A subsea wellhead assembly 1 comprises: a subsea wellhead 2; a template 6 associated with the wellhead; subsea riser system equipment 4 connected to the wellhead and one or more connection members. The subsea riser system equipment 4 is also connected to the template 6 by the one or more connection members so that lateral support is provided to the subsea riser system equipment 4 from the template. A method of installing the subsea wellhead assembly 1 is also provided.

A system for installing a corrosion cap on a mudline suspension system may include a method of inserting the corrosion cap into a running tool. One or more drive pins of the corrosion cap may be slotted into one or more J-slots of the running tool. The one or more drive pins may be positioned in a circular section of the one or more J-slots. One or more shear screws may be set in holes of the running tool corresponding to a vertical section or a horizontal section of the one or more J-slots. The corrosion cap may be removably locked to the running tool. The corrosion cap is landed on the mudline suspension system of a well. The one or more shear screws may be sheared to disengage the corrosion cap from the running tool. The running tool may be retrieved to a surface above the well.

It is disclosed a satellite well structure (300) and method for expanding a subsea satellite well system. The subsea satellite well structure (300) comprising:—a seabed-based foundation (330) supporting a subsea wellhead (340);—a first landing position (310) configured to receive a Christmas tree module (200) for interfacing the subsea wellhead (340);—a second landing position (320) configured to receive a subsea connection module (100) for connecting the Christmas tree module (200) to a hydrocarbon fluid export flowline; and—a plurality of Christmas tree guide posts configured to support the installation of the Christmas tree module; wherein the first landing position has a landing envelope defined by the plurality of Christmas tree guide posts, and wherein the second landing positions is arranged offset the landing envelope of the first landing position, (allowing:—the subsea connection module (100) to be landed on and retrieved from the seabed-based well structure (300) with the Christmas tree module (200) landed in the first landing position (310); and—the Christmas tree module (200) to be landed on and retrieved from the seabed-based well structure (300) with the subsea connection module (100) landed in the second landing position (320).

A sealing arrangement for an oil and/or gas well, including a rotation portion and a sealing portion. Rotation of the rotation portion causes the sealing portion to engage a surface of the oil and/or gas well so as to substantially form a seal therebetween.

A sealing arrangement for an oil and/or gas well, including a rotation portion and a sealing portion. Rotation of the rotation portion causes the sealing portion to engage a surface of the oil and/or gas well so as to substantially form a seal therebetween.

A subsea blind stab (100), comprises a stabbing part (110) for insertion into a hot stab receptacle, the stabbing part (110) including a housing, a central rod (150) slidably arranged within the housing and at least one fluid communication line from the external side of the stabbing part (110) to an internal fluid communication line (180) within the rod (150). The at least one fluid communication line is open in a first position of the rod (150) relative the housing and closed in a second position of the rod (150) relative the housing. The stab (100) further comprises a hollow body (120) attached to one end of the stabbing part (110); a piston (130) slidably arranged in the hollow body (120), with a spring element (160) arranged between the piston (130) and a spring attachment element (170) connected to the body. A first side of the piston (130) forms a fluid chamber (140) in the hollow body. The fluid chamber (140) is in fluid communication with the internal fluid communication line in the rod, and a second side of the piston (130) is exposed to a pressure of the surrounding environment.

Installation for producing fluid such as crude oil having a floating support having at least two tanks, an undersea bottom-to-surface connection pipe having a first pipe portion on the sea bottom from a well head to the bottom end of a second pipe portion at the floating support, a first auxiliary pipe for transporting gas extending from the floating support to the bottom end of the second pipe, and a plurality of valves for isolating or putting into communication the first auxiliary pipe, for isolating or putting into communication the first production pipe portion and the second production pipe portion, end to end, and suitable for isolating or putting into communication the proximal end of the first production pipe portion and the bottom end either of a fourth auxiliary pipe rising directly to the surface, or a bottom portion of the first auxiliary pipe.

Installation for producing fluid such as crude oil having a floating support having at least two tanks, an undersea bottom-to-surface connection pipe having a first pipe portion on the sea bottom from a well head to the bottom end of a second pipe portion at the floating support, a first auxiliary pipe for transporting gas extending from the floating support to the bottom end of the second pipe, and a plurality of valves for isolating or putting into communication the first auxiliary pipe, for isolating or putting into communication the first production pipe portion and the second production pipe portion, end to end, and suitable for isolating or putting into communication the proximal end of the first production pipe portion and the bottom end either of a fourth auxiliary pipe rising directly to the surface, or a bottom portion of the first auxiliary pipe.

A subsea housing assembly, in particular for a subsea sensor, includes a first housing portion and a second housing portion. The first housing portion includes a first electrical connection for data communication and the second housing portion includes a second electrical connection for data communication. A wall provides separation between the first housing portion and the second housing portion of the subsea housing. An inductive coupler, that includes a first coupling section disposed in the first housing portion and a second coupling section disposed in the second housing portion, is provided. The inductive coupler is configured to provide inductive coupling across the wall for providing at least a data communication between the first and second electrical connections.

A subsea housing assembly, in particular for a subsea sensor, includes a first housing portion and a second housing portion. The first housing portion includes a first electrical connection for data communication and the second housing portion includes a second electrical connection for data communication. A wall provides separation between the first housing portion and the second housing portion of the subsea housing. An inductive coupler, that includes a first coupling section disposed in the first housing portion and a second coupling section disposed in the second housing portion, is provided. The inductive coupler is configured to provide inductive coupling across the wall for providing at least a data communication between the first and second electrical connections.