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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!
Viscosity should be maintained above 45 sec/qt. Maintain with XCD rather than with Bentonite. Monitor hole cleaning at shakers and adjust low end rheology as required. 钻井液粘度应当保持在每夸脱45秒左右，要用生物聚合物来维护，不要用膨润土。通过振动筛观察井内是否干净，按要求把最终的流变参数调低。
Viscosity should not be below 45 sec/qt. Maintain with XCD rather than with Bentonite. Monitor hole cleaning at shakers and adjust low end rheology as required. 要使钻井液粘度不低于每夸脱45秒，就要用生物聚合物来维护，而不用膨润土。通过振动筛观察井眼是否干净，按要求把最终的流变性调低些。
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。
Monitor hole cleaning at the shakers and adjust the low end rheology as required.The dial 6 reading should not be below 5. 通过振动筛观察井内是否干净，按要求把最终的流变性能调低，旋转粘度计在6转的情况下，读数不低于5。
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。
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。
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。
Monitor hole cleaning at shakers and adjust low end rheology as required.Small additions of Unical can be made to control high rheologies but in the event of serious problems Miltemp should be used. 通过振动筛观察井内是否干净，按要求把最终的流变性调低，用少量的由尼克尔来控制流变性升高，如果问题较大，就用米尔太母处理。
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。
For the cuttings bed is unstable and it is easy to slide into bottomhole,it may be affect drilling speed and drilling safety and is the danger area of hole cleaning in directional drilling. 介绍江苏局安徽公司现阶段提高大斜度定向井井眼净化程度的系列技术措施,由于受其有效程度所限偶发井下复杂情况和事故。
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。
RSDS will control well path accurately, reduce torque and drag remarkably and improve hole cleaning condition obviously.The drilling practices of ERD will be more reliable if RSDS is used. 用旋转导向系统RSDS进行大位移井钻井，可望相当准确的控制井眼轨迹，大幅度减少钻柱所受的摩阻和扭矩，显著改善井眼的清洁状况。
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。