FIELD: oil and gas industry, particularly blowout preventers for well bore sealing.
SUBSTANCE: preventer has body, bonnet connected to the body and cooperating with the body near each of at least two opposite side orifices formed in the body. Radial fixing means is connected to each bonnet to provide cooperation with it. Radial fixing means is adapted to secure each bonnet to the body near inner perimeter of at least two side orifices. Door is connected to the bonnet. Radial fixer is arranged inside the body. Device for radial fixer actuation provides fixer displacement in radial direction so that fixing contact is established between bonnet and body near at least two side orifices. Device for radial fixer displacement is shifted in axial direction. Radial fixer is shifted in radial direction. Bonnet packing member and means to provide tight contact between bonnet and side orifice are used.
EFFECT: improved ability of preventer maintenance.
50 cl, 25 dwg
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