Wells – Processes – With indicating – testing – measuring or locating
Patent
1979-07-09
1981-08-04
Novosad, Stephen J.
Wells
Processes
With indicating, testing, measuring or locating
166 52, 166 64, 166 65R, E21B 43243, E21B 4700
Patent
active
042817137
ABSTRACT:
An underground combustion operation in which combustible material, in a selected geologic formation at a selected depth, is burned by forcing air under pressure down a first well into the formation, and collecting products of combustion at a second well, a selected distance away from the first well. The overburden above the formation is supported, in part, by the combustible material, which might be viscous oil, tar, etc. This material is ignited at the first well and a flame front is formed which burns in the form of a circular front, which moves radially outwardly as a function of time and the rate of air supply. A plurality of electronic tilt meters are positioned at or near the surface of the earth, in at least one linear array directed along the radius from the first well to the second well. Combustion air is provided and the outputs of the tilt meters are amplified and recorded as a function of time. As the flame front progresses, the overburden behind the front will slump, which will be selected by a corresponding slump and tilting of the earth surface, which will be reflected in the corresponding readings of the tilt meters.
REFERENCES:
patent: 2770305 (1956-11-01), Pirson
patent: 2803305 (1957-08-01), Behning et al.
patent: 3072184 (1963-01-01), Parker
patent: 3483730 (1969-12-01), Gilchrist et al.
patent: 4082145 (1978-04-01), Elkington
patent: 4143714 (1979-03-01), Agnew
Silverman Daniel
Wood Milton D.
M. D. Wood, Inc.
Novosad Stephen J.
Silverman Daniel
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