METHOD AND A SYSTEM FOR CONTROLLING MOVEMENTS OF A FREE-HANGING TUBULAR
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United States of America Patent
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Issued Date -
May 9, 2013
app pub date -
Jun 28, 2011
filing date -
Jun 30, 2010
priority date (Note) -
Abandoned
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Abstract
An apparatus for controlling movements of a free-hanging tubular suspended via at least a connector element by at least one compensator member connected to a buoyant vessel, the tubular extending into a body of water below the vessel. The apparatus includes a motion sensing device configured to sense movements of the compensator member and thus that of the vessel, and a position indicator device configured to sense the position of the connector element, and thus that of an upper region of the tubular, with respect to the compensator member. The apparatus further includes a data processor configured to determine one or more parameters regarding the movement between the vessel and the upper region of the tubular; and an adjusting device configured to control at least the stiffness and dampening of the compensator member; whereby the axial loads which are transferred between the compensator and the tubular may be controlled.
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