FT-V concave junk mill has concave hemispheric surface with cutting-crushing braze of tungsten carbide and is used to destroy metal objects and to mill cement during intervention in a cased hole.
The junk mill consists of a body and concave cutting-crushing braze of tungsten carbide. The concave bottom keeps the fish in alignment with the center of the mill, precluding the fish from getting cut into strips. It has thread connection at the upper end and circulation ports and relevant watercourses for better cooling and more efficient removal of cuttings. The lateral surface of the braze is ground flush with body OD.