External clamping type top drive casing running device

An outer clamping type top drive casing running device comprises a slip bowl and a slip body assembly, the slip body assembly is movably arranged in the slip bowl along the axis of the slip bowl, a reset piece is arranged on the slip bowl, the slip body assembly slides along an inclined face on the inner wall of the slip bowl, and contraction or expansion of the slip body assembly is achieved; the slip body assembly shrinks to clamp the sleeve; and the slip body assembly expands to loosen the sleeve, and the reset piece attracts the slip body assembly to reset to the storage position, so that the outer wall of the slip body assembly is attached to the inner wall of the slip bowl. The slip body assembly slides along the inclined plane on the inner wall of the slip bowl, so that the slip body assembly clamps and loosens a casing pipe, the reset piece is arranged to form an adsorption effect on the slip body, and the slip body can be adsorbed outwards to a storage position when the slip body assembly is in a loo