Wells – Processes – Electric current or electrical wave energy through earth for...
Patent
1992-06-17
1993-08-17
Britts, Ramon S.
Wells
Processes
Electric current or electrical wave energy through earth for...
166 60, 166 651, 166272, E21B 4324, E21B 4330
Patent
active
052360393
ABSTRACT:
An in-situ method of extracting oil from a hydrocarbon bearing layer such as oil-shale or tar sands lying beneath a surface layer comprises applying a radiofrequency excitation signal to the hydrocarbon bearing layer through a system of electrodes. The electrodes are inserted into a matrix of holes drilled through the surface layer and into the hydrocarbon bearing layer. A coaxial line extending through the surface layer is connected to the electrodes extending into the hydrocarbon bearing layer. The electrodes have a length that is an integral number of quarter wavelengths of the radiofrequency energy. A matching network connected between the coaxial cable and a respective one of the electrodes maximizes the power flow into each electrode. The electrodes are excited uniformly in rows and as a "balanced-line" RF array where adjacent rows of electrodes are 180.degree. out of phase. This method does not produce substantial heating of the surface layer or the region surrounding the producing layer, and concentrates most of its power in the hydrocarbon bearing layer.
REFERENCES:
patent: Re30738 (1981-09-01), Bridges et al.
patent: 33259 (1990-07-01), Crooks et al.
patent: 4140179 (1979-02-01), Kasevich et al.
patent: 4140180 (1979-02-01), Bridges et al.
patent: 4144935 (1979-03-01), Bridges et al.
patent: 4470459 (1984-09-01), Copland
patent: 4576231 (1986-03-01), Dowling et al.
patent: 4886118 (1989-12-01), Van Meurs et al.
In Situ reporting of Oil Shale Using RF Heating by J. R. Bowden, G. D. Gould, R. R. McKinsey, J. E. Bridges and G. C. Sresty, presented at Synfuels 5th Worldwide Symposium, Washington, D.C., 1985.
Petroleum Formation and Occurrence: A New Approach to Oil and Gas Exploration, B. P. Tissot and D. H. Welte, Springer-Verlag, 1978, p. 235.
Radio Engineers' Handbook by Frederick E. Terman, McGraw-Hill, 1943, p. 773.
Edelstein William A.
Hsu Chia-Fu
Mueller Otward M.
Vinegar Harold J.
Britts Ramon S.
General Electric Company
Snyder Marvin
Tsay Frank S.
Zale Lawrence P.
LandOfFree
Balanced-line RF electrode system for use in RF ground heating t does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Balanced-line RF electrode system for use in RF ground heating t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Balanced-line RF electrode system for use in RF ground heating t will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2237990