The automatic vertical drilling system (VDS) adopts downhole closed-loop control, through ground monitoring, a large closed-loop control on the ground and downhole is formed to keep the wellbore in a ...

The DeWalt DCD701F2 Xtreme 12V Max Brushless Cordless 3/8 in. Drill/Driver Kit combines power, comfort, and convenience in a way that none of the other tested drills do. In our tests, it bored 30 ...