Features

1、 This packer is a packer of a balanced type, which means that the pressure of upside and downside of the packer is the same. It is impossible to failure because of the overpressure of the upside. 

2、 It has a protective rubber packing element, high compression and a long service-life.

3、  It has the functions to prevent from midway sealing and to self-centralize, what prevent the influence of pipe column off-center moving from casing on the sealing effect of the packer.