A suction anchor for a subsea well is provided. The suction anchor includes a wellhead support structure. The wellhead support structure is at least in part external of the internal volume of the suction anchor.

A suction anchor for a subsea well is provided. The suction anchor includes a wellhead support structure. The wellhead support structure is at least in part external of the internal volume of the suction anchor.

A foundation for a subsea assembly is provided. The foundation includes connection points. The connection points permit other components to be connected to the foundation and permit loads to transfer from the other components into the foundation. The foundation may be a suction anchor. A method of converting an exploration well using the foundation to a production well is also provided.

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).

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 system for tethering a subsea blowout preventer (BOP) or well head is disclosed. In at least one embodiment, the system comprises an interface associable with the BOP, and more than one anchors disposed about the BOP. Each anchor is configured to carry or support a tensioning system arranged in operable association with a respective tether. Each tether is arranged so as to link a respective anchor with a respective operable means associated with the BOP. Furthermore, each of the respective operable means are configured in operable association with the interface such that tension in the tethers can be adjustable either individually or together as a group of two or more tethers, by way of the interface.

A system for tethering a subsea blowout preventer (BOP) or well head is disclosed. In at least one embodiment, the system comprises an interface associable with the BOP, and more than one anchors disposed about the BOP. Each anchor is configured to carry or support a tensioning system arranged in operable association with a respective tether. Each tether is arranged so as to link a respective anchor with a respective operable means associated with the BOP. Furthermore, each of the respective operable means are configured in operable association with the interface such that tension in the tethers can be adjustable either individually or together as a group of two or more tethers, by way of the interface.

A method of connecting a lower pipe portion to a subsea foundation is provided. The method comprises: providing the subsea foundation, wherein the subsea foundation comprises an upper pipe portion connected to the subsea foundation, deploying the subsea foundation subsea; and connecting the lower pipe portion to the upper pipe portion. A subsea foundation system is also provided. The subsea foundation system comprises: a subsea foundation; an upper pipe portion connected to the subsea foundation, and a lower pipe portion, wherein the subsea foundation system is arranged such that subsea the lower pipe portion can be connected to the upper pipe portion. The lower pipe portion may be connected to the subsea foundation in a stowed position before deployment subsea. The lower pipe portion may be connected to a pull-in arrangement before deployment subsea. The subsea foundation may comprise a pipe overlap section that is arranged to overlap a portion of the upper pipe portion and/or the lower pipe portion when the lower pipe portion is connected to the upper pipe portion.

A system includes a foundation with a post mounted on the foundation top surface and a pipe module configured to couple to the foundation. The pipe module has a yoke to cooperate with the post to engage the pipe module with the foundation. The pipe module is connected to the end of a pipeline and is configured to slide along the foundation responsive to longitudinal and angular movements of the end of the pipeline. A method includes deploying a foundation subsea and securing the foundation to a seafloor. The foundation has a post. The method includes deploying the pipe module via the pipeline suspended by a pipe module installation machine. The pipe module has a yoke. The method includes engaging the yoke with the post, paying out the pipeline to lower the yoke, and lowering and engaging the pipe module with the foundation.

Systems and method for providing a soft landing of a wellhead connector onto a subsea wellhead are provided. One such system includes a wellhead connector configured to be coupled to a subsea wellhead, and a soft landing system disposed on a body of the wellhead connector. The soft landing system includes one or more cylinder assemblies coupled to the body of the wellhead connector, and one or more valve assemblies coupled to the body of the wellhead connector. Each cylinder assembly includes a barrel, a rod disposed within the barrel and extending in one direction from the barrel, and a pad attached to an extended end of the rod. The one or more valve assemblies are each fluidly coupled to the one or more cylinder assemblies.