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
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。
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。
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。
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。
OPTIMIZATION OF LATERAL FORCE BALANCE OF PDC BITS BASED ON ANT COLONY PARTICLE SWARM HYBRID ALGORITHM
基于蚁群粒子群混合算法的PDC钻头侧向力平衡优化
bit's directional cutting ability
钻头的定向切削能力
medium-radius lateral drilling
中曲率半径侧向钻井
drill(ing) head
钻头; 主轴头; 钻床床头箱; 钻削动力头;钻头头部, 钎头
He heaved another sigh, screwed his head into the pillow.
他又叹口气，头向枕头里钻钻。
Parameter Measurement and Transmission of the Drill Bit for Horizontal Directional Drilling
水平定向钻进钻头信息的测量与传输
Application of Bit Water Way in HDD
水平定向钻进扩孔钻头水口应用分析
Research on Dynamics of Driver & Hydraulic Driving System of Z6500 HDD Power Pack
Z6500水平定向钻机动力头及其液压驱动系统动力学研究
The bird cocked its head to/on one side.
鸟把头斜向[到]一侧.
engine mud sill
钻机动力机下纵向底梁
Superior( Cephalic, Cranial, Above) Toward the head or upper part of the body.
上(头侧，颅侧，上方)指向头或身体上部的方位。
unit-type drill head
组合钻床钻头, 标准钻头
Design and Improvement of Back Reamer in Directional Drilling Non-excavation Pipe Laying Construction
导向钻进非开挖铺管施工扩回钻头的设计改进
APPLICATION OF SIDETRACKING USING CASING SECTION MILL IN BURIED HILL RESERVOIR
套管段铣定向侧钻技术在潜山油藏的应用
Research on the Breakage Mechanism of Micro-drills and Drilling Forces Online Monitoring
微钻头折断机理及钻削力在线监测的研究
Acoustic Transmission and Measurement Method for Near-bit Dynamic Force Signal of Bottom Drill String
底部钻柱近钻头动态力测量及声传输方法
Longitudinal-cracking Failure Analysis of Box
φ139.7mm钻杆内螺纹接头纵向开裂失效分析
Effect of Roughness of Bore Wall on Side Friction Resistance of Bored Pile
孔壁粗糙度对钻孔灌注桩侧摩阻力的影响