دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the portion of the drilling assembly below the drill pipe. It can be very simple - composed of only the bit and drill collars - or it can be very complex and made up of several drilling tools.

n: a percussion tool run on a fishing string to jar downward or upward on a stuck fish to knock it free. The bumper sub body moves up and down on a mandrel.

n: A drilling tool consisting of a short stroke slip joint that allows a more constant WOB when drilling from a floating rig.

n: The drill tool for cable drilling.

n: The drilling tool for cable drilling.

n: a piece of drilling equipment that joins the hook and travelling block into one unit designed to support the swivel and drill stem during drilling and to raise and lower drilling tools in and out of the hole.

n: A set of technologic treating. Including composition of drilling tool, drilling parameter and cutting method.

n: Special tool used in directional drilling which can build angle,hold angle drop angle, survey the deviation and direction.

n: the time range and the footage range which the drilling tools can stand

n: a drilling tool made up in the drill string directly above the bit. It causes the bit to turn while the drill string remains fixed. It is used most often as a deflection tool in directional drilling, where it is made up between the bit and a bent sub (or, sometimes, the housing of the motor itself is bent). Two principal types of down-hole motor are the positive-displacement motor and the downhole turbine motor. Also called mud motor.

n: A special tool mounted in the BHA (q.v.) to drive the bit without rotating the drill string from surface (see positive displacement motor).

v: under certain drill pressure,drilling without langing the drilling tools until there is no pressure