Patent ID: 6186236
Filing Date: 2001-02-13
Classification: E21B

Abstract:
A method of fracturing a plurality of zones in a well comprising the steps of:(a) closing the well below a first one of the zones;(b) positioning a first casing packer between the first zone and a second zone;(c) positioning a second casing packer above the second zone;(d) providing a tool assembly comprising:a tool packer;a crossover positioned above said tool packer; anda concentric wash pipe positioned below said tool packer and having an inner wash pipe portion and an outer wash pipe portion;(e) positioning said tool assembly through said first and second casing packers such that a lower end of said tool assembly is adjacent to the first zone;(f) fracturing the first zone by pumping fracturing fluid through said tool assembly and monitoring progress of the fracturing operation at the surface;(g) repositioning said tool assembly such that a lower end of said tool assembly is adjacent to the second zone; and(h) fracturing the second zone by pumping fracturing fluid through said tool assembly and monitoring progress of the fracturing operation at the surface.