Patent ID: 7748460
Filing Date: 2010-07-06
Classification: E21B

Abstract:
1. An apparatus for fluid treatment of a borehole, the apparatus comprising: a tubing string having a long axis and a wall defining an inner bore and an outer surface; a first closure accessible from the inner bore of the tubing string, the first closure closing a first port extending through the wall of the tubing string and preventing fluid flow through the first port, but being openable to permit fluid flow through the first port; a second closure spaced axially from the first closure and accessible from the inner bore of the tubing string, the second closure closing a second port extending through the wall of the tubing string and preventing fluid flow through the second port, but being openable to permit fluid flow through the second port, each closure openable independently from each other closure; a packer disposed about the tubing string between the first port and the second port, the packer operable to seal fluid communication between the first port and the second port along the outer surface; and a port-opening sleeve positioned in the tubing string and driveable through the tubing string to actuate the first closure to open the first port and the second closure to open the second port.