at a downhole end of extension sleeve 44 and is pinned in place rotationally by pin 48 reference to fig4 makes clear the construction of gear ring 72 including a plurality of gear teeth 74 and lead in ramps 76 to help facilitate engagement therewith by the key 56 to prevent rotational movement of the weight assembly when that assembly is engaged with the gear ring 72 prevention of rotational movement of the weight assembly means that all of the torque production capability of the orientation torque producer 58 in this embodiment a helical profile is available to turn the pin adapter 70 the pin adapter rotates within a pin adapter housing 78 which itself is joined to the extension sleeve 44 by a stop sleeve 80 the pin adapter 70 in this embodiment is supported within the housing 78 by a radial type bearing 82 and a thrust bearing 84 a seal 86 is provided between the pin adapter 70 and the spring compression mandrel 26 to seal the arrangement and working with seal 22 for pressure based operation at a downhole end of the arrangement 10 fig1 2 and 5 is a pin adapter tail 88 that features an orientation indicator such as a groove 90 that will always be in a position opposed to gravity when the arrangement is actuated because of the interaction between pin adapter 70 and weight assembly 50 which occurs at torque producer 58 of assembly 50 and a complementary profile 92 in this embodiment the groove thus allows an operator to connect a tool at a specific desired orientation in the wellbore one such tool is as illustrated here a perforation nozzle sub 94 having nozzle receptacles 96 it will.