- It is very simple and convenient to use gas drainage hole packer. Connect the joint of gas drainage hole packer and the watercourse or air pump on the operation spot. Then connect the steel tube and gas drainage tube. And insert the gas drainage hole packer into the drilling hole totally. The rubber hose of gas drainage hole packer expands in certain pressure to achieve hole plugging, water injection or gas drainage.
- Gas drainage hole packer can be used repeatedly for many times. Remove pressure after the water injection or gas drainage is completed, and the gas drainage hole packer will restore to its original shape. Then take out gas drainage hole packer.
- The operation with pressure is forbidden in the inserting and recycle of gas drainage hole packer.
