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Seismic measurement by controlled shock waves - uses flexible probe in bore hole in earth to which compressed gas is applied in rapid bursts
Seismic measurement by controlled shock waves - uses flexible probe in bore hole in earth to which compressed gas is applied in rapid bursts
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机译：通过受控的冲击波进行地震测量-在地球的钻孔中使用柔性探头，并向其中快速施加压缩气体
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摘要
Geo seisuc measurements are obtained by the application of controlled shock waves to the earth. The shock waves are initiated by a probe (1) which is placed in a bore hole (2). The probe is constructed to have resilient walls defining annular cylindrical cavities (4) and (5). The shock waves are formed by the rapid pressurization of the cavities (4) and (5) by compressed gas stored in reservoirs (12) connected in cascaded form. By this arrangement a series of consecutive impulses can be created causing multiple shock waves to be transmitted through the earth (3).
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