A method for tying back a subsea well assembly to a surface platform and a tieback connector used to perform this operation. The tieback connector includes a mandrel having an axis, external threads, an upward facing lip on an external lower end portion of the mandrel, a backup ring having internal threads engaged with the external threads of the mandrel, a sleeve carried on an outside diameter of the backup ring. When the mandrel is rotated relative to the backup ring, the mandrel moves axially upward relative to the sleeve, deforming an annular seal assembly between the upward facing lip of the mandrel and the load bearing surface of the sleeve, thereby creating a seal between the apparatus and the wellhead housing.

A method for tying back a subsea well assembly to a surface platform and a tieback connector used to perform this operation. The tieback connector includes a mandrel having an axis, external threads, an upward facing lip on an external lower end portion of the mandrel, a backup ring having internal threads engaged with the external threads of the mandrel, a sleeve carried on an outside diameter of the backup ring. When the mandrel is rotated relative to the backup ring, the mandrel moves axially upward relative to the sleeve, deforming an annular seal assembly between the upward facing lip of the mandrel and the load bearing surface of the sleeve, thereby creating a seal between the apparatus and the wellhead housing.

The present invention relates to a hydrocarbon production inline manifold system. The inline manifold system includes a carrier pipe with a longitudinal carrier pipe axis. The carrier pipe is provided with a plurality of hubs each with a jumper port. A hub longitudinal axis is arranged perpendicular to the carrier pipe axis. The hub longitudinal axes of the plurality of hubs are in a common plane with the carrier pipe axis. A flow line is located inside the carrier pipe. At least one valve is located in a flowpath between each of the plurality of hubs and the flow line.

The present invention relates to a hydrocarbon production inline manifold system. The inline manifold system includes a carrier pipe with a longitudinal carrier pipe axis. The carrier pipe is provided with a plurality of hubs each with a jumper port. A hub longitudinal axis is arranged perpendicular to the carrier pipe axis. The hub longitudinal axes of the plurality of hubs are in a common plane with the carrier pipe axis. A flow line is located inside the carrier pipe. At least one valve is located in a flowpath between each of the plurality of hubs and the flow line.

The present invention concerns a two flow, hydrocarbon production fluid flow path connecting concentric hub. The hub comprises a first and second end sections, each with a concentric port, a concentric inner flow path forming a part of an inner flow path and a side port forming a part of an outer flow path in an annulus surrounding the inner flow path. A female and a male coupling section, each with an inner cylindrical flow section form a part of the concentric inner flow path, and female and male coupling section outer parts surrounding the female and the male coupling section inner cylindrical flow section form a part of the outer flow path in the annulus surrounding the concentric inner flow path. A sealing surface is located between the male coupling section and the female coupling section. The invention also concerns use of the above concentric hub.

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.

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.

Embodiments usable within the scope of the present disclosure relate generally to a connector apparatus and methods usable to securely and repeatedly connect a sub-sea fluid conduit to another fluid conduit or well equipment, such as a manifold, a wellhead, a BOP, or other associated items. The disclosed embodiments further relate to systems and methods usable to remotely disconnect the fluid conduit and automatically shut off fluid flow therethrough. The male connector includes a flow control valve adapted to open upon connection with a female connector and to close upon disconnection from the female connector. The female connector is adapted to actuate the flow control valve of the male connector to the open position. The male connector includes a biasing member that actuates the flow control valve of the male connector to the closed position.

Embodiments usable within the scope of the present disclosure relate generally to a connector apparatus and methods usable to securely and repeatedly connect a sub-sea fluid conduit to another fluid conduit or well equipment, such as a manifold, a wellhead, a BOP, or other associated items. The disclosed embodiments further relate to systems and methods usable to remotely disconnect the fluid conduit and automatically shut off fluid flow therethrough. The male connector includes a flow control valve adapted to open upon connection with a female connector and to close upon disconnection from the female connector. The female connector is adapted to actuate the flow control valve of the male connector to the open position. The male connector includes a biasing member that actuates the flow control valve of the male connector to the closed position.

Latch position indicator systems remotely determine whether a latch assembly is latched or unlatched. The latch assembly may be a single latch assembly or a dual latch assembly. An oilfield device may be positioned with the latch assembly. Non-contact (position), contact (on/off and/or position) and hydraulic (flowmeter), both direct and indirect, embodiments include fluid measurement systems, an electrical switch system, a mechanical valve system, and proximity sensor systems.