shown in fig1 shuttle piston 50 is prevented from movement relative to upper body 36 by frangible connection means as tensile bolts 62 circumferentially spaced around upper body 36 in counterbore holes 64 counterbore holes 64 are plugged with pipe plugs 66 to ensure the pressure integrity of piston 46 shuttle piston 50 is a generally cylindrical member with stepped outer shoulder 68 adjacent to interior annular shoulder 60 lower skirt 70 extends axially downward from stepped outer shoulder 68 a plurality of flow ports 72 are circumferentially spaced around lower skirt 70 and allow drilling fluid to flow between the interior and exterior of shuttle piston 50 a plurality of laterally disposed and circumferentially spaced counterbore holes 74 are formed adjacent the lower end of lower skirt 70 frangible connection means as shear bolts 76 are positioned in holes 74 and threaded into mating holes in actuator rod head 78 actuator rod head 78 is an annularly shaped flange with a plurality of actuator rods 80 secured at its inner edge and circumferentially spaced actuator rods 80 extend axially from lower skirt 70 main body 38 of tool body 16 is secured to upper body 36 by threads 42 as noted above main body 38 is a generally cylindrically shaped member surrounding mandrel 12 actuator rod holes 82 are formed at the upper end of main body 38 and aligned with actuator rods 80 when installation tool 10 is assembled positioned on the exterior of main body 38 are a plurality of connection means as latching segments 84 that are axially moveable in tracks 86 formed on the exterior of main body 38 latching segments 84 are initially held in the up position of fig1 by frangible tensile bolts 88 extending.