作者: Antonio Castrero , Timothy Stump , William Michael Mulligan
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摘要: A fluid-actuated directional percussive impact tool includes a back head for connection to pressurized fluid source and casing housing drill bit longitudinally movable with respect thereto. The has central axis extending therethrough. sonde is coupled between the disposed therein. bent sub integrally formed connects such that of intersects at non-zero angle.