workability of rock

Fractal representation of rock drillability;

地层岩石可钻性的分形表示方法

Feasibility analysis of fractal characteristics of rock drillability;

岩石可钻性分形法的可行性分析

Theory and approach of identification of ground interfaces based on rock drillability index;

基于岩石可钻性指标的地层界面识别理论与方法

Use of the effect measure analysis can conduct relative rating of rock blastability while at thesame time complete the systematical analysis of it,which is an information analysis method featured with simpleand fast calculation,flexible application and high adapability.

应用效果测度分析方法，可在完成岩石可爆性相对分级的同时，也完成了岩石可焊性的系统因素分析，是一种计算简捷快速、应用灵活、适用性强的信息数据分析方法。

A mathematical model using the fuzzy hierarchy analysis for rock blastability appraisal is presented;the basical principle and the calculation of this method are described;and is applications are illustrated by fieldcases.

提出了应用模糊层次分析法评价岩石可爆性的数学模型，阐述了该方法的基本原理和计算方法并结合实例说明了该方法的应用。

The common method of measuring drillability was based on interior experiment.

目前确定地层岩石可钻性的方法主要是基于室内微钻头实验测算岩心抗钻能力,这种方法需要大量的岩心,费用高,周期长,且常常滞后于实际钻进。

In view of many problems faced by drilling in the lower stratum in Xujiaweizi region, such as complex geologic structures, high grade value of rock drillability, low drilling rate, slow footage, and long drilling cycle, it is urgent to correctly predict the grade value of rock drillability which will provide powerful references for a better drilling plan in reasonable way.

针对徐家围子地区下部地层的复杂情况,岩石可钻性级值较高,钻井机械钻速低、进尺慢和钻井周期长的问题,迫切需要准确预测徐家围子地区下部地层的岩石可钻性级值,为科学制定钻井计划提供有力依据。

Drillability measurement under modeling conditions of bottom hole stress is very difficult.

模拟井底应力条件测量岩石的可钻性是非常困难的 ,而常压下岩石可钻性与井底围压下岩石可钻性相差较大 ,远不能满足工程需要 ;文章通过室内试验 ,建立了岩石可钻性级值与岩石力学参数的相关模型 ,再把井底围压下的岩石力学参数代入此模型中计算 ,可以得到井底应力条件下的岩石可钻性级值。

Experimental Studies of Rock Drillability and Rock Mechanics of Deep Well-bore

深部井眼岩石可钻性与岩石力学特性实验研究

Rock drillability investigation for ultra-deep well drilling at thrust structure of Kuqa depression

库车坳陷山前构造超深井岩石可钻性研究

Interaction Model between Formation and Bit during the Elliptic Distribution of Rock Drillability

岩石可钻性呈椭球型分布时地层与钻头相互作用模型

physical-mechanical properties and drillability of rocks

岩石物理力学性质与可钻性

Study on Rock Drillability of the Tamtsag Basin

塔木察格盆地岩石力学参数和可钻性实验研究

This drill can bore through rock.

这台钻机能钻透岩石.

A needle-shaped drill for boring holes in rock or masonry.

钻头，钻石器，钻孔器用于在岩石或砖石上钻孔的针形钻

Study on Electroplated Diamond Bit for Extra-hard, Compact and Weak-abrasiveness Formation;

坚硬致密弱研磨性岩层电镀金刚石钻头研究

Development of the software on the diamond bit type selection according to formation rock property

根据地层岩性进行金刚石钻头选型的软件开发

Study on Nonlinear Dynamics Action of Integrated Bit-Rock-Drillstring-Well System;

钻头—岩石—钻柱—井壁互作用下系统耦合非线性动力学研究

diagonal cut rock drill plus bits

对角十字形岩石钻头

rock-bit interaction model

岩石-钻头互作用模式

rock-bit interaction

岩石与钻头互相作用

Geologists, scientists who study rocks,indicate the likely places to the oil drillers.

研究岩石的科学家即地质学家给石油钻井工指明可能产生油处。

Magnetic Petrology of the High Fe-Ti Eclogite from the Chinese Continental Scientific Drilling(CCSD) Main Hole

中国大陆科学钻探主孔高铁钛榴辉岩的磁性岩石学

Diamond core drilling equipment conventional system

GB/T16950-1997金刚石岩心钻探钻具设备

drill ,electric, hand-held (incl. rock drills)

电动钻具,手持式（包括岩石钻具）

The strength of rock may be generally regarded as a measure of resistance of rock in breaking-up.

岩石坚固性可视为岩石抵抗破坏的一种度量。