Finding a downhole window using an extendable dog

摘要

An apparatus for finding a pre-existing downhole window includes a body having a deflector ramp 105, a cavity, and an extendable dog 108 disposed in the cavity. The dog 108 is mechanically moveable between a retracted position and an extended position into the preexisting window. In some embodiments, the apparatus includes an axially moveable sleeve 110 disposed adjacent the extendable dog 108. In certain embodiments, a fluid flow path extends through the running tool and the deflector to the window finding assembly. The tool may be coupled to a washout tool. In some embodiments, a shear bolt (130, fig 4A) removably couples the running tool to the deflector and includes 105 a fluid passage fluidicly coupling a flow line in the running tool to a flow line in the deflector.