A flow line structure (FLS) for interconnection of a satellite well to a subsea production system, externally locked to the guide-pipe of the template, includes a mechanical connector (62) with an internal profile (64) for locking to an STM (10); a main structure (68) consisting of beams; a cradle structure (78) located at the cantilevered end of said main structure (68); a terminal (80) located on said cradle structure (78) for connection of the lines originating from the satellite WCT with said FLS (60); a vertical flow line connection block; a plate (88) of hydraulic and electrical connectors attached to said main structure (68); and production piping (96) and annulus piping (98) for flow conduction between said terminal (80) and said vertical connection block.

This invention concerns a multiplexed electrohydraulic kind of control system consisting of ten undersea control modules, (24), arranged and installed one for each local Xmas tree (14) and satellite Xmas module (18). System links up with a stationary production system by means of two hydraulic umbilicals, (42), and one electric umbilical, (44), this latter through an electric distribution module, (26), while connection of jumper, (84) of undersea control module, (24), and to electric distribution module, (26) is done by means of a remotely controlled vehicle (R.O.V.), (30).

A satellite tree module (STM) (10) for flow control between a satellite well and a subsea production system, includes:- at the bottom, a connector (12) of hydraulically actuated internal-latch type; a lower structure (14) consisting of a central ring and arms with guide-funnels (16); an upper structure (18); a re-entry pole (20) integrated to the STM assembly (10) with an orientation key; a re-entry mandrel (22); a cap (24) for protection of the external profile of said re-entry mandrel (22) and its receptacles; a flow system arranged above said lower structure (14) and inside said upper structure (18) and consisting of a set of pipes and valves through which flow the fluids of the production/injection, production testing and gas-lift lines; a flow line terminal (26); and a control system responsible for the activation of the STM (10) functions during the operation phase. Another aspect of this invention relates to a flow line structure (FLS) (60) for interconnecting a satellite well to a subsea production system.

La présente invention concerne une installation et une méthode permettant d'exploiter des gisements pétroliers secondaires dont les capacités individuelles de production sont insuffisantes pour justifier de l'investissement dans les dispositifs classiques d'exploitation pétrolière.

• L'installation selon l'invention comporte en combinaison avec une plate-forme principale (8) équipée des moyens de production habituels (9), un support flottant (3) munie d'un système de pompage permettant le transfert des effluents pétroliers, des moyens d'ancrage (2) connectant ledit support flottant au fond de la mer, de premiers moyens de transfert (6) des effluents entre lesdits gisements et ledit support flottant, et des seconds moyens de transfert (7) des effluents entre ledit support flottant et ladite plate-forme principale, lesdits seconds moyens de transfert reposant sur le fond marin.
• La méthode selon l'invention se caractérise en ce que l'on utilise les capacités de production disponibles de la plate-forme principale pour le traitement des gisements secondaires, les effluents étant remontés depuis le gisement jusqu'au support flottant à l'aide d'un système de pompage et à l'aide de premiers moyens de transfert (6), avant d'être envoyé vers la plate-forme principale à l'aide des seconds moyens de transfert (7) sans séparation de leurs constituants.
• Application à l'exploitation de gisements pétroliers secondaires.

A casing guide apparatus includes a subsea well template 12 having a well opening (44) defined therein, and a cylindrical well casing (32) received through the well opening. A casing guide bushing (68) is operably associated with the template (12) and the casing (32) for permitting relative vertical movementt between the template and the casing and for preventing relative lateral movement between the template and the casing at the well opening.

A flexible riser l0 has a lower connector ll which is moved laterally over the seabed by a pull-in sled 7 under a mid-water support buoy 3 to connect it to a connection point l7 on subsea equipment l. The riser l0 is attached at a point part way along its length to buoy 3. This is done at one side of the buoy prior to construction vessel l3 laying the riser over the buoy and connecting the upper connector 24 to a production vessel 2 positioned over the subsea equipment. Attachment is done by guiding the riser pipe into a channel 36, a projection 20 on the riser engaging the channel against lowering of the pipe. An upper connector of the riser may include a single pivotal arm and a single offset guide post to maintain its orientation while it is being pulled into engagement with a mating part on the production vessel.

Apparatus for connecting a flowline bundle to a plurality of further flowlines comprises a base (10) on to which a hub assembly (16) at one end of the flowline bundle can be pulled and secured so that individual connector hubs (65a-65d) on the hub assembly (16) can be accurately aligned with connectors (21a-21d) which are connected respectively to the further flowlines and subsequently sealed thereto.

A technique facilitates integration of a well system asset, e.g. a subsea asset 26, with a pressure protection system (PPS) 50 to prevent over-pressurization on a downstream side of the well system asset. The PPS comprises a barrier structure 64 which may be automatically actuated upon sensing the over-pressurization to block further flow through the well system asset 26. By combining the PPS 50 and the asset 26 into an integrated structure, certain internal components and functionality may be shared. The integrated structure provides a substantially smaller footprint on, for example, the seabed while also providing a more cost efficient structure to construct and deploy.

Extender jumper systems and methods including an extender jumper system having an extender jumper assembly with a flowline and first and second connectors positioned at first and second ends of the flowline, and a support assembly configured to couple the extender jumper assembly to a support structure within a subsea field and to support the second connector to facilitate attachment between the second connector and a corresponding connector of another extender jumper or a jumper.

An underwater hydrocarbon processing facility (1) has at least one fluid processing clusters (3a, 3b) provided with modules (4, 5, 6, 7) having, each, one fluid processing device and a plurality of first connection members (9) for defining the inlet and the outlet of the process fluids; and an interconnection unit (8) having a plurality of second connection members (10) defining inlet and outlet for the process fluids and configured to be operatively coupled to corresponding first connection members (9) for operatively interconnecting the modules (4, 5, 6, 7).