US2664165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increasing productivity of siliceous geological formations
Assignee: Pure Oil Co
•
Filing: 1951-08-17
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Granted: 1953-12-29
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Expires: 1971-08-17
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:33
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/845; Y; Y10; Y10S; Y10S507/00; Y10S507/922; Y10S507/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD FOR INCREASING THE PERMEABILITY OF A SILICEOUS SUBTERRANEAN GEOLOGICAL FORMATION TRAVERSED BY A BORE HOLE THE STEPS WHICH COMPRISE HYDRAULICALLY FRACTUREING SAID FORMATION BY FORCING THEREINTO A HIGHLY VISCOUS COLLOIDAL GEL TO PRODUCE WITHIN SAID FORMATION A PRESSURE IN EXCESS OF THE STATE FORMATION OVERBURDEN PRESSURE AND SUFFICIENT TO FRACTURE SAID FORMATION, FORCING INTO SAID FRACTURED FORMATION A FLUOPHOSPHORIC ACID SOLUTION IN AN AMOUNT SUFFICIENT TO REACT WITH SAID FORMATION, PEPTIZING SAID COLLOIDAL GEL TO PRODUCE A LOW VISCOSITY SOL, AND FLUSHING SAID SOL, UNREACTED ACID, AND EFFLUENT REACTION PRODUCTS FROM SAID FORMATION.
Claim 2
Independent Claim
95 words
A METHOD FOR INCREASING THE PERMEABILITY OF A SILICEOUS SUBTERRANEAN GEOLOGICAL FORMATION TRAVERSED BY A BORE HOLE THE STEPS WHICH COMPRISE HYDRAULICALLY FRACTUREING SAID FORMATION BY FORCING THEREINTO A HIGHLY VISCOUS COLLOIDAL GEL TO PRODUCE WITHIN SAID FORMATION A PRESSURE IN EXCESS OF THE STATE FORMATION OVERBURDEN PRESSURE AND SUFFICIENT TO FRACTURE SAID FORMATION, FORCING INTO SAID FRACTURED FORMATION A FLUOPHOSPHORIC ACID SOLUTION IN AN AMOUNT SUFFICIENT TO REACT WITH SAID FORMATION, PEPTIZING SAID COLLOIDAL GEL TO PRODUCE A LOW VISCOSITY SOL, AND FLUSHING SAID SOL, UNREACTED ACID, AND EFFLUENT REACTION PRODUCTS FROM SAID FORMATION.
References Cited (Backward Citations)
US1990969A
Cited
US2386605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |