INSERT IMPACT DEVICE FOR CORE SAMPLING Russian patent published in 2017 - IPC E21B25/02 

FIELD: mining engineering.

SUBSTANCE: core sampling device comprises a rotating tubular body, a core bit fixed for rotation with the body and axially movable relative to the rotating tubular body, a retrievable core assembly, configured to be fixed to the rotating tubular body or relative thereof. The retrievable core sampling assembly comprises a stem of the core grabber for the core, made separate from the tubular body to avoid rotation with it and working in conjunction with the core bit for holding the core and a percussion device to provide impact on the core bit according to the longitudinal impact transmission system, disconnected or substantially disconnected from core grabber stem. The pipe body is made with bit rotation function. The impact device is designed with the capability to apply impacts on the bit to retrieve and deliver core material from the formation to the core grabber stem in core stem insulation mode to guard from rotational and impact forces.

EFFECT: accelerated sampling of high-quality core samples.

10 cl, 4 dwg