Patent ID: 8727010
Filing Date: 2014-05-20
Classification: E21B

Abstract:
1. A tool for selectively treating a well with fluid, comprising: tubing having a sidewall defining an inner bore; a flow port defined through the sidewall for communicating fluid from the inner bore through the sidewall; a first closure within the tubing shiftable between a closed position for blocking communication of fluids through the flow port, and an open position for permitting communication of fluid through the flow port; a first axial seal for selectively closing the inner bore to block all fluid flowing through the tool in a downstream direction, the first axial seal being connected to the first closure for applying, when closed, a force to move the closure to the open position; a first releasable connector for connecting the first axial seal to the first closure, and a downstream end located on the first axial seal specially adapted for connecting to a second axial seal of a second closure downstream from the first axial seal.