Offshore pressure working device

The offshore working device under pressure includes a bottom plate on which a support frame is fixed, and is characterized in that a lower platform, a middle platform, an upper platform and an upper platform are fixed at intervals from bottom to top on the support frame; wherein the lower platform is provided There is a special annular blowout preventer, under which a single ram blowout preventer is installed; the third special annular blowout preventer is installed in the middle platform, and a high pressure is installed under the three special annular blowout preventers A closed expansion joint. Two special annular blowout preventers are installed under the high-pressure closed expansion joint; a cable nipple, an oil unloading tube and a fourth special annular blowout preventer are arranged in sequence under the upper platform; fixed above the upper platform There is a floating beam, the floating load-bearing slips are installed in the floating beam, a fixed beam is fixed at the top of the support frame, and fixed slips are installed on the upper and lower sides of the fixed beam; installed inside the support frame There is a lifting cylinder, and two lifting cylinders are installed on the outside of the support frame.