Structural features of the series extubation mainly by pump stations, extubation cylinder, base, slip seat, down kava and other component parts. The series extubation machine integrated pump station is fully enclosed structure, from the pull smooth, cylinder by force, and light weight, pull force, detachable good, easy handling migration, especially for the slope, tunnel , mountains and other construction sites. The series extubation slip seat cone hole can be placed in a variety of kava according to your needs, to grip the drill pipe and casing with different specifications. Use features "Rio" series of hydraulic pulling machines are drilling machinery auxiliary equipment for drilling from pulling guard bi casing and drill pipe, so that the next drilling apply. When slip grip casing or drill pipe when the reciprocating cylinder to pull from the casing and drill pipe.