Tdw Delaware, Inc.

Tdw Offshore Services As

Khanh Van Nguyen

Hallgeir Foss Alsvik

Cody A Parsley

Kurt Steinsvik

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.

Pipeline isolation tool with seal having adaptable mechanical support structure

A mechanical lock unit with a shaft lock assembly and method of achieving a self-lock mode for, e.g., hydraulically activated isolation plug module. The shaft lock assembly includes a teeth-form ring that surrounds a shaft. The teeth-form ring defines a plurality of teeth. A teeth-form split gripper assembly is positioned to surround the teeth-form ring. The teeth-form split gripper assembly has at least a first teeth-form split gripper and a second teeth-form split gripper with a spring therebetween for biasing the first teeth-form split gripper away from said second teeth-form split gripper. The first teeth-form split gripper and the second teeth form split gripper having an inner surface that defines a plurality of teeth for cooperative engagement with the plurality of teeth of the teeth-form ring.

Growing community of inventors

Stavanger, Norway

Khanh Van Nguyen