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AssigneePetroleo Brasileiro S.A. - Petrobras
InventorsBruno Pinho Dos Reis, Jorge Gomes de Melo Medeiros, Gilnei Reckziegel, Roberto Pereira Ferreira, Raphael Moreira De Brito, Claudio Violante Ferreira, Flavio Barroso De Mello
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A riser support is disclosed that is completely integrated into the Riser Balcony of a Floating Production Storage and Offloading (FPSO), which serves both rigid and flexible risers. This riser support presents a versatility that allows the use of flexible or rigid risers with some variation in their inner diameters and the interconnection can be carried out on the port or starboard side. The Diverless Unified Support Tube (DUST) is characterized in that it comprises an upper cone, a guide tube and a centralizer, responsible for centralizing the hang-off adapter and locking the bend stiffener. The application of DUST can promote a reduction in the length of rigid pipes in the subsea arrangement by allowing keelhauling interconnections, in addition to enabling the optimization of the rigid riser interconnection operation and accelerating the Ramp-up of new SPUS.
A DIVERLESS UNIFIED SUPPORT TUBE (DUST), comprising an upper cone, a guide tube, and a centralizer, the upper cone being automated and of a diverless style, the centralizer includes Lateral Locking Modules (LLM) and a bend stiffener locking system, the LLM consists of a conical mandrel that, when advancing towards a center of the DUST, compresses four shoes against an outer ring, resulting in locking of the LLM in any position on the approach course, regardless of hydraulic pressure.
A DIVERLESS UNIFIED SUPPORT TUBE (DUST), comprising an upper cone, a guide tube, wedges responsible for riser traction support, and a centralizer, the upper cone being automated and of a diverless style, wherein a top termination of a riser makes contact with the wedges in a lower part of the top termination, said wedges sliding through the upper cone in an upward movement guided by rods, returning to a working position by the effect of gravity and the force of springs.
A DIVERLESS UNIFIED SUPPORT TUBE (DUST), comprising an upper cone, a guide tube, wedges responsible for riser traction support and a centralizer, the upper cone being automated and of a diverless style, wherein a top termination of a riser makes contact with the wedges in a lower part of the top termination, and wherein a cam holder crown is rotated on an axis coinciding with the upper cone for pull-out operation.
A DIVERLESS UNIFIED SUPPORT TUBE (DUST), comprising an upper cone, a guide tube, wedges responsible for riser traction support and a centralizer, the upper cone being automated and of a diverless style, wherein a top termination of a riser makes contact with the wedges in a lower part of the top termination, and wherein an automatic sliding mechanism of the wedges can replace a primary actuation in an automatic mechanism pull-in of a hydraulic system and ensure that the wedges are previously retracted, avoiding any contact with the top termination of the riser during the pull-in operation.
Dependencies are inferred from the claim text.