Downhole sleeve assembly and sleeve actuator therefor

A treatment system comprising:

• a completion string having a plurality of sleeve valves therealong, each sleeve valve having a sleeve housing having a bore fit with an axially shiftable sleeve, each sleeve having an annular profile formed intermediate the sleeve;
• and
• a shifting tool having:
• an activation mandrel connected to a J-Slot mechanism having a J-Pin operable in a J-Slot housing and a drag block for restraining the housing;
• one or more dogs supported on one or more pivotable arms, the one or more pivotable arms and one or more dogs supported about and movable axially along the activation mandrel, each of the one or more dogs being radially actuable between a radially outward biased position, a sleeve profile-engaged position, and a radially inward collapsed position;
• springs for biasing each of the one or more dogs radially outwardly from the activation mandrel;
• a retainer ring movable axially together with the activation mandrel for actuating the one or more pivotable arms between the radially outward biased position and the radially inward collapsed position;
• a cone movable axially along the activation mandrel between two positions, an engaged position with the one or more dogs to lock them in the profile-engaged position, and a disengaged position;
• and
• a packer for sealing to the sleeve, the packer sealing to the sleeve in the cone's engaged position;
• wherein
• the axial length of the sleeve valve is about the axial length of the packer, cone and the one or more dogs.