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    AI Overview
    An annular packing element (spherical type) is a critical well-control component in blowout preventers (BOPs), designed to create a secure, high-pressure seal around drill pipe, casing, tubing, or to seal the open hole. These elements feature a distinct spherical shape that optimizes pressure distribution, ensures superior conformability around variable tubulars, and often allows for a 15–20% shorter, more compact BOP design. 
    Key Features and Benefits 
    • Optimal Sealing: The spherical design provides superior conformability for reliable sealing around irregular shapes (drill collars, tool joints) and in high-pressure environments.
    • Versatility: Can close on various sizes and shapes of pipe and wireline, as well as achieve a Complete Shutoff (CSO) of the bore.
    • Reduced Size: Often shorter than standard annular preventers, making them ideal for space-constrained, deepwater, or subsea environments.
    • Durable Materials: Typically constructed from elastomers like Nitrile (NBR) or Hydrogenated Nitrile (HNBR) for high abrasion and chemical resistance against oil, gas, and drilling fluids.
    • Improved Life Span: Engineered for high-pressure well control, with some designs lasting up to 30 or more complete shutoffs. 
    Common Applications 
    • Drilling/Workover: Used during snubbing and drilling, particularly in operations requiring robust sealing against unpredictable pressure spikes.
    • Stripping: Ideal for stripping tubing, drill pipe, and wireline. 
    Compatible BOP Types
    Spherical packing elements are used with specialized annular BOPs, including those compatible with industry standards from manufacturers like Shaffer, Hydril, and Cameron. They are often manufactured to meet API 16A standards. 
    Material Composition 
    • NBR (Nitrile Rubber): Offers good mechanical properties and high wear resistance for standard applications.
    • HNBR (Hydrogenated Nitrile): Provides superior resistance to high temperatures, sour gas (
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      ), and abrasion.       
    Note: The storage time for these rubber packing elements can be up to 5 years under proper, controlled conditions (shaded, cool, low humidity). 
    • Annular Packing Element Spherical Type
      Description. The annular packing element, spherical type, designed for drilling Blowout Preventers (BOPs), serves a critical funct...
      Tianjin Geostar Petroleum Equipment Co., Ltd
    • Annular & Spherical BOP | Blow Out Preventers
      Sphericals are generally 15 to 20% shorter than comparable annular preventers; this is a big advantage when installation space is ...
      World Petroleum Supply
    • Annular BOP Packing Elements - Packing Element for Shaffer Spherical & Hydril GK BOPs | Meyer Fabritech
      The Shaffer 150847 is a packing element product number for HBOP packing elements. HBOP packing elements are designed for use with ...
      Meyer Fabritech
    Show all
    • Annular Packing Element Spherical Type
      Description. The annular packing element, spherical type, designed for drilling Blowout Preventers (BOPs), serves a critical funct...
      Tianjin Geostar Petroleum Equipment Co., Ltd
    • Annular & Spherical BOP | Blow Out Preventers
      Sphericals are generally 15 to 20% shorter than comparable annular preventers; this is a big advantage when installation space is ...
      World Petroleum Supply
    • Annular BOP Packing Elements - Packing Element for Shaffer Spherical & Hydril GK BOPs | Meyer Fabritech
      The Shaffer 150847 is a packing element product number for HBOP packing elements. HBOP packing elements are designed for use with ...
      Meyer Fabritech
    • SPHERICAL ANNULAR ISA™ BOP
      The Integrated Model ISA™ Spherical Annular Type Blowout Preventer is a hydraulic operated device designed for well pressure contr...
      INTEGRATED® Equipment, Inc
    • High Quality Annular Packing Element for Shaffer/ Hydril Annular Bop
      ACRYLONITRILE BUTADIENE POLYMER (ASTM D1418 Designation - NBR) • Nitrile rubber (NBR) is the general term for acrylonitrile butadi...
      Made-in-China.com
    • Annular BOP Preventer | Hydril, Shaffer & Cameron Guide
      Sep 27, 2021 — The annular preventer (also called bag type, spherical, or universal preventer) is the most versatile piece of equipment on the BO...
      Drilling Manual
    • Shaffer Type Annular BOP packing element - PWCE
      -The storage time of the packing elements can be increased to 5 years, under the shading conditions, the temperature and humidity ...
      www.pwceco.com
    • On Sale Spherical Annular BOP Packing Element High ...
      Industry Applications of Spherical Annular BOP Packing Elements. Spherical annular blowout preventer (BOP) packing elements are cr...
      Alibaba.com·
      0:24
    • Packing Element API 16A Annular Bop Spherical ...
      Packing Element API 16A Annular Bop Spherical Packing Element for Hydril, Shenkai Bop. - Bop and Blowout Preventer.
      Made-in-China.com
    • Hydril Annular Packing Elements - HMH
      HMH's Hydril Annulars are designed to drill in hotter, higher pressure, and more sour environments. They use envelope pushing elas...
      hmhw.com
    • 21” ID Annular Element Tested to 30 Complete Shutoffs
      Mar 16, 2018 — 21” ID Annular Element Tested to 30 Complete Shutoffs
      YouTube·Parker Lord
      2m
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