The length of downhole tubing and sucker rod must be precisely measured when oilwell maintenance or special measures are proceed in the oil field, in order to determine the operational site of down-hole equipment, aim to untapped oil layer, confirm the oilwell maintenance or special measures to work well.

End upsetting process for oil drill pipe and numerical simulation;

Research of Oil Drill Pipe Crack-detection System Based on Computer Vision;

Parameters that influence the end upsetting process and working procedure were studied in this paper, and the thermal-mechanical coupled rigid-plastic FEM was put forward to simulate the process of end upsetting for oil drill pipe.

A study on oil drill pipe end upsetting process;

Research on control technology of auto-cladding welding on drill pipe;

The failure of drill pipes mainly occurs in weld seams or inner upset transitional sections according to the experience accumulated by oil fields.

According to visual examination, chemical analysis,metallographic examination,mechanical inspection,scanning electron microscope examination and facture mechanics analysis of the failed N80(1) oil casing,the main reason for the failure of pipe is the combination of bad metallic phase,non-homogeneous chemical constitution and poor impact ductility.

Non quenched and tempered N80 oil casings of high quality have been produced on existing 180 production line at Baotou Iron and Steel(Group) Co.

When the K55 grade oil casing lathed thread,the thread flawed.

The Network Interface Design for Erosion-detecting Equipment of Petroleum Pipeline;

Study on application of bactericide in petroleum pipeline

Aiming at the Sino ?Russia petroleum pipeline diversion affair, the article makes a profound analysis to further estimate the present condition and the developing prospect of the petroleum need and supp.

Apply CAE to the optimum design of petroleum casing pipe;

In view of the trial-production of J55 hot-rolled coiled sheet for petroleum casing pipe,rolling process control and comprehensive quality of the products were analyzed.