Selective fracturing tool

摘要

A tool for selectively treating a wellbore with fluid that includes a tubing string having a sidewall defining an inner bore, the sidewall comprising a flow area having at least one fluid flow port that permits fluid flow through the sidewall. Fluid is prevented from flowing through the flow area when a closure is in a closed position. When in the open position, fluid flows through the flow area. An axial seal is connected to the closure to selectively close the inner bore against fluid pressure to apply the predetermined opening force to move the closure to the open position. A releasable connector connects the axial seal to the closure and a retrieval tool attachment releases the axial seal from the closure upon application of a predetermined release force by a retrieval tool.

主权项

1. A tool for selectively treating a wellbore with fluid, comprising:
tubing having a sidewall defining an inner bore, the sidewall comprising a flow area having at least one fluid flow port that permits fluid flow through the sidewall; a closure positioned over the flow area, the closure movable from a closed position that prevents fluid flow through the flow area to an open position that allows fluid flow through the flow area upon application of a predetermined opening force; an axial seal connected to the closure, the axial seal selectively closing the inner bore against fluid pressure to apply the predetermined opening force to move the closure to the open position; a releasable connector connecting the axial seal to the closure; and wherein the tubing comprises multiple flow areas axially spaced along the sidewall, each flow area having an associated closure, axial seal, releasable connector, and retrieval tool attachment; and wherein the releasable connector comprises:
a diameter reducible sleeve that engages the closure; anda locking sleeve having a locking position over the diameter reducible sleeve and a release position axially shifted from the diameter reducible sleeve, the locking sleeve being shiftable to the release position upon application of the predetermined release force.