO SAID FORMATION, CONTACTING SAID LOW-PENETRATING FLUID AND A SOLVENT THEREFOR IN AN AMOUNT AND FOR A TIME SUFFICIENT TO REDUCE SUBSTANTIALLY THE VISCOSITY OF THE LIQUID IN SAID PASSAGES AND THEREBY PREVENT CLOGGING OF SAID PASSAGES AND WITHDRAWING THE LIQUID OF RESUCED VISCOSITY FROM THE PASSAGES BY REMOVING LIQUIDS FROM SAID WELL.
References Cited (Backward Citations)
US2300325A
Cited
US2380893A
Cited
US2264353A
Cited
US2332822A
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US2354570A
Cited
US2390609A
Cited
US2379516A
Cited
US2447064A
Cited
US2491641A
Cited
US2477296A
Cited
US2458034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |