US3075581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increasing permeability of subsurface formations
Assignee: ATLANTIC RETINING Co
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Filing: 1960-06-13
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Granted: 1963-01-29
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Expires: 1980-06-13
Abstract
No abstract record available.
Inventors
- 👤 Loyd R Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:09
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/267
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A METHOD FOR INCREASING THE PERMEABILITY TO FLUIDS OF SUBSURFACE EARTH FORMATIONS PENETRATED BY A WELL BORE HAVING A CASING PLACED THEREIN OPPOSITE SAID FORMATIONS, COMPRISING; CREATING A PLURALITY OF PERFORATIONS IN SAID CASING; CREATING FRACTURES IN SAID FORMATION OPPOSITE SOME OF SAID PERFORATIONS; PUMPING INTO SAID FRACTURES A FLUID SUSPENSION OF A MIXTURE OF LARGE, GENERALLY SPHERICAL PROPPING AGENT HAVING A DIAMETER GREATER THAN 0.03 INCH AND SMALL, GENERALLY SPHERICAL PROPPING AGENT HAVING A DIAMETER LESS THAN 0.03 INCH; FILLING THE VOID SPACE BETWEEN SAID FORMATION AND SAID CASING, FORMED BY THE APPLICATION OF PRESSURE THROUGH THOSE OF SAID PERFORATIONS OPPOSITE WHICH NO FRACTURES WERE FORMED DURING THE FRACTURING STEP, WITH A PACK OF SAID MIXTURE OF SUBSTANTIALLY REDUCED PERMEABILITY TO FLUID FLOW; AND THEREAFTER PUMPING INTO SAID FRACTURES A FLUID SUSPENSION OF SAID LARGE PROPPING AGENT ALONE.
Claim 2
Independent Claim
139 words
A METHOD FOR INCREASING THE PERMEABILITY TO FLUIDS OF SUBSURFACE EARTH FORMATIONS PENETRATED BY A WELL BORE HAVING A CASING PLACED THEREIN OPPOSITE SAID FORMATIONS, COMPRISING; CREATING A PLURALITY OF PERFORATIONS IN SAID CASING; CREATING FRACTURES IN SAID FORMATION OPPOSITE SOME OF SAID PERFORATIONS; PUMPING INTO SAID FRACTURES A FLUID SUSPENSION OF A MIXTURE OF LARGE, GENERALLY SPHERICAL PROPPING AGENT HAVING A DIAMETER GREATER THAN 0.03 INCH AND SMALL, GENERALLY SPHERICAL PROPPING AGENT HAVING A DIAMETER LESS THAN 0.03 INCH; FILLING THE VOID SPACE BETWEEN SAID FORMATION AND SAID CASING, FORMED BY THE APPLICATION OF PRESSURE THROUGH THOSE OF SAID PERFORATIONS OPPOSITE WHICH NO FRACTURES WERE FORMED DURING THE FRACTURING STEP, WITH A PACK OF SAID MIXTURE OF SUBSTANTIALLY REDUCED PERMEABILITY TO FLUID FLOW; AND THEREAFTER PUMPING INTO SAID FRACTURES A FLUID SUSPENSION OF SAID LARGE PROPPING AGENT ALONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |