US3693719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for paraffin removal from hydrocarbon-bearing formations
Assignee: Texaco Inc
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Filing: 1970-11-02
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Granted: 1972-09-26
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Expires: 1990-11-02
Abstract
Abstract Solid paraffin-like hydrocarbon materials derived from petroliferous fluids which have been deposited in hydrocarbonbearing formations are removed by introducing into the formation in the vicinity of the well bore a hydrolyzable, aprotic, halogenated organic material, such as allyl chloride, whereby the said paraffin-like hydrocarbon material is removed, and the permeability and porosity of the formation and production of hydrocarbons therefrom is increased, the well is returned to production and the hydrolyzable, aprotic, halogenated organic compound containing the dissolved or peptized paraffin is removed from the well and conducted to a vessel containing water or a base dissolved in water.
Inventors
- 👤 Thomas E Sample Jr
- 👤 Jack F Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:15
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
28 words
The process of claim 1 wherein the said aprotic halogenated compound is selected from the group consisting of allylic halides, propargylic halides, alpha-haloalkyl aryl compounds, and mixtures thereof.
Claim 2
Dependent Claim
27 words
The process of claim 1, wherein the said aprotic halogenated compound selected from the group consisting of allyl chloride, 1-chloro-2-butene, propargyl chloride, benzyl chloride and benzylidene chloride.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the said aprotic halogenated compound is allyl chloride.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the said aprotic halogenated compound is allyl chloride and the said hydroxylic material is water.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein the said aprotic halogenated compound is allyl chloride and the said hydroxylic material is water admixed with base.
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |