DEVICE FOR DRILLING DEEP PERFORATION CHANNELS IN CASED WELL Russian patent published in 2005 - IPC

FIELD: oil and gas industry.

SUBSTANCE: device has body, provided with anchor, lowered on pipes to given depth, having guide and ring-shaped compaction of hydro-drive, and also made with possible displacement inside pipes and body by displacement means, hydraulic engine, passing through compaction, hollow of which is connected to destroying tool hollow, consisting of flexible shaft, provided with destroying head. Device also has tool for destroying casing column and tool for destroying rock, while hydro-drive consists of hollow leading and following shafts, made with possible rotation and longitudinal movement of the latter inside leading shaft until mounting in socket of leading shaft, forming non-pressurized couple cylinder-piston, while torque from leading shaft to following shaft is passed via ratchet gear, body has hydraulic channel, connecting guide hollow to ring-shaped well space, while on the side, opposite to output aperture of guide hydraulic deflector of piston-cylinder type is mounted on it, and in upper portion of body a cylindrical recess is present, made with possible hermetic mounting of leading shaft with rotation, while outside the body an anchor is mounted, being in threaded connection to sub connected to body, and engine is made with possible hermetic mounting in ring-shaped compaction, mounted above recess in body at a distance, lesser than total length of engine and leading shaft, while on the inner surface of body a stop is mounted made with possible interaction with shelves on outer surface of engine body. For making perforation channels in abrasive rocks rock-destroying tool is used, consisting of flexible shaft and chisel. As movement means flexible pipes are used, hollow of which connects to engine hollow.

EFFECT: higher reliability, higher efficiency.

7 cl, 5 dwg