Part of the Drill String Components

Drilling tools drill pipe is connected to power transmission lever. Usually part of the drill string components are: drill, drill collars, drill Pipe,drilling stabilizers, special fittings and kelly. The basic role of the drill string is: (1) from under the drill bit; (2) applying WOB; (3) the transmission of power; and (4) conveying the drilling fluid; (5) special job: squeeze cement, processed downhole accidents.