دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the force which is toward to the hole wall and generates when the drilling pipe is rotating in the inclined well or the unbalanced drill collar is rotating in the well

n: the tools which can make the bit deviate the drilled hole axis when they rotate in the well ,such as unbalanced drill collar,three-cone bit that lacks a cone

n: the bottom drill assembly with unbalanced drill collar

n: The general collar that have a row of blind hole at one side face,which can decrease the well deviation.