Patent US4010799A successfully refreshed from Google Patents.
US4010799A
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Method for reducing power loss associated with electrical heating of a subterranean formation
Assignee: Petro Canada Exploration Inc
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Filing: 1975-09-15
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Granted: 1977-03-08
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Expires: 1995-09-15
Abstract
Abstract Method for reducing the loss of power accompanying the transmission of electrical energy down a wellbore to heat a subterranean formation via electrical conduction between a plurality of wells completed therein, characterized by providing a low frequency alternating current to the conductors in the wellbore. Also disclosed are specific embodiments of the invention.
Inventors
- 👤 Loyd R. Kern
- 👤 Thomas K. Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:06
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/2401
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
Method of reducing power losses associated with transmission of electrical energy down a wellbore to heat a subterranean formation via electrical conduction between a plurality of wells completed therein, which comprises, passing an alternating current having a frequency of from about 0.10 to about 5.0 cycles per second through the conductors in said wellbore.
Claim 2
Dependent Claim
54 words
Method of reducing power losses associated with transmission of electrical energy down a wellbore to heat a subterranean formation via electrical conduction between a plurality of wells completed therein, which comprises, passing an alternating current having a frequency of from about 0.10 to about 5.0 cycles per second through the conductors in said wellbore.
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) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |