ANNULAR BOP

The design and manufacture of Annular BOP is according to API Spec 16A standard.

  • Packing element is spherical or tapered type with massive storage volume, low operation pressure and excellent sealing function
  • Bonnet is hemispherical-shaped, so there is no stress concentration on bonnet whenever bearing the pressure. so the pressure is evenly distributed; convenient for disassembly and assembly (except FHZ5414)
  • Piston is set in low position to have a shorter moving distance; Use wear ring on piston Lip type seal rings are used to realize long service life

Claw Plate Connection Annular BOP

Wedge Block Connection Annular BOP

Flange Connection Annular BOP

Annular BOP Classification

Drift diameter (in)
Operating pressure (psi) 7 1/16 11 13 5/8 20 3/4 21 1/4
2000 Flange connection (bolted) Flange connection (bolted) Flange connection (bolted) Conical
3000 Flange connection (bolted) Flange connection (bolted) Flange connection (bolted) Conical
3000 Flange connection (bolted) Flange connection (bolted) Flange connection (bolted)
3000 Flange connection (bolted) Wedge block connection Wedge block connection