US2675083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increasing production from oil and gas wells
Assignee: Pure Oil Co
•
Filing: 1949-09-08
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Granted: 1954-04-13
•
Expires: 1969-09-08
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
- 👤 George G Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:22
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD OF INCREASING THE PERMEABILITY OF SILICEOUS FORMATIONS BY INJECTION THEREIN OF AN ANHYDROUS ACID MATERIAL SELECTED FROM THE GROUP CONSISTING OF HYDROGEN CHLORIDE, HYDROGEN IODIDE, HYDROGEN BROMIDE, SULFUR DIOXIDE, AND SULFUR TRIOXIDE WITH SUFFICIENT PRESSURE TO CAUSE SAID ACID MATERIAL TO PERMEATE AND SUBSTANTIALLY SATURATE SAID FORMATION, THE AMOUNT OF SAID ACID BEING SUFFICIENT TO PREVENT THE PRECIPATION OF GELATINOUS COMPOUNDS OF SILICA, THEREAFTER INJECTING ANHYDROUS HYDROGEN FLUORIDE INTO SAID FORMATION UNDER SUCH CONDITIONS THAT THE REACTION TEMPERATURE IS MAINTAINED AT ABOVE 200* F., THE AMOUNT OF SAID HYDROGEN FLUORIDE BEING 2 TO 10 TIMES THE AMOUNT OF ANHYDROUS ACID, ALLOWING SAID ACID MATERIAL AND HYDROGEN FLUORIDE TO REACT WITH SAID FORMATION FOR AT LEAST ABOUT ONE HOUR, THEREBY TO MAINTAIN THE REACTION PRODUCTS AND CONNATE WATER IN THE GASEOUS PHASE, AND REMOVING THE REACTION PRODUCTS IN THE GASEOUS PHASE.
Claim 2
Independent Claim
142 words
A METHOD OF INCREASING THE PERMEABILITY OF SILICEOUS FORMATIONS BY INJECTION THEREIN OF AN ANHYDROUS ACID MATERIAL SELECTED FROM THE GROUP CONSISTING OF HYDROGEN CHLORIDE, HYDROGEN IODIDE, HYDROGEN BROMIDE, SULFUR DIOXIDE, AND SULFUR TRIOXIDE WITH SUFFICIENT PRESSURE TO CAUSE SAID ACID MATERIAL TO PERMEATE AND SUBSTANTIALLY SATURATE SAID FORMATION, THE AMOUNT OF SAID ACID BEING SUFFICIENT TO PREVENT THE PRECIPATION OF GELATINOUS COMPOUNDS OF SILICA, THEREAFTER INJECTING ANHYDROUS HYDROGEN FLUORIDE INTO SAID FORMATION UNDER SUCH CONDITIONS THAT THE REACTION TEMPERATURE IS MAINTAINED AT ABOVE 200* F., THE AMOUNT OF SAID HYDROGEN FLUORIDE BEING 2 TO 10 TIMES THE AMOUNT OF ANHYDROUS ACID, ALLOWING SAID ACID MATERIAL AND HYDROGEN FLUORIDE TO REACT WITH SAID FORMATION FOR AT LEAST ABOUT ONE HOUR, THEREBY TO MAINTAIN THE REACTION PRODUCTS AND CONNATE WATER IN THE GASEOUS PHASE, AND REMOVING THE REACTION PRODUCTS IN THE GASEOUS PHASE.
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) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |