Patent DE498449C successfully refreshed from Google Patents.
US3198253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic fracturing
Assignee: Sinclair Research Inc
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Filing: 1960-07-08
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Granted: 1965-08-03
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Expires: 1980-07-08
Abstract
No abstract record available.
Inventors
- 👤 Don R Holbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:54
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN A METHOD FOR INCREASING THE PERMEABILITY OF AN OIL-BEARING FORMATION, THE STEPS COMPRISING PLACING A FRACTURING LIQUID IN CONTACT WITH THE OIL-BEARING FORMATION, EXERTING A PRESSURE ON THE LIQUID TO FRACTURE HYDRAULICALLY THE OIL-BEARING FORMATION, INTRODUCING INTO THE FRACTURED FORMATION AN AQUEOUS PLUG-FORMING COMPOSITION HAVING A VISCOSITY OF ABOUT 1 TO 15 CENTIPOISES AND A SPECIFIC GRAVITY GREATER THAN THE IN-SITU OIL AND IN AN AMOUNT OF AT LEAST ABOUT 25% OF THE VOLUME OF THE FRACTURING LIQUID, INTRODUCING A FLUSHING LIQUID INTO THE FRACTURED FORMATION PRIOR TO THE PLUG-FORMING COMPOSITION BEING TRANSFORMED INTO THE PLUGGING STATE, SAID SLUSHING LIQUID HAVING A SPECIFIC GRAVITY LESS THAN FORMATION BRINE AND LESS THAN THE PLUG-FORMING COMPOSITION AND CONSTITUTING ABOUT 10 TO 75% OF THE VOLUME OF THE FRACTURING LIQUID AND ALLOWING THE PLUG-FORMING COMPOSITION TO TRANSFORM INTO AN ESSENTIALLY SOLID, FORMATION-PLUGGING STATE.
Claim 2
Dependent Claim
141 words
IN A METHOD FOR INCREASING THE PERMEABILITY OF AN OIL-BEARING FORMATION, THE STEPS COMPRISING PLACING A FRACTURING LIQUID IN CONTACT WITH THE OIL-BEARING FORMATION, EXERTING A PRESSURE ON THE LIQUID TO FRACTURE HYDRAULICALLY THE OIL-BEARING FORMATION, INTRODUCING INTO THE FRACTURED FORMATION AN AQUEOUS PLUG-FORMING COMPOSITION HAVING A VISCOSITY OF ABOUT 1 TO 15 CENTIPOISES AND A SPECIFIC GRAVITY GREATER THAN THE IN-SITU OIL AND IN AN AMOUNT OF AT LEAST ABOUT 25% OF THE VOLUME OF THE FRACTURING LIQUID, INTRODUCING A FLUSHING LIQUID INTO THE FRACTURED FORMATION PRIOR TO THE PLUG-FORMING COMPOSITION BEING TRANSFORMED INTO THE PLUGGING STATE, SAID SLUSHING LIQUID HAVING A SPECIFIC GRAVITY LESS THAN FORMATION BRINE AND LESS THAN THE PLUG-FORMING COMPOSITION AND CONSTITUTING ABOUT 10 TO 75% OF THE VOLUME OF THE FRACTURING LIQUID AND ALLOWING THE PLUG-FORMING COMPOSITION TO TRANSFORM INTO AN ESSENTIALLY SOLID, FORMATION-PLUGGING STATE.
References Cited (Backward Citations)
US2856380A
Cited
US2782857A
Cited
US2792893A
Cited
US2827121A
Cited
US2801985A
Cited
US2842206A
Cited
US3044550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |