Core tool around which resin-impregnated reinforcement is wound to form pipes, fittings and structural shell shapes.

Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards


Component(s) of a packer that contain(s) the end connections and provide(s) a conduit through the packer.

Source: API SPEC 11D1, Packers and Bridge Plugs, Upstream Segment, Second Edition, July 2009. Global Standards

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