Failure investigation and preventing for well tube thread;

A neutral program for generating the tube thread and a data interface(compiler) are developed according to ISO13584 criterion in the meantime.

Non-contact tubing thread intelligent detection based on computer visualization technique;

The author analyzes the impacts on tubing thread linking intensity of hydraulic tong with the finite element method,the Von Mises and contact pressure distributes of casing thread liking in condition of different holding position for backup tong have been obtained,and he puts forward the technological transformation measures of hydraulic holding system,designs a three-plate-style-tong-door.

An analysis is made of the factors affecting the reliability of numerically-controlled processing line of tubing threads.

This paper focuses on computational analysis of casing threads joint performance in the steam injecting well.

A finite element two-step casing connection model is founded to analyze the force on the casing threads by using the contact analytical model.

Study on working feature of J55 tube thread;

Image Processing Method Study of Tube Thread;

Measurement of oil tube thread image;