AN APPARATUS FOR VENTING AN ANNULAR SPACE BETWEEN A LINER AND A PIPELINE OF A SUBSEA RISER
    2.
    发明公开
    AN APPARATUS FOR VENTING AN ANNULAR SPACE BETWEEN A LINER AND A PIPELINE OF A SUBSEA RISER 有权
    装置用于空气的环形空间之间的班轮和水下提升管管道

    公开(公告)号:EP2129861A1

    公开(公告)日:2009-12-09

    申请号:EP08709345.6

    申请日:2008-02-08

    申请人: Technip France SA

    IPC分类号: E21B17/01 E21B43/01

    摘要: An apparatus for venting an annular space between a liner and a pipeline of a subsea riser (2) for conveying hydrocarbons, said apparatus comprising permeate recovery means for recovering permeate passing through the liner into said annular space. Preferably said permeate recovery means comprises a first- vent port (10) provided in a wall of the pipeline at or adjacent a lower region of the pipeline and communicating with a permeate recovery line (11) defining a flow path between said annular space and a permeate collection vessel (12). Preferably a one-way valve is associated with said permeate recovery line for preventing flow from said permeate recovery line (11) into said annular space.