Several testing techniques for filled diamonds aredetailedly discussed,which include the applications andanalystical results of magnified observation,X-rayfluorescence,X-ray photogram,infrared spectrum,Ramanspectrum.

Application of grey related method in analysis of influencing factors on backfill drilling hole′s life

The use of backfill drilling holes in Jinchuan diggings was investigated in view of the problem that the abrasion of pipeline in backfill drilling holes always results in the crapping of drilling holes.

A method of calculating productivity for gravel packed well;

There exist many factors influencing the productivity in gravel packed and sand controlled wells, its correlation is complex, a precision and practical model for prediction is hard to be established by using conventional theory.

Based on what had been done previously in the aspect of pressure losses across perforation and gravel pack, the paper presents a new formula to calculate the pressure losses across perforation and gravel pack,and calculates the skin factor through the introduced popular equation of radial flow.

Field experiment of SLCH gravel packing sand control technology in the horizontal wells;

Influence factors of gravel packing in horizontal well with numerical simulation;

Simulation research on the gravel packing sand control in the horizontal well;

According to the comparison between different grading schemes and filling effects of stones, this paper proposes the optimized scheme for stone filling,which is of guiding significance for water diversion and debris barring of hollow-block sloping dike.