1) bit heading
钻头指向
2) guide bit
导向钻头
1.
Rearch of dynamics effect simulation on Trenchless guide bit;
非开挖导向钻头力学效应模拟仿真研究
3) directional bit
定向钻头
4) bit side force
钻头侧向力
1.
The bit side force of FG type anti-deviation device is almost never affected by drilling parameters, and the direction of bit side force continuously vary while drill string is rotating.
FG型防斜工具的显著特点是其防斜效果受钻压、转速等钻井参数影响较小,钻头侧向力大小基本不随钻压改变,在旋转过程中钻头侧向力方向可以不断变化。
2.
This paper makes a calculation of bit side force to the flexible pendulum stem and pendulum stem on the basis of vertial and horizontal bending theory, which, theoretically, shows that flexible pendulum stem has a better inclination correction effect than pendulum stem.
在控制井斜技术中,钻头侧向力是衡量控制井斜效果的关键参数。
3.
According to the model of calculating bit side force with the bending method,the applied force analysis software of BHA was developed with VB6.
根据纵横弯曲法计算钻头侧向力的模型,应用VB6。
5) bit pilot
钻头导向器
6) nose pointing
机头指向
1.
According to the purpose of post-stall maneuver-changing nose pointing,and combining maneuverability and agility,the changing law of primary parameter of post-stall maneuver process was analyzed.
利用四元数法建立了带推力矢量的飞机大迎角全量运动方程,依据过失速机动的主要目的"改变机头指向",结合战斗机的机动性和敏捷性,分析了在过失速机动过程中主要运动参数的变化规律,提出了分析评估飞机过失速机动性能优劣的4个指标,即最大配平迎角、从平飞状态拉起到机动迎角和从机动迎角恢复至初始平飞状态的时间、在机动迎角下绕速度矢量滚转并截获90°倾斜角的时间和过失速空战周期,并针对这4个指标开展了相应的全量仿真和量化评估研究,结果表明提出的指标可对过失速机动动作做出有效评估。
补充资料：大直径牙轮钻头
大直径牙轮钻头
大““钻头篡
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条