岩石钻

According to the summary of the methods to evaluate the formation drilling resistance, the rock drillability and abrasiveness were selected to be the standards.

总结目前地层抗钻特性评价方法，选取岩石可钻性级值和岩石研磨性作为评价标准。

Based on indoor measurement of rock acoustic velocity,drillability, rigidity ,uniaxial compressive strength,the relationship between acoustic velocity and fragmentation parameters of rocks and that between the surface acoustic velocity and the underground mine logging acoustic velocity were explored by regression analysis.

在室内测定岩石声波速度、可钻性、硬度、单轴抗压强度试验的基础上，利用回归分析方法，探索声波速度与岩石机械破碎性能参数之间、地面声波速度与井下测井声波速度之间相关关系，建立了利用测井声波速度预测地层岩石机械破碎性能参数的数学模型，介绍了预测剖面及资料验证结果，并将这一方法用于计算PDC钻头可钻性以及中国南方海相碳酸盐岩地层的岩石力学参数。

The correlation of rock drillability in perpendicular and parallel directions of the bedding plane of core samples was analyzed by means of mathematical statistics.

用数理统计的方法分析了垂直于层面和平行于层面岩石可钻性的相关关系，用垂直于层面岩石可钻性的评价方法评价了平行于层面岩石可钻性，由此导出根据垂直于层面岩石的可钻性评价地层可钻性各向异性的模型。

Thus the mathematic model can predict anisotropy of drillability by using rock drillability in perpendicular direction to the bedding plane of formation.

由垂直于层面方向的声波速度计算出垂直于岩石层面方向的岩石可钻性，从而可以对地层可钻性各向异性及造斜特性进行评价。

Correlation of drillability anisotropy index of the roller cone bit and PDC bit, the difference between drillability of the roller cone bit in perpendicular and horizontal directions of the bedding plane with the P-wave velocity anisotropy coefficient are studied respectively by means of mathematical statistics. A mathematical model is established for predicting drillability anisotropy index by using P-wave velocity anisotropy coefficient.

用数理统计方法研究分析了牙轮钻头岩石可钻性各向异性指数、牙轮钻头垂直于和平行于地层层面方向岩石可钻性差值和PDC钻头岩石可钻性各向异性指数与纵波波速各向异性系数的相关关系，建立了用纵波波速各向异性系数评价地层可钻性各向异性的模型。

A rock drill having cruciform cutting edges; used in mining.

有十字形钻头的岩石钻；用于采矿。

Because of rock formation drillability is very important to our dilling program,we need to design one equipment to test the rock formation drillability,which is rock formation drillability experment equipment..this equipment is delight and dependentable,which can quickly testing the rock formation drillability,This equipment has wide useful feature.

因为岩石可钻性对钻井工程有很重要的作用，所以我们需要设计一台测定岩石可钻性的实验设备，即岩石可钻性试验机。该设备轻便、可靠，能方便、快捷的测定岩石的可钻性，具有广阔的应用前景。

Based on the selection of similar structure, a method for predicting the rock drillability of wildcat well is proposed.

该方法首先应用已钻相似构造井的地震资料、测井资料以及岩心测试资料，建立岩石可钻性钻前预测遗传神经网络模型，然后将神经网络与遗传算法有机结合起来，以神经网络理论为基础，利用遗传算法优化隐含层神经元个数和网络连接权值，最后利用野猫井的地震资料进行岩石可钻性钻前预测。

The company has strong product development strength, internal combustion series of rock-drilling machine, electric drilling machine, pneumatic rock drill, electric rock drilling, rice and wheat combine harvesters and so is my company's independent development.

公司有较强的产品研发实力，系列内燃凿岩机、电动凿岩机、气动凿岩机、电动岩石钻、稻麦联合收割机等均是我公司自主开发的。

A rock-boring tool used in mining for sinking shafts.

有十字形钻头的岩石钻；用于采矿。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。