US4046194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolinking method for improving permeability of hydrocarbon formation
Assignee: Mobil Oil AS
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Filing: 1976-05-03
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Granted: 1977-09-06
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Expires: 1996-05-03
Abstract
Abstract A method of improving the permeability of a hydrocarbon bearing formation such as a coal seam by electrolinking a first well and a second well which have been drilled into the formation. Both wells are completed with similar strings of casing. The portion of the casing string which passes into or through the formation is comprised of alternating sections of electrically conductive and nonconductive material. An electrode is lowered into each well into contact with one of the electrically conductive sections. Current is then flowed between the electrodes in the wells until a permeable path through the formation is established. Then one or both electrodes are moved into contact with different conductive sections within the respective wells and the procedure is repeated.
Inventors
- 👤 Wayne B. Cloud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:08
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/2401; E21B43/17
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
141 words
A method of improving the permeability of a hydrocarbon bearing formation such as a coal seam or the like, said method comprising: drilling a first well into said formation; drilling a second well into said formation spaced from said first well; completing each of said wells with a string of casing having a portion passing into said formation comprised of alternating sections of conduit made from electrically conductive material and electrically nonconductive material, said strings of casing each having more than one electrically conductive section lying within said formation; lowering an electrode in said first well and into contact with one of said electrically conductive sections of casing within said formation; lowering an electrode in said second well and into contact with one of said electrically conductive sections of casing within said second well; and flowing electric current between said electrodes.
Claim 2
Independent Claim
141 words
A method of improving the permeability of a hydrocarbon bearing formation such as a coal seam or the like, said method comprising: drilling a first well into said formation; drilling a second well into said formation spaced from said first well; completing each of said wells with a string of casing having a portion passing into said formation comprised of alternating sections of conduit made from electrically conductive material and electrically nonconductive material, said strings of casing each having more than one electrically conductive section lying within said formation; lowering an electrode in said first well and into contact with one of said electrically conductive sections of casing within said formation; lowering an electrode in said second well and into contact with one of said electrically conductive sections of casing within said second well; and flowing electric current between said electrodes.
Claim 3
Dependent Claim
38 words
The method of claim 1 including: ceasing flow of electric current between said electrodes; moving one of said electrodes into contact with a different electrically conductive section in its respective well; and flowing electric current between said electrodes.
Claim 4
Dependent Claim
39 words
The method of claim 2 including: ceasing flow of electric current between said electrodes; moving the other of said electrodes into contact with a different electrically conductive section in its respective well; and flowing electric current between said electrodes.
Claim 5
Dependent Claim
33 words
The method of claim 1 wherein said electrically nonconductive material is comprised of plastic pipe and said electrically conductive material is comprised of steel collars which couple lengths of said plastic pipe together.
Claim 6
Dependent Claim
24 words
The method of claim 1 wherein said first well and said second well are completed substantially perpendicular to the bedding plane of said formation.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein said first well and said second well are completely substantially parallel to the bedding plane of said formation.
Claim 8
Independent Claim
133 words
A method of improving the permeability of a hydrocarbon bearing formation such as a coal seam or the like, said method comprising: completing a first and a second well within said formation with similar strings of casing, each string of casing having a portion thereof which passes into said formation comprised of alternating sections of conduit made from electrically conductive material and electrically nonconductive material, said strings of casing each having more than one electrically conductive section lying within said formation; lowering an electrode in said first well and into contact with one of said electrically conductive sections of casing within said formation; lowering an electrode in said second well and into contact with one of said electrically conductive sections of casing within said second well; and flowing electric current between said electrodes.
Claim 9
Independent Claim
133 words
A method of improving the permeability of a hydrocarbon bearing formation such as a coal seam or the like, said method comprising: completing a first and a second well within said formation with similar strings of casing, each string of casing having a portion thereof which passes into said formation comprised of alternating sections of conduit made from electrically conductive material and electrically nonconductive material, said strings of casing each having more than one electrically conductive section lying within said formation; lowering an electrode in said first well and into contact with one of said electrically conductive sections of casing within said formation; lowering an electrode in said second well and into contact with one of said electrically conductive sections of casing within said second well; and flowing electric current between said electrodes.
Claim 10
Dependent Claim
38 words
The method of claim 7 including: ceasing flow of electric current between said electrodes; moving one of said electrodes into contact with a different electrically conductive section in its respective well; and flowing electric current between said electrodes.
Claim 11
Dependent Claim
39 words
The method of claim 8 including: ceasing flow of electric current between said electrodes; moving the other of said electrodes into contact with a different electrically conductive section in its respective well; and flowing electric current between said electrodes.
Claim 12
Dependent Claim
33 words
The method of claim 7 wherein said electrically nonconductive material is comprised of plastic pipe and said electrically conductive material is comprised of steel collars which couple lengths of said plastic pipe together.
Claim 13
Dependent Claim
24 words
The method of claim 7 wherein said first well and said second well are completed substantially perpendicular to the bedding plane of said formation.
Claim 14
Dependent Claim
24 words
The method of claim 7 wherein said first well and said second well are completed substantially parallel to the bedding plane of said formation.
References Cited (Backward Citations)
US2795279A
Cited
US3106244A
Cited
US3169577A
Cited
US3236304A
Cited
US3718186A
Cited
US3620300A
Cited
US3696866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |