Marine riser isolation tool

摘要

The present invention relates to a marine riser isolation tool in particular to an autonomous marine riser isolation tool having a robotic plug installation device that is adapted for positioning a pipeline isolation plug in a vertical pipe such as a marine riser, resulting in sealing of the marine riser.;In one aspect of the invention, there is provided an autonomous plug installation device that is suitable for installing an isolation tool in a marine riser, the plug installation device comprising;
a hydraulic ram system comprising a plurality of pipe engaging means positioned along an exterior surface of the hydraulic ram system, the pipe engaging means being operable by the hydraulic ram system to be movable between a retracted and extended configuration such that the pipe engaging means are engagable with the interior surface of the marine riser;a control system in communication with the hydraulic ram system to control the movement of the pipe engaging means such that the robotic unit locates the pipe isolation tool at a predetermined location in the vertical pipe; and an autonomous ELF communications system. A method of sealing a leaking marine riser using the marine riser isolation tool is also disclosed.

主权项

1. A marine riser isolation tool comprising an autonomous plug installation device that is adapted for locating an autonomous pipeline isolation tool in an opening of a marine riser pipe connected to a well, the autonomous plug installation device comprising:
a hydraulic ram system comprising a plurality of pipeline engaging means positioned along an exterior surface of the hydraulic ram system, the pipeline engaging means being operable by the hydraulic ram system to be movable between a retracted and extended configuration such that the pipeline engaging means are engagable with an interior surface of the marine riser pipe; a longitudinally mounted telescopic master; a secondary ram that extends and retracts to move the plug installation device in the marine pipe riser; and a control system in communication with the hydraulic ram system to control the movement of the pipeline engaging means such that the plug installation device locates the pipeline isolation tool at a predetermined location in the marine riser pipe; and a communications system characterised in that the marine riser isolation tool further comprises a guide means, the autonomous pipeline isolation tool and autonomous plug installation device being removably mountable onto the guide means; the guide means further comprising securing means for securing the guide means to the marine riser pipe; and a buoyancy device whereby the buoyancy device is positioned at one end of the guide means and the securing means are attached to another end of the guide means remote from the buoyancy device.