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1. (WO2018203721) DIRECTIONAL DRILLING APPARATUS USING WATER HAMMER UNIT

Pub. No.:    WO/2018/203721    International Application No.:    PCT/KR2018/005214
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Sat May 05 01:59:59 CEST 2018
IPC: E21D 9/10
E21D 9/02
E02F 5/18
Applicants: IN, Suk Shin
인석신
Inventors: IN, Suk Shin
인석신
Title: DIRECTIONAL DRILLING APPARATUS USING WATER HAMMER UNIT
Abstract:
A directional drilling apparatus using a water hammer unit of the present invention comprises: a hammer unit including a hammer body which is provided with a bit unit for performing a drilling operation at an end thereof so as to be movable up and down, a piston which is slidably installed in the hammer body and has a working fluid discharge portion in the longitudinal direction thereof, and a drive unit which is installed between the hammer body and the piston so as to support the upper portion of the piston and to lift and lower the piston by water supplied through a rod connected to the hammer body, wherein the hammer unit has a rotary shaft coupled with the bit by a first engaging portion so as to transmit a rotational force to the bit through a piston installed in the hammer body in a state of being lifted or lowered; and a mud motor unit which is coupled with the hammer body to drive the rotary shaft.