دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a drilling bit with two or morecones mounted on bearings. The cutters consist of steel teeth or tungsten carbide inserts. Also called a rock bit.

a bit with multiple rotating cones that bring cutters into contact with the formation as the string is rotated.

n: in roller chain, the outside diameter of the roller, about 5/8 of the pitch.

n: A kind of oven that be used to maintenance the sample of drilling fluid at dynamic situation.

n: on a kelly bushing, a shaft that fits inside each roller on the txlshing to affix the rollers to it. See kelly bushing, roller assembly.

n: A kind of composition assemble of bearing of cone bit ,which contain a pair of roller,ball and plain bearing.

n: A kind of composition assemble of bearing of cone bit,its diameter larger than 228.6mm.

n: A kind of cross country vehicle,which be used to transport in marsh,desert and tundra.

n: A kind of bearing that include rolling element,for example,ball bearing,pin bearing,etc.

n: It is consist of slide block, centibar,roller and body,which is benefit to stabilize the bit and prevent well deviation.

n: an anticline formed when the dip of a growth fault approaches the horizontal at depth and deposition is faster on the downthrown side, which tends to roll over" or curl downward.