US4320014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acidification of subterranean formations employing halogenated hydrocarbons
Assignee: Dow Chemical Co
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Filing: 1980-10-10
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Granted: 1982-03-16
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Expires: 2000-10-10
Abstract
Abstract The in situ production of hydrochloric acid in a subterranean formation to increase the flow of gas or oil therefrom by decomposing a polyhalohydrocarbon in the formation is accomplished at lower temperature by injecting the polyhalohydrocarbon together with isopropyl alcohol or a Lewis acid, e.g. FeCl3, or a mixture of the alcohol and Lewis acid.
Inventors
- 👤 Thomas A. Vivian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:34
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
53 words
In the in situ acidizing of a subterranean formation by decomposing a halohydrocarbon, the improvement which comprises introducing into said formation a mixture of carbon tetrachloride, water, isopropyl alcohol and ferric chloride, wherein the weight ratio of carbon tetrachloride to water to isopropyl alcohol to ferric chloride is from 2/5/1/0.04 to about 2/14,000/1/0.6.
Claim 2
Dependent Claim
53 words
In the in situ acidizing of a subterranean formation by decomposing a halohydrocarbon, the improvement which comprises introducing into said formation a mixture of carbon tetrachloride, water, isopropyl alcohol and ferric chloride, wherein the weight ratio of carbon tetrachloride to water to isopropyl alcohol to ferric chloride is from 2/5/1/0.04 to about 2/14,000/1/0.6.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-15 | 1985-09-14 | 1986-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-15 | 1989-09-14 | 1990-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-15 | 1993-09-14 | 1994-03-16 | $7700.00 | Window Closed / Lapsed |