The application belongs to the technical field of
petroleum drilling equipment, and discloses an integrated hydraulic chuck device, which comprises a shell, end covers, an adjusting mechanism and a clamping mechanism. The end covers are provided in two, and the two end covers are respectively detachably fixed at the two ends of the shell. The adjusting mechanism and the clamping mechanism are arranged in the interior of the shell. The adjusting mechanism comprises two
piston guide blocks and two
piston bodies. The two
piston guide blocks are respectively fixedly connected with the two end covers. The piston bodies are respectively in sliding connection with the shell and the
piston guide blocks. The clamping mechanism comprises two jaw seats and two jaw bodies. The two jaw seats are respectively fixedly connected with the two piston bodies. The two jaw seats are respectively provided with dovetail grooves. The jaw body is installed on the jaw seat through the dovetail groove. The two jaw bodies are oppositely arranged to form a clamping hole. The application has compact structure and convenient jaw replacement. During work, the drilling rod can be conveniently and quickly clamped and released, and the operation difficulty and the
scratching risk are reduced.