A method and a system for providing fluid communication between a floating vessel and an installation, wherein the method connects a guiding line to a male stab arranged at an end portion of a fluid transfer hose. The guiding line is operatively connected to a pulling device, such as a winch, forming part of a fluid transfer unit having a female receptacle. The guiding line runs through the female receptacle, and a portion of the guiding line is pulled through the female receptacle until the male stab connects to the female receptacle.

A method of positioning an end of a pipeline on a subsea structure includes the steps of: (a) providing a channel on the subsea structure, the channel having an open end adjacent to a receptacle on the subsea structure, (b) providing a pipeline, (c) attaching a connector to an end of the pipeline, (d) laying the end of the pipeline with the connector attached into the channel, and (e) pulling the pipeline end along the channel such that the connector exits the open end of the channel and is received by the receptacle. A channel is used in the method and a subsea structure is used wherein the channel is provided on the upper surface of the subsea structure.

A method of connecting a conduit to a subsea structure is provided. In the disclosed method, a tensioning member is provided on the conduit and attached to the conduit at two locations proximate a first end of the conduit. The tensioning member is used to maintain a curvature formed in the conduit between the two locations e.g. by deflecting a portion of the conduit. A first end of the conduit is engaged with a guide assembly provided adjacent to the subsea structure, and tension in the tensioning member is released to adjust the axial position of the first end of the conduit to enable direct connection between the conduit and the subsea structure. A method of disconnecting a conduit from a subsea structure, and a system for connecting a conduit to a subsea structure are also provided.

A flexible deployment system is used to deploy subsea/downhole well equipment or modules from a multi-purpose vessel without requiring a moon pool and a derrick or tower. The deployment system may include the vessel and a deployment frame disposed on the vessel. The deployment frame includes a protruding section extending as a cantilever beyond an external edge of the vessel, and the protruding section includes an aperture formed therein to facilitate construction of the well equipment or modules through the protruding section. The deployment system also includes an actuation assembly coupled to the protruding section to selectively transition the protruding section to a collapsed, split, or retracted orientation out of a deployment path of the well equipment or modules. The system allows for controlled deployment of well equipment or modules including at least a string of downhole tools or tubulars coupled end to end from the side of the vessel in a single trip.

An offshore methane hydrate production assembly (1), having a tubing (41) extending into a subsea well (5) that extends down to a methane hydrate formation (7) below the seabed (3). A submersible pump (45) is arranged in the tubing (41). A methane conduit (35,35) extends down from a surface installation (49). A well control package (15) landed on a wellhead (13) is positioned at the upper end of the subsea well (5). Moreover, an emergency disconnection package (25) is arranged between the methane conduit (35,135) and the well control package (15). The tubing (41) is suspended from the well control package (15). Other aspects of the invention are also disclosed.

An end connection assembly (200) for pull-in and coupling of a flexible tubular pipe to an inboard hub of a subsea structure using a tie-in tool, which flexible tubular 234 pipe comprises a plurality of superposed flexible layers (210, 214, 218) of metal materials and plastics materials, wherein the end connection assembly comprises an end fitting (202) which is connected to an end section (204) of the flexible tubular pipe in a sealed manner forming a termination of the flexible tubular pipe in which at least one layer of said plurality of flexible layers is anchored; an engagement surface (226a, 226b) for interacting with engagement means of the tie-in tool; and a collet connector assembly allowing releasable coupling of the end connection assembly to the inboard hub. The engagement surface is arranged in the end fitting radially outside of and circumferentially enclosing the at least one flexible layer.

A method of connecting a conduit to a subsea structure is provided. In the disclosed method, a tensioning member is provided on the conduit and attached to the conduit at two locations proximate a first end of the conduit. The tensioning member is used to maintain a curvature formed in the conduit between the two locations e.g. by deflecting a portion of the conduit. A first end of the conduit is engaged with a guide assembly provided adjacent to the subsea structure, and tension in the tensioning member is released to adjust the axial position of the first end of the conduit to enable direct connection between the conduit and the subsea structure. A method of disconnecting a conduit from a subsea structure, and a system for connecting a conduit to a subsea structure are also provided.

A process for installing or removing a subsea structure in a non-vertical manner at a well includes securing a plurality of barges together in a linear formation in which one of the plurality of barges has a downline extending therefrom, connecting an end of the barges to a primary vessel, moving the primary vessel such that one of the barges is positioned over a target at or adjacent to the well, connecting a plurality of secondary vessels by plurality of mooring lines to an opposite end of the barges, tensioning the mooring line so as to fix the opposite end of the barges, positioning a deployment vessel away from the barges, deploying an ROV, manipulating the ROV so as to connect the subsea structure to the downline, and moving the downline and the subsea structure toward or away from the well.

A flow line connector assembly has first and second parts respectively comprising a plug, and a socket configured to receive the plug; a restraining device to resist disconnection of the first and second parts when the plug is received in the socket; and flow tubes, wherein each of the plug and the socket has a respective flow tube and the flow tubes are adapted to interconnect to form Ca conduit for fluid to flow between the first and second parts when the plug is received in the socket.

This invention relates to a method of positioning an end (210) of a pipeline (200) on a subsea structure (300). The method comprises the steps of: (a) providing a channel (305) on the subsea structure, the channel having an open end adjacent to a receptacle (335) on the subsea structure, (b) providing a pipeline, (c) attaching a connector (325) to an end of the pipeline, (d) laying the end of the pipeline with the connector attached into the channel, and (e) pulling the pipeline end along the channel such that the connector exits the open end of the channel and is received by the receptacle. The invention also relates to a channel for use in the method and a subsea structure wherein the channel is provided on the upper surface of the subsea structure.