US3307630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acidizing oil formations
Assignee: Shell USA Inc
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Filing: 1964-06-12
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Granted: 1967-03-07
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Expires: 1984-06-12
Abstract
No abstract record available.
Inventors
- 👤 Richard E Dilgren
- 👤 Frank M Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:54
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
A METHOD OF TREATING A SUBTERRANEAN FORMATION PENETRATED BY A WELL BORE TO INCREASE THE PERMEABILITY OF SAID FORMATION, SAID METHOD COMPRISING EMULSIFYING A MIXTURE OF AN ORGANIC HALIDE AND WATER WITH AN EMULSIFYING AGENT TO FORM AN EMULSION STABLE UNDER CONDITIONS EXISTING AT SAID SUBTERRANEAN FORMATION, IN WHICH EMULSION THE ORGANIC HALIDE IS MIXED WITH A STOICHIOMETRIC EXCESS OF WATER AND IS SUBSTANTIALLY COMPLETELY HYDROLYZED, PUMPING SAID EMULSIFIED MIXTURE OF ORGANIC HALIDE AND WATER DOWN SAID WELL AS THE ORGANIC HALIDE STARTS TO HYDROLYZE, INJECTING SAID EMULSIFIED MIXTURE OF ORGANIC HALIDE AND WATER INTO SAID SUBTERRANEAN FORMATION IN A RADIALLY EXTENSIVE ZONE AROUND THE WELL AT A RATE SUCH THAT THE MAJOR PORTION OF THE REACTION PRODUCT HYDROGEN HALIDE FORMED BY SAID HYDROLYZING ORGANIC HALIDE IS FORMED WITHIN SAID FORMATION AND A GREATER PORTION OF THE HYDROGEN HALIDE IS FORMED IN THE VICINITY OF THE WELL WITH A LESSER PORTION OF SAID HYDROGEN HALIDE BEING FORMED AT RADIALLY EXTENSIVE DISTANCES FROM SAID WELL, AND MAINTAINING SAID INJECTED MIXTURE IN SAID FORMATION FOR A TIME SUFFICIENT FOR THE REACTION PRODUCT HYDROGEN HALIDE TO REACT WITH AND DISSOLVE A PORTION OF SAID FORMATION TO INCREASE THE PERMEABILITY THEREOF.
Claim 2
Independent Claim
197 words
A METHOD OF TREATING A SUBTERRANEAN FORMATION PENETRATED BY A WELL BORE TO INCREASE THE PERMEABILITY OF SAID FORMATION, SAID METHOD COMPRISING EMULSIFYING A MIXTURE OF AN ORGANIC HALIDE AND WATER WITH AN EMULSIFYING AGENT TO FORM AN EMULSION STABLE UNDER CONDITIONS EXISTING AT SAID SUBTERRANEAN FORMATION, IN WHICH EMULSION THE ORGANIC HALIDE IS MIXED WITH A STOICHIOMETRIC EXCESS OF WATER AND IS SUBSTANTIALLY COMPLETELY HYDROLYZED, PUMPING SAID EMULSIFIED MIXTURE OF ORGANIC HALIDE AND WATER DOWN SAID WELL AS THE ORGANIC HALIDE STARTS TO HYDROLYZE, INJECTING SAID EMULSIFIED MIXTURE OF ORGANIC HALIDE AND WATER INTO SAID SUBTERRANEAN FORMATION IN A RADIALLY EXTENSIVE ZONE AROUND THE WELL AT A RATE SUCH THAT THE MAJOR PORTION OF THE REACTION PRODUCT HYDROGEN HALIDE FORMED BY SAID HYDROLYZING ORGANIC HALIDE IS FORMED WITHIN SAID FORMATION AND A GREATER PORTION OF THE HYDROGEN HALIDE IS FORMED IN THE VICINITY OF THE WELL WITH A LESSER PORTION OF SAID HYDROGEN HALIDE BEING FORMED AT RADIALLY EXTENSIVE DISTANCES FROM SAID WELL, AND MAINTAINING SAID INJECTED MIXTURE IN SAID FORMATION FOR A TIME SUFFICIENT FOR THE REACTION PRODUCT HYDROGEN HALIDE TO REACT WITH AND DISSOLVE A PORTION OF SAID FORMATION TO INCREASE THE PERMEABILITY THEREOF.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |