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This is the BHA[bottom hole assembly] log. 这是井下钻具组合的记录本。
Make up bottom hole assembly (BHA). 组合下部钻具。
Please pull out of hole and change bottom hole assembly! 请起钻,换下部钻具结构!
Computer simulation of drillstring axial vibration and online monitoring of bottom hole condition. 钻柱轴向振动仿真与井底状态监测方法探讨。
When the flange hole of coal blower casing and inlet box is countersunk, the problem of connecting hole back spot facing can be effectively solved. 它可以有效地解决在锪煤气鼓风机铸铁机壳和进气箱的开箱法兰把接孔时,连接孔背面的锪平问题。
According to this problem,this paper proposes a modified isochronal well test with bottom hole liquid loading. 针对这个问题,提出了一种存在井底积液时的修正等时试井资料解释方法。
Bottom hole pressure changes complicatedly in suction well of double porosity reservoir. 双重孔隙介质油藏油井抽汲生产将使井底压力变化十分复杂。
A kind of rotary steering stabilizer used in a common rotary bottom hole assembly to control well path was developed. 在普通旋转钻具的基础上,研制了一种旋转的近钻头稳定器,它可以将钻柱稳定在井眼截面的需要位置,以控制井眼轨道。
The basic assumptions, equations and boundary conditions for bottom hole assembly (BHA) analysis were discussed. 讨论了下部钻具组合分析的基本假设、基本方程和相应的边界条件。
To study the passive force characteristics of the bearingless slice motor,by 2D magnetic circuit analysis,the axial suspension force model and back torque model are built for non-PM motor. 为了研究无轴承薄片电机的被动悬浮特性,通过2D磁路分析的方法,建立了非永磁薄片电机的2D轴向悬浮力模型和回复力矩模型,并进行了有限元仿真验证。
The modified isochronal well test data with bottom hole liquid loading will have abnormity, causing a fail of processing with the original theory or much error. 摘要存在井底积液的修正等时试井资料会出现异常，使原有理论无法处理相应的测试资料或处理的结果误差较大。
The security on the Eastern side was still full of holes back then. Then what? 东方阵营的安全措施那时候真是千疮百孔。然后呢?
With the fractal geometry theory, this paper puts forward a new rock drillability testing method by selecting detritus from bottom hole as object. 利用分形几何理论，研究了钻井过程中岩石破碎机理及形成过程，提出了一种以井底返出的岩屑为对象的岩石可钻性测试方法。
The bottom hole flow physical model of a kind of PDC coring bits is established considering the effect of junk slot and teeth layout in this paper. 以一种现场常用的PDC取心钻头为原型,充分考虑排屑槽和切削齿对于井底流动的影响,建立了与实际相接近的PDC取心钻头井底流场的物理模型。
Toughened glass front door and high density net hole back door, can meet the request of equipment protection, ventilation dispersing air, observing machine operation status from outside. 钢化玻璃前门及高密度网孔后门，可同时解决设备保护、通风散热、外部观察机器运行状态三方面的使用要求；
With the progress of drilling technology, bottom hole assembly (BHA) has been developed rapidly to control well trajectory. 随着钻井技术的进步，以控制井眼轨道为目的的下部钻具组合发展迅速。
In routine overbalanced drilling, the bottom hole pressure towers above the formation pressure so that the mud fluid will leak into the formation. 常规过平衡钻井方式打开油气层时，井底压力高于地层压力，钻井流体会向地层渗滤甚至漏失。
The modified isochronal well test data with bottom hole liquid loading will have abnormity,causing a fail of processing with the original theory or much error. 存在井底积液的修正等时试井资料会出现异常,使原有理论无法处理相应的测试资料或处理的结果误差较大。
The given reservoir dimensionless pressure express formula and pressure drop curves can be used in condensate gas wells and the gas wells with accumulated fluid in bottom hole. 给出的气藏无量纲压力表达式及压降曲线，还可适用于凝析气井及井筒带积液的气井。
In the course of transmission, mud pulse signal mainly disturbed by drilling pump,engine in the bottom hole, air bladder contained in mud and movement of drilling equipment. 泥浆脉冲信号在传输过程中主要受钻探泵、井底动力机、泥浆中的气泡及活动钻具的干扰;