1) Annular Totating Preventer 7 1/16"-5000psi
2) Preventer According to: API 16A
3) Preventer Model:shaffer
4) H2S resistence

Preventer  Model:FHZ18-35

Main technical parameters:

Bore:180mm

Maximum wellhead pressure (static):35MPa

Maximum wellhead pressure (dynamic):21MPa

Plastic core:can be used as spherical plastic core for HF18-35 annular blowout preventer.

Dimensions:Φ950×936(mm)

Design ambient temeterature:-29oC~121oC

Preventer  shaft material:Fit for H2S service

Design principle : API 16A

Rotating blowout preventer is installed in the top of wellhead blowout preventer unit , namely removing overflow resisting pipes and replacing them with rotating blowout preventer installed . Rotating blowout preventer can seal drill pipe and Kelly bars , allow drilling tool rotating under limited wellhead pressure for pressurized drilling operations.