Proposal for New Type of Downhole Percussion Drills for Hard Rock Drilling

Karasawa, Hirokazu; Ohno, Tetsuji; Ota, Akinori; Kaneko, Tsutomu; Koizumi, Masahiro; Yamada, Naoto; Miyamoto, Tetsuomi

Key words: Drilling and Completion; Percussion Drill; Mud Hammer; Downhole Motor; Hard Rock; Drilling
Conference: Geothermal Resources Council Transactions
Year: 2002
Session: Drilling and Completion; Percussion Drill; Mud Hammer; Downh
Language: English

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