Evaluation of Allowable Borehole Fluid Pressure during Horizontal Directional Drilling in Rock

机译：岩石水平定向钻进时允许钻孔流体压力的评估

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Guidance regarding the calculation of maximum allowable borehole fluid pressure during horizontal directionalrndrilling (HDD) is ambiguous in soil and nearly nonexistent in rock. Recent experience drilling in highly fracturedrnSouthern California rock indicates that mechanisms governing rock behavior under fluid pressure may differrnsubstantially from the traditional soil models. This paper reexamines the soil models available to calculate maximumrnallowable borehole fluid pressure during HDD and adapts those methods to the evaluation of maximum allowablernpressure in rock. The adaptations incorporate theoretical rock mechanics based on the Hoek-Brown failure criteria.rnFinally, the investigation is calibrated against groundwater response data and manifestations of hydraulic fracturingrnduring HDD operations at the White Point Landslide Project.

机译：在水平定向钻井（HDD）期间，有关最大允许井眼流体压力计算的指导在土壤中含糊不清，而在岩石中则几乎不存在。最近在南加利福尼亚南部的一块高裂缝性岩石中钻探的经验表明，在流体压力下控制岩石行为的机理可能与传统的土壤模型大不相同。本文重新审查了可用于计算HDD期间最大允许井眼流体压力的土壤模型，并使这些方法适用于评估岩石中最大允许井眼压力。改编书中包含了基于Hoek-Brown破坏准则的理论岩石力学。最后，针对白点滑坡项目的HDD作业中的地下水响应数据和水力压裂表现对研究进行了校准。

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《North American Society for Trenchless Technology (NASTT) no-dig show》|2015年|MA-T2-02.1-MA-T2-02.8|共8页
会议地点 Denver CO(US)
作者
Jason Buenker;
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作者单位

Shannon Wilson, Inc., Glendale, California;

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正文语种 eng
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4. Evaluation of Allowable Borehole Fluid Pressure during Horizontal Directional Drilling in Rock [C] . Jason Buenker North American Society for Trenchless Technology no-dig show conference . 2015

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Evaluation of Allowable Borehole Fluid Pressure during Horizontal Directional Drilling in Rock

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