Abstract: A satellite tree module (STM) (10) for controlling flow between a satellite flow and a subsea production system includes at the bottom of the STM a connector (12) of an internal-latch, hydraulically operated type. A lower structure (14) consists of a central ring and projecting arms terminating in guide funnels. An upper structure (18) supports a reentry pole (20) integrated to the STM assembly (10) via an orientation key, a reentry mandrel (22) and a cap (24) for protection of the external profile of the reentry mandrel (22) and its receptacles. A flow system is arranged above the lower structure (14) and inside the upper structure (18). The flow system consists of a set of pipes and valves through which production/injection, production testing and lift-gas fluids flow. A flow line terminal (26) and a control system responsible for the activation of the STM (10) components during the operational phase are amounted to one of the upper and lower structures.

Abstract: This invention refers to a wet Christmas tree (20) utilized particularly in subsea production systems, including at the bottom a connector (22) for purposes of locking to the wellhead, a guide structure (24) consisting of a central ring attached to said connector (22), supporting arms (26) and guide funnels (28), a valve block (30), a reentry mandrel (32), gate-type lateral valves (46, 48, 50, 52) with metal/metal sealing and hydraulic driving with spring-type return flow lines with loops (54, 56, 58) and piping for the crossover line, hydraulically adjustable chokes (60, 62), a flow line terminal (36), a reentry pole (42) and a control system.

Abstract: A subsea system for oil or gas production and water injection operates without divers' assistance and with guide-cables and includes a template (50) equipped with ten drilling mouths (53) arranged in two rows of five. Each drill mouth (53) has a guidepipe (54). The upper extremity of the guide-pipe presents an external section for locking purposes. A guide-base (55) is provided with four posts (56) removable by a ROV. A central space is provided in the template for the setting of a manifold (60) through four posts (63) to guide the installation and devices which ensure the final positioning of the manifold (6) within established tolerances. Bases of export-line terminals (64) are located in one of the extremities of the template (50) Each base (64) is provided with two guide-posts removable by a ROV, in addition to reaction posts (66) which orient the lowering of the pulling and connection tools and transfer the stresses to the structure of the template. Receptacles (67) lock the export-line terminals.

Abstract: A subsea connection system includes a rigid vertical main connector (23) and an active (mobile) lateral connector (24) coupled to a subsea module (20) for connection, respectively, to a main mandrel (25) and to a lateral mandrel (26) rigidly fixed to the structures (27, 28) set at the seabottom. The active lateral connector (24) utilized in this system is provided internally with a locking and sealing set which is supported by pins (39) held in the orifices (40) of an intermediate jacket (41) which, in turn, is supported by pins (45) circumferentially offset at 90.degree. in relation to the orifices (40).