A technique facilitates deployment of equipment, e.g. an electric submersible pumping system, in a subsea production operation. According to an embodiment, a subsea tree assembly, e.g. a horizontal subsea tree assembly, comprises a spool body housing having a channel extending therethrough. A production receptacle structure is secured within the channel and provides a reduced internal profile for securing wellbore equipment. For example, the internal profile may be constructed to sealably receive a cable hanger used to support power cable by which an electric submersible pumping system may be suspended. The production receptacle structure also may be equipped with a production stab for interfacing with a tubing hanger located below the production receptacle structure.

A method for pulling a crown plug that includes the steps of providing a subsea lubricator having a longitudinal through bore; providing a jacking string with a landing sub and a crown plug connector; lowering the subsea lubricator to a christmas tree and lowering the jacking string to the lubricator, and, connecting the plug connector to the crown plug; jacking up the jack such that tensile forces cause the crown plug to be released from the christmas tree; raising the jacking string and crown plug and detaching the crown plug from the crown plug connector.

A method is for constructing a subsea well and an associated unit. The method may include: providing a unit having at least one component of a flow control assembly, the flow control assembly to be operable for controlling a flow of injection or production fluid during operation of the well after the well has been constructed; lowering the unit through sea toward a seabed; receiving part of the unit in a subsurface of the seabed to anchor the unit in place, part of the unit projecting above the seabed, whereby the component of the flow control assembly is positioned in the projecting part; and performing at least one well construction operation through a bore in the unit.

One illustrative apparatus (100) disclosed herein includes a stab body (37), at least one inlet/outlet (61) and a coupler body (35) positioned around the stab body (37), wherein the coupler body (35) is adapted to rotate relative to the stab body (37). Also included is at least one hydraulic coupling element (70) positioned on the coupler body (35) and at least one coiled tube (52) positioned around the stab body (37), the at least one coiled tube (52) being in fluid communication with the at least one first hydraulic coupling element (70) and the at least one inlet/outlet (61).

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.

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.

Transducer assembly for an offshore drilling riser, in an example, includes a spool for connecting into the riser and a protrusion extending around the side wall of the spool. A recess extends around the protrusion between upper and lower sloping surfaces. Upper transducer bores are spaced around the protrusion and extend from the upper sloping surface downward and inward into the spool bore and lower transducer bores extend from the lower sloping surface upward and inward into the spool bore. A base of a rigid non-metallic material is located in each of the transducer bores. A seal ring extends around a cylindrical exterior portion of each of the bases and one of the transducer bores. An acoustic transducer element is mounted to the outer end of each of the bases. The transducer assembly can detect drilling fluid and form sealing.

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.

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.

The invention relates to the alignment of a tubing hanger (14) when installed in a subsea wellhead (11). Sensors (39a,b; 40a,b) detect when the orientation is correct and send a signal to the surface to provide positive confirmation of correct orientation, before a XMT (15) is installed on the wellhead (11) and the HP riser (31) removed, etc.