دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a drilling bit with tungsten carbide inserts on the cones that resemble plugs or buttons. See roller cone bit.

nn: The cone bit which is installed with obtuse tungsten carbide insert.

n: The heigh of tungsten carbide insert above cone surface in cone bit.

n: that part of the cone of a Toner cone bit out of which the teeth are milled or into which tungsten carbide inserts are placed and inside of which the bearings are housed.

n: The shell of cone bit.

n: a kind of tool with tungsten carbide insert filleted in the bottom surface ,used to break rocks under the impact force offered by hammer tool

n pi: the teeth or tungsten carbide inserts in the outermost row on the cones of a bit, so called because they cut the outside edge of the hole and determine the holes gauge or sire. Also called heel teeth.

n: outermost tooth of cone bit.the reason of this name is that they cut
wellbore outermost part and determine the diameter of wellbore.the
outermost tooth is usually shaped II pattern、I pattern、L pattern to prevent excessive wear of the bit diameter。

n: see roller cone bit.

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

n: see roller cone bit.

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.

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: a drilling bit made of two, three, or four cones, or cutters, that are mounted on extremely rugged bearings. The surface of each cone is made of rows of steel teeth or rows of tungsten carbide inserts. Also called rock bit.

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.