Rotary Drilling 60mm 70mm 76mm DTH Drill Rod

DTH Drill Rod Introduction

Drill pipe is a portion of the overall drill string. The drill string consists of both drill pipe and the bottom hole assembly (BHA), which is the tubular portion closest to the bit. The BHA will be made of thicker walled heavy weight drill pipe (HWDP) and drill collars, which have a larger outside diameter and provide weight to the drill bit and stiffness to the drilling assembly. Other BHA components can include a mud motor, measurement while drilling (MWD) apparatus, stabilizers, and various specialty downhole tools. The drill stem includes the entire drill string, plus the kelly that imparts rotation and torque to the drill pipe at the top.

Various Types of DTH Drill Rod :

6321859 Blasthole drill with bi-material roller for supporting a load 2001-11-27 Boyd 152/5
6298926 Blast hole drill with improved deck wrench 2001-10-09 Dalkert et al. 175/209
5653297 Blasthole drill with improved automatic breakout wrench 1997-08-05 Whisenhunt 175/162
5622232 Blasthole drill with drill-through pipe rack 1997-04-22 Whisenhunt 175/52
4605078 Carriage feed system 1986-08-12 Bukovitz et al. 175/113
4371041 Multi-purpose mobile drill rig 1983-02-01 Becker et al. 173/147
4049064 Multi function drill drive system 1977-09-20 Chubb et al. 173/147
3867989 PULLDOWN MECHANISM FOR ROTARY DRILL APPARATUS 1975-02-25 Hisey et al. 173/147

DTH Drill Rod Pictures

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