Annular Blowout Preventer

The annular preventer (also called bag type, spherical, or universal preventer) is the most versatile piece of equipment on the BOP stack since it can close around the casing, drill pipe, drill collars, wireline, and even close an open hole. The rubber packing elements of the annular preventers, which allow this flexibility, are also subject to wear and abuse. Treated properly, the packing unit of the annular preventer has a long, reliable life span, but it can be destroyed in a very short time or very few closing cycles by improper use. Here, we will cover all annular blowout preventer BOP types, such as Cameron, Hydril & Shaffer BOP types that are used in drilling rigs.

The design and manufacture of Annular BOP is according to API 16A standard.Annular blowout preventer is manipulated by hydrauilc control system.Packing element is spherical or tapered type with massive storage volume,low operation pressure and excellent sealing function.

The following factors influence the life span of annular preventers:

• The closing pressure, as regulated through the control system, should be as low as practically possible to maximize the life of the packing unit.
• Testing the annular preventer under high test pressures significantly shortens the life of the packing unit.
• Closing the annular preventer without a pipe in the hole will shorten the life of the packing unit, especially when high closing pressures are required to achieve this.
• Motion reversal is hard on the packing unit, so the pipe should be moved as far as possible in one direction before reversing the direction (i.e., long strokes).
• Spare packing units should be stored in a dark, cool room.

EGK type Annular BOP Screwed Head

EGK type Annular BOP Latched Head

EB type Annular BOP

EL type Annular BOP

EW type Annular BOP

Sealing Element EB type Annular BOP

Steel Segment Reinforce Sealing Elemen.

Sealing Element EL type Annular BOP

Sealing Element EW type Annular BOP