公开(公告)号：US10041861B2

公开(公告)日：2018-08-07

申请号：US15108518

申请日：2014-05-01

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Jung-Woo Cho ,  Dae-Young Shin ,  Jae-Wook Lee ,  Joo-Young Oh ,  Jin-Young Park ,  Ki-Beom Kwon ,  Chang-Heon Song

IPC: E21B10/36 ,  E21B10/42 ,  E21B10/43 ,  G01F22/00 ,  G01L5/00 ,  G01M99/00 ,  G01N3/303

Abstract: An apparatus and a method for testing drilling efficiency of a drill bit, according to the present invention, calculate an amount of fractured rock according to a button arrangement, thereby obtaining an optimum button arrangement.