set back area是什么意思

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FEM analysis and design of the magnetizer on external thread testing of drill pipe;

钻杆外螺纹检测中磁化器的有限元分析与设计

The utilization of ultrasonic flaw detection in detecting drill pipe crassitude intermediate belt;

超声波探伤在钻杆加厚过渡带检测中的应用

Research on the modeling of simulation of the drill pipe of URRS'turning and bending system and simulation of the resistance;

径向水平井钻杆弯曲转向建模与阻力仿真研究

The technique analysis of drilling pipe frictional welding and heat treatment;

钻杆摩擦焊接及热处理工艺分析

Improvement and application of drilling pipe detecting equipment;

钻杆检测设备的改进与使用

Numerical calculation of temperature field for spray quenching on friction welding joint of drilling pipe;

石油钻杆焊缝气雾淬火过程温度场的数值计算

Comparative study on corrosion between drill stem S135 and valve plate Cr13 in diesel tail gas drilling environment;

S135钻杆和Cr13阀片在柴油机尾气环境中腐蚀行为比较研究

With the electromagnetism theory and the characteristic of the well-drilling equipment,the paper brings forward the engineering technique of using drill stem as antenna in the telemeteing system of well-drilling.

分析了制约钻井遥测发展的技术原因,结合电磁理论和钻井设备本身的特点,提出在钻井遥测系统中以钻杆为天线的工程技术,然后从多方分析了该技术的可行性和实用性,并在试验中得以证实。

This article introduces an easy way of deep machining and puts forward taking use of normal machine tool,simplifying craft installment,improving twist drill and connection types of drill stem by analyzing many influent factors on deep machining,which include discharging scrap,wear and tear,radiating and orientation.

本文介绍了一种简便的深孔加工方法 ,通过对深孔加工中排屑、磨损、散热和导向等诸多因素的分析 ,提出了利用普通机床 ,简易工装 ,改进麻花钻及钻杆的连接形式 ,在实践使用中取得了较好的效果。

Optimized design of drilling rod structure parameter for screw miner;

螺旋钻采煤机钻杆的结构参数优化设计

Optimization parameter unit of the inner upset transitional area of drilling rod;

钻杆内加厚过渡区参数优选

After reformation of drill pump, rotary table and drilling rod, the triple-men portable rig has a chieved 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。

Application of high pressure water jet technique in cleaning drill rod;

高压水射流技术在清洗钻杆中的应用

Effect of friction welding, heat treatment technology on the microstructure and property for drill rod S135;

S135钻杆的摩擦焊接、热处理对其组织与性能的影响

Special clamp for dismantling drill rod of LM-120 type drilling machine;

LM—120型反井钻机钻杆拆卸特殊卡具