Mining or in situ disintegration of hard material – Processes – Breaking down by direct contact with fluid
Patent
1980-04-25
1982-05-11
Purser, Ernest R.
Mining or in situ disintegration of hard material
Processes
Breaking down by direct contact with fluid
166271, 299 18, E21C 4102
Patent
active
043289959
ABSTRACT:
Lignite is removed from a seam or stratum containing the same in an underground formation by forming within the seam or stratum with aid of a production fluid, which can contain a dispersant or surfactant, a suspension of the lignite in said fluid whereupon the fluid is removed to the surface and the lignite recovered therefrom. The fluid thus recovered is re-used. The production fluid can be heated and/or pulsated and is injected and passed through the formation under conditions to promote the formation of the desired lignite suspension.
REFERENCES:
patent: 2952450 (1960-09-01), Purre
patent: 3850477 (1974-11-01), Aldrich et al.
patent: 3990513 (1976-11-01), Perch
patent: 4032193 (1977-06-01), Drinkard et al.
patent: 4076078 (1978-02-01), Drinkard et al.
patent: 4080308 (1978-03-01), Lamont
patent: 4092045 (1978-05-01), Sullivan
Kaiser, Univ. of Texas at Austin, Bureau of Economic Geology Report No. 79-2 pages-1974.
Stephens, Lawrence Livermore Lab., Univ. of Calif. "In-Situ Coal Gasification" Aug. 6, 1975-12 pages.
Borovicka, Translation From Czech "Underground Gasification of Slovak Coal (Lignate)" 5/76 12 pages.
Coal Age "Will Chemicals Replace Crushing" Feb. 1978 pp. 176-179.
Phillips Petroleum Company
Purser Ernest R.
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