| 摘要 |
<p>Disclosed are a drilling rig and a drilling method using the same. The present invention comprises a polygonal out casing; a striking apparatus which is mounted in the out casing and strikes it in the longitudinal direction so that the out casing is inserted into the ground; a drill bit which is inserted in the out casing after passing therethrough, a connecting rod which is connected with the drill bit and transmits the torque delivered from outside thereto. Therefore, the present invention enables insertion of various polygonal out casings into the ground.</p> |
