Releasing device in core barrel grapplers
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 14, 1984
Grant Date -
N/A
app pub date -
Oct 5, 1981
filing date -
Oct 8, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for disengaging a grappling device from a core barrel, which are lowered in an engaged or connected state into a hollow drill rod, is actuated by a recess made in the drill rod bore, when the barrel approaches or assumes a working position in the drill rod, and is thereby displaced by a spring for disengaging the mechanism connecting the grappling device and barrel.
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