Tdw Delaware, Inc.

Tdw Offshore Services As

Kurt Steinsvik

Cody A Parsley

Khanh Van Nguyen

Rafal Sulwinski

Pipeline isolation tool for sealing extrusion gaps of up to about 20% or greater includes a pair of fenced barriers () having overlapping segments () for restraining a seal (). The segments expand to a pipe wall before the seal to prevent transition of seal medium over the segments and form a support wall for the seal. The support wall may include a protection ring (). Springs () surround each fenced barrier for returning the support system to a relaxed position. Inner rings () are provided on sealing element facing surfaces () of the fenced barrier for supporting the segments. The inner rings define a smooth inner guiding surface () for the seal. The guiding surface is tilted inwardly towards the seal for resisting the sealing element during expansion and for preventing an inside diameter of the seal from expanding outwardly when compressed.

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Sandnes, Norway

Kurt Steinsvik