rotary-percussive drill

The method of rotary drilling hole and protecting hole wall by static mud is an advanced technique to drill hole.

静态泥浆护壁旋挖成孔工艺是一项先进的成孔工艺。

Analysis and improvement on fast feed circuit of KY-120 underground rotary drill

地下牙轮钻机快速推进回路分析与改进

Electrically driven rotary sidewall sampler ANALYSING DYNAMIC CHARACTERISTICS OF DRILLING STRING EDDY OF INSIDE CONTAINING DRILL FLUID

电动钻进式井壁取心器内含钻井液的钻柱涡动动力特性分析

After reformation of drill pump, rotary table and drilling rod, the triple-men portable rig has achieved good results when drilling is in breed zone by netting box and other land areas.

对三人钻机的压水泵、转盘、钻杆部件进行改进后，三人钻机在围网养殖区以及其它陆上钻井时，都取得了良好的效果。

There are few systematical formulas to calculate the roller number and the distances between rollers in crawler travel system of rotary pile drill.

旋挖钻机履带式行走装置支重轮之间的距离及其数量的多少，尚缺少系统的计算公式。

The results of research in this article would provide a theoretical and arithmetic method for the fluid-structure interaction analysis of the rotary slender shaft, the stirring shaft in the chemical engineering machinery and the rod string and drill string in the oil drilling and production engineering.

本文研究成果可为化工机械中的细长旋转轴和搅拌轴、石油钻采工程中的抽油杆柱和钻柱的固液耦合分析提供了理论基础和计算方法。

The structural characteristic and operating principles of KD type hydraulic tap hill drill with folding rotary mechanism are introduced.

详细介绍了KD型转臂折叠式全液压开铁口机的机构组成、工作原理和结构特点。

Our main products are electric drill, marble cutter, angle grinder, rotary hammer, pipe dredger, etc.

主要产品有手电钻 、 石材切割机 、 角向磨光机 、 电锤 、 管道疏通器等.

The mast assembly supports the rotary drill head and its hoisting mechanism.

支架元件支援转动钻头及其提升机构.

This paper introduced the application of new Hall sensor in the voltage and current regulation of the speed-regulation system of rotary three-cone bit drill and analyzed the mode of operation, the structural characteristic and the use result of the component element.

文章介绍了在牙轮钻机调速系统的电压、电流调节中，采用了新型霍尔元件，并具体分析了其工作方式、构成特性以及使用效果。