Huisman of the Netherlands has won a contract to deliver a well intervention system to Helix Energy Solutions Group for the latter’s Q7000 newbuild semisubmersible vessel.
The system, based on Huisman’s Multi Purpose Tower (MPT) design, will be built by the company’s production facility in China, it said. The fully integrated 800mt well intervention system will be capable of handling the intervention stack, the high pressure riser and other components.
The MPT has the same functionality as a normal derrick, says Huisman, but offers improved accessibility to the well centre, which allows for new improved handling procedures. The superior accessibility to the well centre and the small footprint of the MPT are ideally suited for well intervention and subsea installation services, it added. Subsea equipment can be skidded into the well center from three sides, offering enhanced flexibility.
The MPT’s active heave compensation hoist system assists landing equipment on the seabed, while the passive heave compensation system provides a safe and redundant means to supply top tension to the risers. A guide trolley, travelling the entire length of the tower, guides the subsea modules during lifting operations.
The system also features multiple transfer hatches that can be used to move equipment into the well center, and a skiddable work floor covering the moonpool flush with main deck. The skiddable work floor allows large subsea modules to be deployed, without the need for a raised work floor, according to Huisman.
In addition to the system, Huisman will also supply a 150mt knuckle boom crane and a 160mt pedestal mounted crane. The company has previously supplied equipment to Helix for the latter’s Q4000, Well Enhancer and Q5000 vessels.
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