| Title | Proposal for New Type of Downhole Percussion Drills for Hard Rock Drilling |
|---|---|
| Authors | Karasawa, Hirokazu; Ohno, Tetsuji; Ota, Akinori; Kaneko, Tsutomu; Koizumi, Masahiro; Yamada, Naoto; Miyamoto, Tetsuomi |
| Year | 2002 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Drilling and Completion; Percussion Drill; Mud Hammer; Downhole Motor; Hard Rock; Drilling |
| Abstract |