Device for generating seismic impulses inside a drilling through the fall of a weight onto an anchored target element
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United States of America Patent
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Sep 27, 1988
Grant Date -
N/A
app pub date -
Sep 21, 1984
filing date -
Sep 22, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Device for generating seismic impulses for, for example, seismic prospecting, inside a hole or drilling well by impact of a weight or mass falling onto a target element coupled with a wall of the hole or drilling well. The target element is bound up with a variable volume anchorage element capable of being expanded so that it strikes against the wall of the hole or drilling well and is surmounted by a guiding column along which slides a hammer or weight forming the mass. A cable lifting system and magnetic devices enable the hammer or weight to be hoisted to a particular height above the target element.
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