InterMoor claims mooring depth record offshore Brazil

Projects and Operations - April 20, 2012

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As part of a one-year project to provide mooring and positioning support operations for Shell do Brasil, InterMoor do Brasil Ltda (InterMoor) recently beat the depth record for conventional mooring offshore Brazil with a water depth of 2,027m.

The project involves the mobile offshore drilling unit (MODU) Noble Clyde Boudreaux and will run until the middle of 2012. Operations focus on the Campos and Santos basins, but could be in any location off Brazil’s southeast coast in water depths ranging from 600-2,300m.

Andre Oliveira, project manager, InterMoor said: “We are committed to delivering safe, efficient and cost-effective mooring operations in support of this drilling campaign. There are challenges, so we have worked with Shell to plan everything in minute detail. This planning is essential if we are to continually break new boundaries such as the previous water depth record for conventional mooring offshore Brazil at 2,015m (wwell depth) and two of the eight anchors moored at 2,027m.”

Intermoor's contract covers the provision of engineering mooring analysis reports and conventional mooring. InterMoor has designed mooring patterns for the Noble Clyde Boudreaux at every drilling rig location. This involves a mix of open-water exploration work and mooring around subsea assets.

InterMoor assisted Shell in defining the anchor-handling vessel specifications for the
programme based on the final mooring system design and supplies mooring coordinators, engineers and survey personnel on the rig and anchor-handling vessels to supervise and direct mooring system deployment, retrieval and connection to the rig.

Because of the water depths and the high loads, the anchor-handling vessels are high power with bollard pulls of 265 tonnes and are fitted with 3,000m work wires.

The planning also considered the availability of mooring element spares as a critical measure to prevent unexpected major delays to operations.

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