دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The automatic operation that lands the drill stem automatically through the device controlling bit pressure to make the bit pressure sustained during drilling.

n: the mechanical load that enforces on bit or the arithmetic product of bit pressure and rotary speed. Which is main factor to effect the drilling speed.

n: bit pressure on the drind shoe or mill shoe when mill the fishing or open window of sidetrack drilling.

n: also called modified bit pressure exponent, dc exponent. It express dc=dpm/pml.

n: when turbodrill drilling, the certain realationship of turbodrill s bottom power, bit pressure, speed and mechanic speed is existed under certain fluid volume. When adopt a range of technical parameters, the rapid lower of speed with the raise of bit pr

n: under any speed or tooth wear , the bit pressure gained under the condition of lowest drilling cost .

n: during deepen the hole, people records tri-relationship of the bit pressure, revolution or drilling speed.