First spar facility installed in the Gulf of Mexico

The last step in ballasting the Neptune spar involved spraying water into open hatches (Fig. 1). A dynamically positioned vessel lifted the 4,000 ton topsides onto the hull (Fig. 2). Last September saw the installation of the world's first spar production facility in the Gulf of Mexico. The Neptune structure is now moored in 1,930 ft of water in Viosca Knoll Block 826. Oryx Energy Co., operator of Neptune, expects production to start this month (OGJ, Sep. 23, 1996, pp. 35-36). Fig. 1 shows the 700-ft, 11,000-ton steel hull on location. To upright the hull, two ballasting lines from J. Ray McDermott's dynamically positioned vessel, DB50, were connected to the spar. For ...

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