دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The new set of journal bearing insert bit presented by America Hughes Company. It has the longer life and higher ROP than many kinds of former bits.

n: See cast-insert bit.

n: A kind of diamond bit. The diamond cutting teeth which are arranged in the pattern and founding tungsten carbide are cemented together.

n: the insert bit with 100-140r/m rotate speed and the steel tooth bit with 140-200r/m rotate speed

n: see tungsten carbide bit.

n: a type of roller cone bit in which the cutting structure consists of the specially designed tungsten carbide cutter set into the cones.

n: see insert bit.

n: The cone bit that be setted of special shape hard metal tooth.

n: a type of roller cone bit with inserts made of tungsten carbide. Also called tungsten carbide insert bit.

n: The cone bit that be fixed tungsten carbide alloy tooths on the bore of shell.

n: a very hard, and relatively small, cylinder made of tungsten carbide bonded with nickel or cobalt. One end of the insert is rounded or tapered;the other end is truncated (cut oft) and inserted into a bit cone. The round or tapered end contacts the formation and drills it. Several inserts make up the cutters on a tungsten carbide insert bit.