Petroleo Brasileiro S.a. - Petrobras

Petróbras Brasileiro S. A.—petrobras

Flavio Barroso De Mello

Bruno Pinho Dos Reis

Claudio Violante Ferreira

Vinicius Gasparetto

Ricardo Wagner Capllonch

Jose Mauricio Teixeira Da Gama Lima

Ricardo Pires Mendes Peixoto

Jose Abreu E Silva Filho

Pedro Luiz Ferreira Mendes

The present invention pertains to the technical field of oil and gas; more specifically to the field of risers and flow line connections to offshore structures, and describes a pull-in cable deflector system in keelhauling of rigid risers comprising: a deflector assembly including a deflector device housed in a structural block, a sliding structure, at least two rails. The deflector device installed in the structural block is moved through a sliding structure on rails installed forward of the URB to the different pull-in or pull-out positions in keelhauling of rigid risers. The structural block is slidably mounted on a base frame by means of a system of sliding supports to perform a first adjustment of the transverse distance from the deflector device to the URB. The deflector device is then rotated around the vertical line depending on the azimuth of the support tube. A second adjustment of the transverse distance of the deflector device is performed during the pull-in operation.

Pull-in system and method of keelhauling rigid risers using a deflector device and double layer support tube

In order to achieve the above-described objectives, the present invention provides an adapter tool for coupling a bend stiffener with diverless bell mouth (DLBM) interface in a bell mouth with BSN900E-type interface. The adapter tool is capable of maintaining interchangeability and flexibility between designs or design phases, even if different bell mouth models are used. A tool characterized in that it comprises an adapter split ring () that, in the upper part, has a geometry compatible with the dovetail profile of the BSN900E model helmet and, in the lower part, has a geometry compatible with the seating profile of the DLBM helmet (). The present invention leads to two assembly methods, which guarantee the operational safety of the adapter assembly, namely: a method where it is only done by screws located in the split ring; and another, where the assembly includes, in addition to the split ring, an assembly with the support ring and rods.

Adapter tool for coupling a bend stiffener with diverless bell mouth interface (DLBM) into a BSN900E bell mouth and assembly method

In order to achieve the objects described above, the present invention provides an adapter tool for coupling a ben stiffener with interface for bell mouths of models with connection type BSN900E in a diverless bell mouth (BSDL), consisting of a adapter split ring (), guide pin holes (C), fastener eyes (D), and through holes (E). The adapter tool is capable of keeping interchangeability and flexibility between projects or project phases, even if different bellmouth models are used. The interconnection method between the helmet () and the adapter split ring () can be done by direct attachment by bolt, or by attachment by ring/rod support. Both interconnections can be made on board a flexible line launching vessel, in the case of reusing lines from other projects, or at the factory, in the case of sharing new flexible lines.

Adapter tool for coupling a bend stiffener with interface for bell mouths of models with BSN900E type connection in a diverless bell mouth (BSDL) and interconnection methods

The present invention addresses to a system for supporting the tension load of the riser, this component with the primary function of supporting the risers, where the riser support mechanism is an integral part of the upper cone, thus eliminating the need to install slips by the shallow dive, and, also avoiding that the locking mechanism is an integral part of the Top Termination of the Riser (L). There is a minimal number of moving parts, which favors the maintainability of the system. In addition, if maintenance is required, the size and weight of the components are compatible with diving operations. For pull-in operations, it is anticipated that the slips will return to their working position only by the action of the force of gravity. In the case of pull-out, the concept of automated slip retraction mechanism was developed. A new Top Termination of the Riser (TTR) (L) geometry is also proposed, aiming at its simplification, in which, in addition to considering the locking mechanism as an integral part of the upper cone of the Support Pipe, there is the elimination of moving components for stabilization of its side movement (a function formerly performed by the locking ring or by the gap compensator).

Support for risers and method for coupling and uncoupling

The present invention provides a system for coupling between a bend stiffener () and a bell month () comprising a plurality of locking mechanisms (), wherein each locking mechanism () is secured externally to the bell mouth () and comprises a movable lug () positioned such as to slope downwards, in which the lug () accesses the interior of the bell mouth () and is actuated by an elastic element () designed to exert pressure on the lug () in the direction of the interior of the bell mouth ().

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Rio de Janeiro, Brazil

Flavio Barroso De Mello