Fluid is conveied to bit nozzel through drill string from pump is a transient state flowing with pressure wave, which makes the fluid jetted out from nozzel has certain pulsation.
从钻井泵经过钻柱内部输送到钻头流体是一种瞬态流动,存在着压行波,使从普通射出流体有一定程脉动。
Fluid is conveied to bit nozzel through drill string from pump is a transient state flowing with pressure wave, which makes the fluid jetted out from nozzel has certain pulsation.
从钻井泵经过钻柱内部输送到钻头流体是一种瞬态流动,存在着压行波,使从普通射出流体有一定程脉动。
Abstract: Some related parameters of nozzel installation positi on and the influencing regulation of the slotting numbers of untwisted tube on the yarn strength were researched.
摘 要: 研究了气纺纱安装位置有关参数及解捻管槽数对成纱影响规律。
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