Rotary drilling versatility

摘要

Launched in October last year, Boart Longyear's XRH range consists of 12 base models with various motor configurations designed for all construction rotary drilling applications, including jet grouting and reverse circulation. Boart Longyear's new electronic valve control technology also features on the range. The patent-pending system allows the XRH rotary heads to run two or three motors and switch from series to parallel operation, eliminating low-torque start-ups after making and breaking joints and manual shifting of gears. The rotary heads deliver a maximum rotation speed of 188 rpm. "We've designed these construction heads to be easily integrated into a wide range of existing Boart Longyear and competitive rigs, making this new technology accessible to virtually any contractor," construction equipment product manager Ron Hankins explained.