利用测井资料求取岩石的可钻性是一种简便可行的途径。
It is a simple and feasible approach to calculate rock drillability from log data.
能量法岩石可钻性测定系统是通过采集钻井井口岩屑并利用微机来测定岩石的可钻性。
By sampling the drill cuttings and using a microcomputer at the well site, the rock drillability can be determined by the energy law measure system.
该过程反映了井底岩石的卸载效应，是深井岩石可钻性的一个新概念。
This is a response of the bottom - hole unloading effect on rock drillability which is a new concept of deep well drillability.
深部井眼岩石力学的研究，特别是深部井眼岩石可钻性和岩石各向异性的研究，是解决深井、超深井钻井关键技术的重要课题。
Study on rock mechanics of deep wellbore, especially on rock drillability and rock anisotropy is a key project to resolve the problems of deep or ultra-deep well drilling.
室内岩石微可钻性测试是测井预测岩石可钻性的实验基础。
Rock drillability test is the foundation of prediction rock drillability from well logging data.
经现场检验，分形法确定岩石可钻性级值具有较高的精度。
Practically it proves that the fractal method has higher precision to ascertain rock drillability grade.
该仪器结构简单，具有多种功能，可进行回转或冲击回转钻进法的可钻性测试及钻进规程的模拟，也可用来测试岩石研磨性。
This instrument, simple in structure and of multi-function, may be used to measuring the drillability and abrasivity of rocks, and simulate rotary or rotary-percussive drilling as well.
岩石力学性质和可钻性是分析和评价岩石抵抗破碎和钻进的基本性质，也是合理选择碎岩工具和工艺的基础。
The mechanical property and drillability of rocks are the basic quality available for analyzing and evaluating the anti fracture and drilling resistance of rocks.
岩石可钻性是优选钻头，制定生产定额以及降低钻井成本的基础。
Rock drill-ability is the basic parameter to optimize bits, make drilling plan and reduce drilling cost.
岩石可钻性和可爆性研究是凿岩爆破领域的基础性课题，同时也具有重要的实际意义。
The study of Rock drillability and blastibility is a basic topic in the fields of drilling and blasting, it has important practical meaning also.
准确预测和计算岩石的力学性质和可钻性是有针对性地优选钻头、优化设计参数，从而提高钻井速度的重要依据。
Exact Prediction and calculation of mechanical property and drillability of rock can provide the necessary base for the optimization of bits and designing parameters, thereby quickening penetration.
钻头类型通常用岩石可钻性级值的大小来选择。
The value of rock drillability is usually used to select the type of bit.
目前，国内外关于新探区野猫井的岩石可钻性钻前预测方面的研究很少。
Nowadays, at home and abroad, there are few reports about how to predict rock drillability of wildcat well before drilling in new exploration area.
开展深层岩石可钻性研究，研制和引进适合深层砂砾岩体的高效钻头。
Drillability of the rocks in deep zones should be researched and effective bit fits for deep glutenite should be developed and introduced.
本文用试验方法研究了石油钻井过程中井底岩石零孔隙压力条件下的岩石可钻性。
Rock drillability of rock samples was studied by means of experiment under zero pore pressure and simulated down hole conditions.
现有评价方法不能满足对缺少测井资料和岩心资料的野猫井的岩石可钻性进行钻前预测的需要。
For wild well, there are lack of logging data and core data. Therefore, present evaluation methods of rock drillability can not be applied to predict rock drillability of wildcat well before drilling.
预先评价未打开地层的岩石可钻性分布规律，对钻井施工提供指导是有实际意义的。
Evaluating rock drillability distribution rule before strata has been opened has practical significance to guidance of drilling construction.
试验结果表明，随着井深的增加，井底岩石卸载量亦增加，岩石可钻性级值存在一个由增加变为减少的趋势。
The results of drillability grade shows a bow-shaped curve the unloading force rising as increasing the well depth.
靠近井壁区域存在应力集中现象，岩石可钻性变差，这是PDC钻头外侧易损坏的原因。
There is stress concentration near borehole wall, where rocks drillability gets worse. It is explained that the side of PDC bits is easy to be damaged.
对石油钻井过程中岩石破碎的分形机理及形成过程进行了研究，提出了一种以井底返出的岩屑为对象测试岩石可钻性的新方法。
This method takes the detritus returned from bottom hole as the studying object. The fractal mechanism and forming process of broken rock during drilling were studied.
对石油钻井过程中岩石破碎的分形机理及形成过程进行了研究，提出了一种以井底返出的岩屑为对象测试岩石可钻性的新方法。
This method takes the detritus returned from bottom hole as the studying object. The fractal mechanism and forming process of broken rock during drilling were studied.
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