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Hydraulic annular blowout preventers
The annular preventers are intended for wellhead sealing in the course of well construction, completion and repair in any section of a drill string as well as for absolute killing of a well if there is no tool in it. The preventers allow to perform pulling of the pipe strings with the socket-and-spigot joints. They are manufactured in compliance with technical specifications ТУ 3661-023-39048342-2006 in version K1 / K2 according to GOST 13862-90.
Design Features of Annular Blowout Preventers:
- cast bodies of high-resistant thermostrengthened alloyed steel;
- spherical seal reinforced with steel inserts;
- cover-to-body studding provides for easy replacement of a seal in the field conditions;
- compensating hydropneumatic accumulator is incorporated into the hydraulic control station;
- sealing rings of PTFE-based elastomer and special polymer ensure the long service life;
- heat chamber intended for seal working space heating is built into the body. Heating is performed by means of heat transfer of gaseous (steam)
or liquid (heated oil from the hydraulic control station with a heating module) heat-carrying agent;
- optional flange spools and cross-pieces may be delivered.
Technical Specification of Hydraulic Annular Preventers
Designation
Nominal bore, mm
Operating
