mandrel 20 are considered as possible alternative embodiments as long as they perform the required function affixed to one end of the mandrel 30 is a slip cone 30 that is beveled on its lower end 31 and terminates on its upper end 32 with a connection to the sub upper connection 12 slidingly connected to the outer surface of the mandrel 20 is a slip assembly 40 the slip assembly 40 includes at least one rocker slip 42 at least one drag block 44 and springs 46 as is well known when the anchoring sub 10 is inserted into a wellbore the drag blocks 44 are designed to contact the inner surface of the wellbore which is often lined with downhole casing the magnitude of the contact force is designed to be sufficient to provide a resultant upward force onto the slip assembly 40 and slide the slip assembly 40 upward along the mandrel 20 however the contact force is not of sufficient magnitude to prevent the anchor sub 10 and other possible devices attached to the anchor sub 10 from being easily lowered within the wellbore when the slip assembly 40 is allowed to slide up the mandrel 20 until.