Downhole tools, system and method of using

摘要

A downhole tool comprising a nested sleeve moveable from a closed position to an open position following actuation of a fluid control device. The fluid control device may selectively permit fluid flow, and thus pressure communication, into the annular space to cause a differential pressure across the shifting sleeve, and thereby moving the shifting sleeve to an open position. A static plug seat is positioned in the tubing or casing upwell of the downhole tool. When the shifting sleeve is opened, fluid flow is established through the static plug seat, allowing a dissolvable or disintegrable ball or other plug to engage the plug seat, preventing fluid flow past the plug seat to the opened downhole tool, thereby permitting pressurization of the tubing or casing, such as for a pressure test. Disintegration of the ball allows fluid communication to be re-established with the downhole tool, permitting fluid to flow through the tubing for subsequent operations.

主权项

1. A downhole system including a tool having an interior flowpath and an exterior, the downhole system comprising:
the tool comprising:
an inner sleeve;a housing positioned outwardly of said inner sleeve, said housing and said inner sleeve partially defining a first space therebetween;a shifting sleeve occupying a portion of said space;said space in fluid isolation from the interior flowpath and comprising an upper pressure chamber at least partially defined by said shifting sleeve; and a plug seat positioned proximally above said downhole tool and capable of receiving a plug to prevent fluid communication through the plug seat to the downhole tool; wherein said shifting sleeve has a first position in which the shifting sleeve prevents fluid communication between the interior flowpath and the exterior and a second position wherein the shifting sleeve does not prevent fluid communication between the interior flowpath and the exterior.