دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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.

by weight of the blend.

n: I. the crown block or top of a derrick or mast. 2. the top of a piston. 3. a high spot formed on a tool joint shoulder as the result of wobble.

n: The top of the derrick containing the blockline sheaves.

high point.

n: The difference of bit load measured by weight indicator in drill floor and bit load measured by MWD.

n: a flowmeter that operates on the principle of the positive displacement of fluid by incorporating the wobbling motion of a piston or a disk. See positive displacement meter.

n: (WOB) the amount of downward force placed on the bit by the weight of the drill collars.

n: The weight on the drill bit when drilling.

abbr: weight on bit.

weight on bit.

n: movement between the mating surfaces of box and pin in a tool joint. v: to move in a rocking motion.

lock ring that anchors the gas lift valve in the side pocket mandrel.