Patent ID: 8522877

Claim:
A sliding sleeve valve locking assembly for use with a sliding sleeve valve having a) an outer housing defining a flowbore and a lateral flow port disposed through the housing; and b) a sliding sleeve member disposed within the flowbore and axially moveable within by a shifting tool disposed within a wellbore from a surface location between a first, open position wherein the lateral fluid flow port is not blocked by the sliding sleeve member and a second, closed position wherein the lateral fluid flow port is blocked by the sliding sleeve member, the locking assembly comprising: the outer housing defining a locking bore portion having a first locking groove formed therein; a sliding sleeve collet member that is moveably disposed within the outer housing, affixed to the sliding sleeve member and having a collet finger with a tab shaped and sized to reside within the first locking groove to correspond to one of the first or second positions for the sliding sleeve valve; a collet locking member that is moveably disposed by the shifting tool within the sliding sleeve collet member to selectively lock the sliding sleeve collet member within the locking bore portion; and a second locking groove formed within the outer housing that is shaped and sized to permit the tab of the collet finger to reside within an corresponding to the other of the first or second positions for the sliding sleeve.