F-35-70 blowout preventer unit has nominal I. O. Of 346.1mm and normal working pressure up to 70Mpa. The unit is composed of Annular Blowout Preventer (NWP 35 Mpa ), single RAM blowout preventer, dual-RAM preventer and cross joint (NWP70 Mpa ). The unit is designed and built for deep well drilling as well as offshore self-elevating drilling.
Main Technical Parameter FH35-35/70 annular blowout preventer Working diameter: 346.1mm Normal working pressure: 35Mpa Upper flange gasket ring: BX-160 Lower flange gasket ring: BX-159 Upper flange connecting bolt: 16-M42 * 3 Lower flange connecting bolt: 20-M48 * 3