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    well control equipment Annular BOP for Blowout Prevention
    Well Control Equipment
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    well control equipment Annular BOP for Blowout Prevention

    > Designed and manufactured in accordance with API Spec 16A.

    > Rubber core stores large glue volume with low friction resistance during pressure switching, ensuring reliable sealing capability. 

    > Using hemispherical head, no stress concentration phenomenon when under pressure, casing stress evenly, easy to tear open outfit.

    >  Piston stroke is short, low height, and set the wear ring.

    >  Long-life sealing element provides positive seal after hundreds of tests to full working pressure.

    >  Strong, simple construction- only five major parts, which simplifies maintenance.

    > Sealing element design provides long stripping life.

    > High sulfate-resistant blowout preventer internal all parts contact well liquid surfacing high nickel base alloy, can achieve the highest levels of resistance to effect such as H2S and CO2. 

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      Brief Introduction
      Technical Specification

      Annular BOP is an important part of well control equipment. It is mainly used to control wellhead pressure in drilling, work over and oil test operations to effectively prevent blowout accidents and realize safe construction. It is usually used with ram BOP and also used alone.

      Annular blowout preventer is manipulated by hydraulic control system, Packing element is spherical or tapered type with massive storage volume, low operation pressure and excellent sealing function.

      Annular blowout preventer consists of body, upper housing, sealing element, dust-proof ring, and piston. It provides a rugged, reliable preventer and ease of service and widely used Offshore (subsea and surface) and onshore.

      Annular blowout preventer is compact, seal any size kellys, drill pipe, tool joints, drill collars, casing or wireline. Sphericals also provide positive pressure control for stripping drill pipe into and out of the hole.


      Annular blowout preventer is Manufactured in accordance with API Specification 16A, and NACE MR0175  Temperature T20, Standard nitrile packing element: 40°F to 170°F.

      Production standard: API Spec 16A

      Nominal Bore: 7 1/16”~30”

      Working Pressure: 500 ~ 5000psi

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