Best way to drill through rock

You will need a hammer drill to work with a rock. These impressive tools can come in one hand and two hand formats and are designed to use a “hammering action” to drill through the most difficult of materi. [pdf]

Drilling rig floor valves

DSSV, FOSV & IBOP Valves are used to control fluid through the ID of wellbore tubulars. These valves have been the choice of well drilling and workover companies for more than 30 years. [pdf]