The Hydro-Trip Pressure Sub is installed in the Tubing String below a Hydrostatic Packer to provide a method of applying the tubing pressure required to activate the Packer. To set a Hydrostatic Packer, a ball is circulated through the Tubing and Packer to seat in the Hydro-Trip Pressure Sub and sufficient Tubing pressure is applied to activate the setting mechanism in the Packer. After the Packer is set a pressure increase to approximately 2500 psi shears the brass shears screws and the ball seat moves down until the finger snap back in to a groove in top sub. The Hydro-Trip Sub is then full opening and ball passes on down the Tubing.

NOTE: The Hydro-Trip Pressure Sub is installed in the Tubing String below of Liner Hanger to provide a method of applying the tubing pressure required to activate the LIner Hanger. After the Liner Hanger is set a pressure increase to approximately 3500 psi shears the brass shears screws