Patent ID: 7980299
Filing Date: 2011-07-19
Classification: E21B

Abstract:
1. A method of treating a subterranean formation having a wellhead, a vertical borehole, casing secured in the vertical borehole, and a deviated borehole extending radially from the vertical borehole and through the subterranean formation, the method comprising the steps of: (a) attaching a treating solution dispersing tool onto a working string, the working string made up of a plurality of pipe joints, for extension into the extremity of the deviated borehole extending radially from the vertical borehole and through the subterranean formation; (b) attaching to the working string a seal member for sealing the working string in sliding engagement with the casing; (c) attaching a perforated nipple in the working string above the seal member; (d) positioning a check valve member in the working string above the perforated nipple for preventing upward flow in the working string; (e) positioning a sealing element at the wellhead between the working string and the casing allowing relative movement of the working string within the casing; (f) pumping treating solution into an annulus between the casing and the working string, through the perforated nipple, into the working string, and out through the dispersing tool, into the deviated borehole and the formation; (g) maneuvering the working string within the deviated borehole while pumping the treating solution into the deviated borehole through the dispersing tool; and (h) uncoupling one or more pipe joints of the working string while pumping the treating solution into the deviated borehole through the dispersing tool.