B - Operations – Transporting – 63 – B
Patent
B - Operations, Transporting
63
B
61/12.1, 114/58.
B63B 35/44 (2006.01) B63B 21/50 (2006.01)
Patent
CA 1045472
Abstract of the Disclosure An improved floating structure suitable for use as a floating drilling platform having a tension mooring system of a plurality of anchors each with a depending skirt on its lower side, control passageways through the anchor to the area defined by the skirt, ballasting and deballasting means, and a plurality of cable connecting each anchor to the floating platform, tension monitoring and control devices associated with each cable to assure substantial equalization of tension in the cables, the anchor locking system to secure the anchors to the floating platform, the anchors having a total buoyancy to support the entire weight of the structure so that in transit a minimum structure is below the water, and a plurality of thrusters controlled to assist in accurate station keeping of the floating platform and in movements of the floating structure from and to moored location. The method of recovering the anchors which are connected to the floating platform having at least three legs by cables or chains which includes the steps of bal- lasting the floating platform to lower it in the water, tightening all of the cables or chains to a uniform tension, deballasting one of the legs of the platform to increase the tension in the connections to one of the anchors and thereby pull the anchor free of the bottom, similarly deballasting the platform to pull the other anchors free of the bottom, and lifting the anchors into engagement with the lower end of its platform leg.
223898
Bozeman James D.
Ray Donald R.
LandOfFree
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