Multiple shift sliding sleeve

摘要

A system of sliding valves wherein the inserts of multiple sliding valves may be shifted to an open position using a single shifting ball. Each individual sliding valve has a movable insert that, depending upon the position of the insert within the sliding valve, may either block or permit fluid to radially flow between the interior and exterior of the sliding valve. The insert has a profile about the interior of the movable insert allowing a shifting tool to connect to and move the insert so that fluid may be prevented from entering the interior portion of the sliding sleeve.

主权项

1. A downhole assembly comprising at least two sliding sleeves, each sliding sleeve further comprising:
a housing having an inner bore and having a port communicating the inner bore outside the housing; an insert located within the inner bore of the housing and having a resettable seat and a shifting profile, the insert in a first position blocking fluid flow through the port, the insert in a second position allowing fluid flow through the port, the resettable seat having a set condition in the insert in the first position and having an unset condition in the insert in the second position; wherein the resettable seat in the set condition is engagable in the insert to facilitate movement of the insert from the first position to the second position; and wherein the shifting profile is engagable in the insert to facilitate movement of the insert from the second position to the first position and to facilitate resetting of the resettable seat from the unset condition to the set condition; wherein the resettable seat in each of the at least two sliding sleeves is sized to be actuated by a single ball.