Description:

Body Material: 4140

O-ring Material: Viton-70 Durometer

Disk Material：Ceramic

Single Pressure-Activated Vent sub is a kind of underbalance valve used in TCP operations. After arriving at the expected location ,the packer is seated ,the pressure between casing and tubing is separated .Increasing the pressure on the ground until the pressure is expected pressure ,the shear pin in the sub will be sheared .Then the sliding sleeve will move upward .the produce hole is opened So that the path between casing and tubing below packer is opened . So the reservoir fluid may flow into the tubing