Patent ID: 9103178
Filing Date: 2015-08-11
Classification: E21B

Abstract:
1. A latch system for latching an apparatus to a latching member inside a tube through which the apparatus can travel, the latching system comprising: a latch body; a latch carrier slideably retained in the latch body, the latch carrier provided with a longitudinal slot; two or more latch dogs coupled to the latch body, each latch dog formed with at least two slots; and a plurality of pins, each pin coupled at its opposite ends to the latch body and wherein respective pins pass through one of the slots on each of the latch dogs and through the longitudinal slot in the latch carrier; the latching system having a latch position where the latch dogs extend from the latch body to a location enabling engagement with the latching member, and a release position where the latch dogs retract into the latch body to a position where the latching system can pass through the latching member, wherein the latch dogs move parallel to each other when the latching system moves between the latch position and the release position.