Maintenance Floating Dock Provided With Floater Guide System For Re-docking Therein AND Re-docking Method

摘要

A new concept floating dock for maintenance is disclosed, which anchors at sea and re-docks a floater producing crude oil or liquefied gas so that the floater is repaired without stopping the production. The floating dock for maintenance according to the present invention comprises: a pontoon deck (110) having a submarine coupling element entry groove (112) that a submarine coupling element enters, wherein the pontoon deck (1) moves below a floater (1) performing an original task while a submarine connecting element is lowered below a hull, an then floats on water so that the floater (1) is re-docked and repaired; sidewalls (130) extending upward from both left and right edges of the pontoon deck (110); a towing device (200) provided by installing a towing unit (250) capable of moving in a lateral direction, wherein the towing unit (250) is connected to a front end of the floater (1) that enters a top portion of the pontoon deck (110) with a towing cable (252) and then tows the same between the sidewalls (130); distance detection sensors (500) installed at multiple positions of an inner wall surface (130a) of the left and right sidewalls (130) in a longitudinal direction of the sidewalls (130) to face each other with a gap therebetween, and detecting a distance between a side surface of the re-docked floater (10) and the sidewalls (130); a re-docking controller (700) generating an alarm if a difference between sensing values applied from the left and right distance sensors (500) exceeds a reference value, and controlling an overall re-docking process of the floater (1); and a display (800) outputting the sensing values of the distance detection sensors (500) and the alarm on a screen under control of the re-docking controller (700).