Annular BOP

API Spec 16A

Annular BOP has two styles of packing element structure, spherical style and taper style. The spherical annular BOP consists of 5 main components including body, upper housing, piston, spherical packing element and dust-proof ring. The taper annular BOP consists of 7 main components including body, upper housing, wear-plate, piston, taper packing element, dust-proof ring and supporting cylinder. The simple and compact design guarantees easy maintenance and reliability. The design with minimum moving parts provides excellent repeatability in positive sealing and the well pressure also assists sealing.

Specification of Annular BOPs

Note: the bore size marked with "*" can be manufactured with 186mm according to onsite requirements in order to meet 350 wellhead pipes hanging.
FH--spherical annular BOP; FHZ--taper annular BOP