1. Annular Blowout Preventer (Spherical BOP) is designed and fabricated in accordance with API 16A.
Structure Features 1) Packing element is spherical or tapered type with massive storage volume, low operation pressure and excellent sealing function; 2) Bonnet is hemispherical-shaped, so there is no stress concentration on bonnet whenever bearing the pressure. 3) Bonnet and body are connected by a wedge block, so the pressure is evenly distributed; 4) Packing element is interchangeable with similar overseas products; 5) Use observation hole to check the life span of the packing element; 6) Piston is set in low position to have a shorter moving distance; Use wear ring on piston.
2. Blowout Preventer Stack Blowout Preventer (API 16A BOP) Stacks are the main wellhead pressure control equipment for oil and gas drilling, no matter onshore or offshore drilling. Blowout preventer stack consists of annular blowout preventer, single RAM blowout preventer, double RAM blowout preventer and drilling spool. Blowout preventer stacks designed and fabricated in accordance with API 16A are similar to Shaffer's BOP or Cameron's BOP.