RIC finger sleeve underwater medium hydraulic shearing device

The invention provides an RIC finger sleeve underwater medium hydraulic shearing device. The RIC finger sleeve underwater medium hydraulic shearing device comprises a conical guide barrel, a shearingbox, a square positioning sleeve and a lower guide sleeve. The conical guide barrel is mounted at the upper end of the shearing box. A shearing cylinder is fixedly mounted in the shearing box, and a finger sleeve stretching into the shearing box through the conical guide sleeve is shorn, wherein the shearing cylinder comprises a cylinder body, a piston and a shearing blade, the cylinder body is fixed into a shearing box shell, an oil way passageway is formed in the cylinder body, and an opening of the oil way passageway is formed in the front end in the cylinder body. The piston is mounted inthe cylinder body, a cylinder cover is mounted on the rear portion of the cylinder body, and two through holes are formed in the cylinder cover, wherein the middle through hole is connected with the rear end of the piston, and