Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent
1982-06-04
1984-07-17
Goldberg, Gerald
Mining or in situ disintegration of hard material
Automatic control; signaling or indicating
Of hard material disintegrating machine
299 2, 166251, E21C 4110, E21B 4710
Patent
active
044602189
ABSTRACT:
Method and system for characterizing a vertical modified in situ oil shale retort prior to ignition of the retort. The retort is formed by mining a void at the bottom of a proposed retort in an oil shale deposit. The deposit is then sequentially blasted into the void to form a plurality of layers of rubble. A plurality of units each including a tracer gas cannister are installed at the upper level of each rubble layer prior to blasting to form the next layer. Each of the units includes a receiver that is responsive to a coded electromagnetic (EM) signal to release gas from the associated cannister into the rubble. Coded EM signals are transmitted to the receivers to selectively release gas from the cannisters. The released gas flows through the retort to an outlet line connected to the floor of the retort. The time of arrival of the gas at a detector unit in the outlet line relative to the time of release of gas from the cannisters is monitored. This information enables the retort to be characterized prior to ignition.
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Loucks, Robert A., Occidental Vertical Modified In Situ Process for the Recovery of Oil from Oil Shale: Phase 1, U.S. Dept. of Energy, Nov. 1977, pp. 8-10.
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Quarterly Progress Report Oct. 1980-Mar. 1981, Laramie Energy Research Center, Feb. 1982, pp. 25-26.
Moore Dennis F.
Turner Thomas F.
Clouse, Jr. Clifton E.
Gaither Roger S.
Goldberg Gerald
Harding E. G.
The United States of America as represented by the United States
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