Down hole drilling tools classification

Down hole drilling tools classification: drill is a major and essential part of the drill string, its main role is to transfer torque delivery during drilling mud and constantly connected to the drill string in order to achieve longer continue to raise deep eyes purpose. Drill collars located in the drill bit and drill hole assembly or worsen between the drill pipe, drill main role is to provide control WOB and inclination,drill collars are generally made by high alloy steel forging.