Releasing device in core barrel grapplers

Details Releasing device in core barrel grapplers Releasing device in core barrel grapplers

E - Fixed Constructions

21

B

294/12, 255/3

E21B 25/00 (2006.01) E21B 25/02 (2006.01)

Patent

CA 1182441

ABSTRACT A device for disengaging a grappling means 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 means connecting the grappling means and barrel.

387561

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