DOWNHOLE CROSSOVER TOOL WITH CHEMICAL TREATING OR PACKER INFLATION FEATURES

摘要

A crossover tool is disclosed that permits access through to the wash pipe below after the conclusion of a known gravel packing operation. A ball is trapped to a sleeve after shifting it so as to allow flow through th e crossover for acid treatment in the screen area and a reversing out procedur e to remove excess acid. Alternatively, pressure delivered through the wash pipe can operate packers, as part of a gravel packing procedure as outlined in two steps in U.S. Patent 6,311,772 is a single trip. The acid treating or other downhole operation through the wash pipe can also be accomplished in a single trip with the gravel packing assembly.