METHODS AND APPARATUS FOR A DOWNHOLE TOOL

摘要

An apparatus and method for operating a packer and a fracture valve is show n. The packer may include a tubular mandrel having a longitudinal bore with an annular packing element and a first piston disposed around the mandrel, wherein the first piston is operable to set the packing element, and a second piston operable to isolate fluid communication between the first piston and the mandrel bore. The fracture valve may include a tubular mandrel having a longitudinal bore and a port, a piston operable to close fluid communication between the bore and the port, and a latch dispose d between the piston and the mandrel operable to resist movement of the piston .