A hydrocarbon production field layout comprising a first pipeline (1) with a first inner diameter and a second pipeline (2) with the first inner diameter. A cut off valve (20) with an inner bore with the first diameter, is arranged in a connecting arrangement between an end of the first pipeline (1) and an end of the second pipeline (2). At least one dual main header manifold (3) is in fluid connection with at least one hydrocarbon well (8, 9). A first branch pipe (16, 18) with a first valve (5, 6) is branched off from the first pipeline (1) and a second branch pipe (17, 19) with a second valve (5, 7) is branched off from the second pipeline (2). The branch pipes are connected to the at least one manifold (3, 4).

A system to be used with one or more well slots in an oil and gas operation is disclosed. At least one manifold is associated with the one or more well slots and with first passage-ways for the one or more well slots. An intervention subsystem includes second passage-ways and a path selector valve. The path selector valve is selectable to associate together at least two of the second passage-ways, which enables a maintenance action to be performed for an intended well slot of the one or more well slots.

A retrievable connection module for establishing a fluid flow between a subsea station and a subsea flow line. The connection module includes a first fluid port, a first connection profile, a second fluid port, a second connection profile, and a utility arrangement which alters or monitors an aspect or a characteristic of the fluid flow between the first and the second fluid ports. The first connection profile is releasably couplable to a flow line to permit a fluid communication between the flow line and the first fluid port. The second connection profile is releasably couplable to the subsea station to permit a fluid communication between a subsea well and the second fluid port. The first connection profile disconnects the flow line and restricts the fluid communication at the first fluid port. The second connection profile disconnects from the subsea station and restricts the fluid flow at the second fluid port.

The invention provides a subsea oil and gas production installation, methods of installing the installation and methods of use. The installation comprises a subsea production system comprising a first production pipeline and a second production pipeline, a first subsea manifold in fluid communication with the first production pipeline comprising a fluid access interface and a flowline connector, a removable module fluidly connected to the fluid access interface of the first subsea manifold and configured to receive production fluid from one or more subsea wells and a second subsea manifold in fluid communication with the second production pipeline. The first subsea manifold defines a first flow path between the fluid access interface and the first production pipeline and a second bypass flow path between the fluid access interface and the flowline connector. The first and the second subsea manifolds are fluidly coupled to one another by a connecting flowline which is connected at a first end to the flowline connector of the first subsea manifold. The removable module comprises a flow control means operable to selectively route the production fluid from one or more subsea wells into the first production pipeline via the first flow path defined by the manifold, and/or into the second production pipeline via the second bypass flow path, the connecting flowline and the second subsea manifold.

A manifold for subsea recovery operations with reduced welding requirements through the use of additive manufacturing and prefabrication. The manifold can be combined with other manifolds and includes fewer leakage/failure points due to the reduced number of welds in the manifold.

A subsea connector assembly with flowmeter incorporated therein. The assembly is particularly configured for securing a flexible flowline at subsea production managing hardware such as at a manifold at a seabed or Christmas tree at a well head. Incorporating a flowmeter into the connector as opposed to such comparatively larger scale hardware ultimately saves substantial material, transport, installation, footspace and other costs.

In one illustrative embodiment, the manifold comprises a block with at least one drilled header hole formed within the block, a plurality of drilled flow inlet holes formed within the block, wherein the number of drilled flow inlet holes corresponds to the number of the plurality of external flow lines that supply fluid (e.g., oil/gas) to the manifold and a plurality of isolation valves coupled to the block wherein the valve element for each of the isolation valves is positioned within the block.

The present invention provides a nonresident system for depressurizing subsea apparatus and lines comprising a depressurizing tool (5) adapted for being coupled to an ROV interface (6) of a subsea apparatus, wherein the depressurizing tool (5) is coupled to an ROV (4), wherein: the ROV interface (6) comprises a first pipeline (6a) for connection to a first hydrocarbon transport line (8), a second pipeline (6b) for connection to second hydrocarbon transport line (9), and a connection mandrel (6d); and the depressurizing tool (5) comprises a suction line (5a) adapted for being connected to the first pipeline (6a) for connection to the first hydrocarbon transport line; a discharge line (5b) adapted for being connected to the second pipeline (6b) for connection to the second hydrocarbon transport line; a pump (5c); and a connector (5d) adapted for being connected to the connection mandrel (6d) of the ROV interface (6). A method is also provided for depressurizing subsea apparatus and lines, comprising the steps of: removing a blind cap (15) from an ROV interface (6) with aid of an ROV (4); coupling a depressurizing tool (5) to the ROV interface (6) of a subsea apparatus (10); suction and removal of fluid from a first hydrocarbon transport line, wherein the first hydrocarbon transport line comprises hydrate formation; and pressurizing and reinjecting the fluid into a second hydrocarbon transport line.

A technique for engaging a bore connector with a receptacle on subsea equipment. The technique may include providing an operator with a visual indication of acceptable alignment between the connector and the receptacle in advance of attaining engagement. In this way, a proper and reliably sealed engagement may be achieved. Further, the bore connector and techniques for use thereof include added indication of completed sealed engagement sufficient for testing and/or operational use of the connector in supporting a fluid application directed at the equipment through the receptacle.

The present invention relates to hydrocarbon well fluid manifold module (1) with a manifold module housing (9) having a transversal bore terminating in a longitudinal bore (3) in fluid connection with the transversal bore (6). One or more cut off valves are located (7) in the transversal bore (6). The longitudinal bore (3) extend through the module housing (9) and form a first flow port (11) and a second flow port (12) aligned with the first flow port (11). Plane, connecting surfaces surround the two flow ports (11,12). The two flow ports and connecting surfaces are identical. The first connecting surface (13) and the second connecting surface (14) are adapted to be connected to at least one further similar manifold module (20). The invention also concerns a manifold for a hydrocarbon well assembled of such modules.