UNIT FOR SURVEY AND WORKING OF UNDERWATER FORMATIONS Russian patent published in 1994 - IPC

FIELD: mining industry. SUBSTANCE: unit comprises sampler installed coaxially on core barrel and connected therewith by flexible links. Sampler has grabbing member and flexible hanger for connection to hoist of service vessel. Upper and lower ends of core barrel have chambers filled with coolant. Grab is also made as a coolant-filled chamber. The working surface of grab is arranged opposite to flexible hanger and has a serrated rim. Unit also incorporates impact ram connected with core barrel by links whose ends are articulated to impact ram and core barrel. Each link is made from two levers with their ends articulated to each other. EFFECT: improved design. 3 cl, 3 dwg