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

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

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

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

Improvement and application of drilling pipe detecting equipment;

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

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

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.

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.

Optimized design of drilling rod structure parameter for screw miner;

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

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.

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

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

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