a plug or valve to control fluid flow in the parent and or branch wellbores etc the whipstock assembly 18 includes a whipstock 20 having an upper deflection surface 22 a wiper or seal 24 and one or more keys lugs or dogs 26 for engagement with the latch profile 16 the deflection surface 22 is used to deflect cutting tools such as mills and drill bits to drill the branch wellbore outward from the parent wellbore 14 the seal 24 is used to prevent debris from fouling the latch profile 16 or from falling down into the parent wellbore 14 therebelow the keys 26 are complementarily shaped relative to the profile 16 and may be continuously radially outwardly biased or they may be selectively actuated to extend outward into engagement with the profile when desired as used herein the term u201c whipstock u201d is used to designate any type of deflection device which may be used in a well to deflect an object from one wellbore to another attached to a lower end of the whipstock assembly 18 is a running tool 28 the running tool 28 is used to install the latch profile 16 in the casing 12 specifically the running tool 28 is used to outwardly expand a latch structure 30 on which the latch profile 16 is internally formed the latch structure 30 may be a circumferentially continuous generally tubular shaped structure with the latch profile 16 formed on an interior surface thereof however it is to be understood that the latch structure 30 could be otherwise shaped.