FIELD: mining industry, means catching and holding core. SUBSTANCE: given core catcher includes thin-walled cylinder which one end has conical shape and through grooves forming tabs of gripper of rectangular form. Internal surfaces of tabs have horizontal knurls which form sawtooth shape in crosssection. Relation of width of tab to width of groove amounts to 0.6-0.8. Relation of width of tab to length of tab is 0.2- 0.4. EFFECT: raised reliability of core catching. 2 dwg
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