Adapter (15) for an oil or gas field Christmas tree (4), said adapter (15) comprising a first interface (16) to connect the adapter (15) to a corresponding Christmas tree interface (17) on the top of the Christmas tree (4), distinctive in that the adapter (15) further comprises a second interface (18), at least one feed-through, and at least one of: a well barrier element, an internal profile for setting a plug, a hanger or a combined hanger and plug.

Embodiments of the present disclosure include a plugging assembly configured to be disposed within a production flow bore of a tubing spool tree, wherein the plugging assembly includes a body having a central bore, a lock ring disposed about the body, a support sleeve slidably disposed about the body, and an inner body support pin coupled to the support sleeve and extending into the central bore of the body, wherein axial actuation of the inner body support pin drives the support sleeve between the body and the lock ring to actuate the lock ring radially outward, and wherein the plugging assembly is configured to be disposed within a production flow bore of a tubing spool tree.

Methods and apparatus for diverting fluids either into or from a well are described. Some embodiments include a diverter conduit that is located in a bore of a tree. The invention relates especially but not exclusively to a diverter assembly connected to a wing branch of a tree. Some embodiments allow diversion of fluids out of a tree to a subsea processing apparatus followed by the return of at least some of these fluids to the tree for recovery. Alternative embodiments provide only one flowpath and do not include the return of any fluids to the tree. Some embodiments can be retro-fitted to existing trees, which can allow the performance of a new function without having to replacing the tree. Multiple diverter assembly embodiments are also described.

A system for producing well production fluids through a tubing hanger connected with a tubing string, in certain embodiments, includes a subsea tree and a tubing spool. The subsea tree includes a production flow passage, and the tubing spool includes a longitudinal bore configured to receive the tubing hanger and a lateral production flow passage configured to transfer well production fluids to the production flow passage of the subsea tree. The subsea tree and the tubing spool are configured to be run and retrieved independently of one another in any order.

A wet-mateable connector for making a connection underwater comprises a male component 10 having a male pin 14 and a female component 20 having a female socket 24 for receiving the male pin. The male component has a male wiper seal assembly 16 which moves between a decoupled and a coupled position during coupling of the male component 10 and female component 20 so as to wipe at least a portion of the male pin 14. A latch 42a, 48 is provided which is arranged to latch the male wiper seal assembly 16 to the female component 20 during coupling such that when the male and female components are decoupled, the male wiper seal assembly 16 is returned to the decoupled position.

One illustrative apparatus disclosed herein includes a stab body, a first and second inlet/outlet and a coupler body positioned around the stab body, wherein the coupler body is adapted to rotate relative to the stab body. Also included is a first and second hydraulic coupling element positioned on the coupler body and a first and second coiled tube positioned around the stab body, the first and second coiled tubes being in fluid communication with the first and second hydraulic coupling elements respectively and the first and second inlet/outlets respectively. Also included is a first and second orientation structure and a tubing hanger. The first and second orientation structures are adapted to engage each other and establish a desired relative orientation between the coupler body and the tubing hanger.

Embodiments of the present disclosure are directed to a system including a flange configured to couple to a component of a mineral extraction system, where the flange includes a base, an exterior annular tapered portion extending from the base, and an annular wall extending from the exterior annular tapered portion, wherein the annular wall at least partially defines a central exterior cavity and at least partially defines an interior annular cavity. The system also includes an inductive power and data transmission system mounted within the flange, wherein the inductive power and data transmission system comprises a first component and a second component, wherein the first and second components are separated by the annular wall

Methods and apparatus for diverting fluids either into or from a well are described. Some embodiments include a diverter conduit that is located in a bore of a tree. The invention relates especially but not exclusively to a diverter assembly connected to a wing branch of a tree. Some embodiments allow diversion of fluids out of a tree to a subsea processing apparatus followed by the return of at least some of these fluids to the tree for recovery. Alternative embodiments provide only one flowpath and do not include the return of any fluids to the tree. Some embodiments can be retro-fitted to existing trees, which can allow the performance of a new function without having to replacing the tree. Multiple diverter assembly embodiments are also described.

Provided is a method and apparatus for pulling a crown plug from a subsea horizontal Christmas tree, the method comprising: (a) providing a subsea lubricator having a longitudinal through bore and a jack attached to the subsea lubricator, the jack having a landing area, and the landing area having an opening which is fluidly connected to the lubricator's through bore; (b) providing a jacking string which includes a landing sub and a crown plug connector, the sub having a landing surface; (c) without the jacking string in step b, lowering the subsea lubricator of step a, to the horizontal Christmas tree and attaching the lubricator to the Christmas tree; (d) lowering the jacking string to the lubricator, and, while the landing surface of the landing sub is spaced above and not supported by the landing area of the jack, connecting the plug connector to the crown plug while the landing sub is above and not touching the landing area of the jack; (e) jacking up the jack such that the landing area of the jack contacts the landing surface of the landing sub, and pushes up on the jacking sub and jacking string causing tensile forces to be placed on the crown plug and releasing the crown plug from the profile of the Christmas tree; (f) while the lubricator remains attached to the Christmas tree, raising the jacking string and crown plug through and out of the lubricator and to the surface of the water to remove the tree; and (g) detaching the crown plug from the crown plug connector.

Subsea well assembly having a Xmas tree (107, 207) and wellhead (103). From a tubing hanger (113) a tubing extends into the well. A part of a production flow passage extends vertically from the tubing hanger (113) in a vertical bore (111) of the Xmas tree. A fail close production master valve (PMV) (117) is arranged in the production flow passage. The tubing hanger (113) is arranged below the Xmas tree (107), such as in the wellhead (103). The Xmas tree (107) exhibits a branch (115) that deviates from the vertical bore (111), which branch constitutes part of the production flow passage. The fail close type production master valve (PMV) (117) is arranged in the branch (115).