Patent attributes
A downhole tool comprising a nested sleeve preventing fluid communication between the interior of the tool and the exterior of the tool is provided. The downhole tool is actuated when fluid pressure is communicated from the interior of the tool to a first surface the nested sleeve, moving the nested sleeve such that it no longer prevents fluid communication from the interior to the exterior. Devices and methods for controlling the flow of fluid to the first surface of the nested sleeve are provided including fluid control devices such as burst disks, indexing sleeves and ratchet assemblies. In certain embodiments, the nested sleeve may be engaged with a slot system such that the nested sleeve moves along a path defined by such slot until the tool is actuated.
