In this paper,a horizontal screen piple completion technology is introduced,the working principle,structure,and technical parameters of the fast plug-drilling pipe string, the cement-filled resin blind ram,the open-hole packer,the cleanup acid with inverse circulation and inflate packer string are elaborated, and field application process and results are presented.

Using different back-washing methods – cold water, hot water and alkali lye to revive the membrane.

Production practice and backwash reformation of pressure filter for the residue of cyanidation;

Different amounts of reagents were added into discs with different filtration precision,the difference of the two kinds of filters in parameters of influent and effluent turbidity,suspended solids,periodic quantity of water produce,FPI,head loss,flux,backwash and so on were compared and studied.

PCF varying pore fiber filter is a water treatment device,which has such characteristics as high filtration accuracy,backwash thoroughly,filtration rate as high as 100 m3/(m2·h),low self water consumption.

The best parameter of inverse cleanup is defined through the analyses and calculation of water pressure on inverse washing and clearing of GSL high-speed filter.

Pressuring filter is one of the important devices in treatment of industrial water, whose working performance has direct influence on quality of water treated and its working performance depends on backflushing control.