US2785752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of siliceous geological formations with fluophosphoric acid
Assignee: Pure Oil Co
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Filing: 1953-09-22
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Granted: 1957-03-19
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Expires: 1973-09-22
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
- 👤 Jr Allyn T Sayre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:34
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; Y; Y10; Y10S; Y10S507/00; Y10S507/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
AN INTEGRATED PROCESS FOR IMPROVING THE FLUID FLOW CHARACTERISTICS AND PRODUCTIVITY OF A SILICON GEOLOGICAL FORMATION HAVING A PERMEABILITY NOT GREATER THAN ABOUT 10 MILLIDARCIES TRAVERSED BY A BOREHOLE WHICH COMPRISES INITIALLY CONTACTING SAID FORMATION WITH AN AQUEOUS SOLUTION HAVING A FLUOPHOSPHORIC ACID CONCENTRATION OF ABOUT 5-10% BY WEIGHT IN AN AMOUNT SUFFICIENT TO REACT THEREWITH, AND THEREAFTER UTILIZING AN AQUEOUS FLUOPHOSPHORIC ACID SOLUTION HAVING A CONCENTRATION IN EXCESS OF THAT ACID CONCENTRATION INITIALLY EMPLOYED IN AN AMOUNT SUFFICIENT TO REACT FURTHER WITH THE FORMATION AND SUBSEQUENTLY FORCING INTO THE FORMATION A VISCOUS HYDRAULIC FRACTURING FLUID SELECTED FROM THE GROUP CONSISTING OF AN ALUMINUM SOAPPETROLEUM HYDROCARBON COLLOIDAL GEL, A GELLED MINERAL ACID, AND AN ASPHALTIC RESIDUAL PETROLEUM OIL, AND APPLYING PRESSURE TO SAID FLUID TO PRODUCE WITHIN THE FORMATION A PRESSURE SUFFICIENT TO FRACTURE SAID FORMATION.
Claim 2
Dependent Claim
136 words
AN INTEGRATED PROCESS FOR IMPROVING THE FLUID FLOW CHARACTERISTICS AND PRODUCTIVITY OF A SILICON GEOLOGICAL FORMATION HAVING A PERMEABILITY NOT GREATER THAN ABOUT 10 MILLIDARCIES TRAVERSED BY A BOREHOLE WHICH COMPRISES INITIALLY CONTACTING SAID FORMATION WITH AN AQUEOUS SOLUTION HAVING A FLUOPHOSPHORIC ACID CONCENTRATION OF ABOUT 5-10% BY WEIGHT IN AN AMOUNT SUFFICIENT TO REACT THEREWITH, AND THEREAFTER UTILIZING AN AQUEOUS FLUOPHOSPHORIC ACID SOLUTION HAVING A CONCENTRATION IN EXCESS OF THAT ACID CONCENTRATION INITIALLY EMPLOYED IN AN AMOUNT SUFFICIENT TO REACT FURTHER WITH THE FORMATION AND SUBSEQUENTLY FORCING INTO THE FORMATION A VISCOUS HYDRAULIC FRACTURING FLUID SELECTED FROM THE GROUP CONSISTING OF AN ALUMINUM SOAPPETROLEUM HYDROCARBON COLLOIDAL GEL, A GELLED MINERAL ACID, AND AN ASPHALTIC RESIDUAL PETROLEUM OIL, AND APPLYING PRESSURE TO SAID FLUID TO PRODUCE WITHIN THE FORMATION A PRESSURE SUFFICIENT TO FRACTURE SAID FORMATION.
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) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |