an example of actuators known in the art and hydraulically controlled but it is understood that the actuator may be hydraulically electrically mechanically magnetically or otherwise controlled as is known in the art the actuator assembly 16 axially displaces mandrel 50 along the interior of outer housing 14 preferably mandrel 50 is connected to choke assembly 12 through locking assembly 20 and adjustment assembly 18 as shown however other arrangements can be employed as desired mandrel 50 includes profile sleeve 52 and is attached thereto by latch ring assembly 54 mandrel 50 and sleeve 52 may be integrally formed but for tool assembly purposes are preferably separate profile sleeve 52 moves axially along the interior wall surface 46 of the outer housing 14 upward movement of sleeve 52 is limited as seen in fig3 a c by contact between mating shoulder surface 56 on the upper end 60 of mandrel 50 and corresponding shoulder 58 defined by the interior surface 46 of outer housing 14 mandrel 50 is hydraulically reciprocally actuated hydraulic supply lines not shown supply hydraulic pressure at upper and lower hydraulic inlets 60 and 62 as seen in fig4 pressure is transmitted along upper and lower hydraulic passages 64 and 66 and upper and lower hydraulic ports 68 and 70 which are preferably defined within housing wall 44 as shown hydraulic inlet ports 60 and 62 may be attached to a hydraulic control line fitting 63 as seen in fig3 upper hydraulic port 68 supplies hydraulic pressure to upper hydraulic chamber 72 in the annular space between mandrel 50 and outer housing wall 44 upper piston 76.