Usage:horizontal directional drilling ①Threaded with series processes to precise tolerances. ②Features one-piece forged rod that\'s far more durable than welded two-piece models. ③Match up perfectly, and the internal and external shoulders simultaneously make direct ...
PDC no coring drill bit Application: Used in geological exploration drilling holes, gas drainage hole, grouting hole drilling, suitable for easy paste viscosity of soft rock. Features: 1. Big hole design, chip space is big, high drilling efficiency in soft rock. 2. Cutting free ...