Seismic energy source
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United States of America Patent
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-
Sep 19, 1989
Grant Date -
N/A
app pub date -
Jan 27, 1987
filing date -
Jan 27, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An assembly is provided for generating seismic signals in the earth utilizing one or more shells. A tubular barrel made of frangible material, such as plastic, has a shell positioned within it, the shell having a head with an electrically actuated primer button. A continuity block is positioned within the barrel providing electrical continuity with the shell and the primer button. Conductors are connected to the continuity block and extending exteriorly of the barrel, the shell being fired by connecting the conductors to a voltage source. The barrel may be elongatd to house a plurality of spaced apart shells, the first shell being electrically fired and the other shells being fired by percussion. Each percussion shell is engaged by a plunger which is actuated by the slug fired from the adjacent shell so that upon firing of the electric shell, the slug thereof fires the first percussion shell and each percussion shell thereafter is fired in sequence. Alternatively, the first shell may be a percussion shell fired by a rod extending to the earth's surface.
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