MSZ tool joint taper tap internally engages and retrieves a drill pipe from a well by tapping into its tool joint.
The taper tap is a tube section made of alloy steel. It has thread connection at the upper end, and external fishing thread, that is carburized and quenched, at the lower end. Lengthwise flutes across the fishing thread facilitate the tapping.
The taper tap has a watercourse for fluid circulation.
The taper tap is used for retrieval of drill pipes with damaged tool joint.