Patent US2672936A successfully refreshed from Google Patents.
US2672936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fracturing rock formations
Assignee: Pure Oil Co
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Filing: 1952-12-26
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Granted: 1954-03-23
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Expires: 1972-12-26
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:25
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; Y; Y10; Y10S; Y10S507/00; Y10S507/922; Y10S507/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD FOR INCREASING THE PERMEABILITY AND POROSITY OF A FLUID-CONTAINING SUBTERRANEAN RESERVOIR TRAVERSED BY A BOREHOLE WHICH COMPRISES INTRODUCING INTO THE RESERVOIR IN THE AREAS HAVING SUBSTANTIALLY DISCONTINUOUS INTERSTICES A VISCOUS MEDIUM COMPRISING AN AQUEOUS SOLUTION OF A FLUOPHOSPHORIC ACID WHICH HAS BEEN SPENT BY CONTACTING SAID ACID WITH SILICA AND THEREAFTER APPLYING TO SAID VISCOUS MEDIUM A FORCE SUFFICIENT TO DEVELOP WITHIN SAID INTERSTICES A PRESSURE IN EXCESS OF THE OVERBURDEN PRESSURE OF SAID RESERVOIR THEREBY PRODUCING FRACTURES WITHIN SAID RESERVOIR WHICH EXTEND RADIALLY FROM THE BORE HOLE AND INCREASE THE PRODUCTION RATE AND POROSITY OF THE RESERVOIR.
Claim 2
Independent Claim
100 words
THE METHOD FOR INCREASING THE PERMEABILITY AND POROSITY OF A FLUID-CONTAINING SUBTERRANEAN RESERVOIR TRAVERSED BY A BOREHOLE WHICH COMPRISES INTRODUCING INTO THE RESERVOIR IN THE AREAS HAVING SUBSTANTIALLY DISCONTINUOUS INTERSTICES A VISCOUS MEDIUM COMPRISING AN AQUEOUS SOLUTION OF A FLUOPHOSPHORIC ACID WHICH HAS BEEN SPENT BY CONTACTING SAID ACID WITH SILICA AND THEREAFTER APPLYING TO SAID VISCOUS MEDIUM A FORCE SUFFICIENT TO DEVELOP WITHIN SAID INTERSTICES A PRESSURE IN EXCESS OF THE OVERBURDEN PRESSURE OF SAID RESERVOIR THEREBY PRODUCING FRACTURES WITHIN SAID RESERVOIR WHICH EXTEND RADIALLY FROM THE BORE HOLE AND INCREASE THE PRODUCTION RATE AND POROSITY OF THE RESERVOIR.
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) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |