A valve block may be assembled, in a controlled environment, a valve block to be modular and purpose built for a specific application. The specific application may be an operation to be performed at a well site. The modular purpose built valve block may be function tested, in the controlled environment. Additionally, the modular purpose built valve block may be pre-packaged, in the controlled environment, to have a digital system to operate and automate the modular purpose built valve block. Further, the modular pre-packaged purpose built valve block may be deployed to the well site, and the modular pre-packaged purpose built valve block may be fluidly coupled to a wellhead. The modular pre-packaged purpose built valve block may be operated to perform the operation at the well site.

A system includes a first split riser, a second split riser, and a gasket. The first split riser includes a first half pipe having a first radial extension and a second radial extension. The first radial extension and the second radial extension have a mating surface. The second split riser includes a second half pipe having a third radial extension and a fourth radial extension. The third radial extension and the fourth radial extension have a corresponding mating surface. The gasket is installed on the mating surface of the first radial extension and the second radial extension. The gasket mates with the corresponding mating surface to form a connection between the first split riser and the second split riser.

A multipurpose latch assembly (MPLA) for installation above the bore of a blowout preventer includes an annular sidewall extending between a top flange and a bottom flange and having an interior bore surface defining an interior bore. A plurality of latching slots extend through the sidewall and a latching dog is slidably positioned in each latching slot. Actuators are connected to the latching dogs to extend and retract them through the latching slots. A tool having an external slot can be inserted into the bore of the MPLA and selectively engaged by the latching dogs to secure the tool in the bore of above the blowout preventer.

A crown plug for a tree of an oil/gas well/wellhead has a securement arrangement for securing the crown plug within the tree. The main body of the crown plug comprises a solid body creating the barrier within the production bore. The solid body creates a robust, strong and reliable barrier. The crown plug is retained within the outer member through inward distortion which secures the crown plug. The securement arrangement arises from an inward radial force that distorts the outer member inwardly to grip a component located within the outer member. The outer member elastically deforms and the outer member returns to a released position once the clamping force is released. Two concentric oppositely arranged tapered surfaces move axially to create the inwardly directed force. The clamping force and the solid body together provide an improved crown plug which is easy and reliable to operate.

A modular valve tree may have two or more blocks. Additionally, a first block may have a flow passage therethrougt, with an inlet and an outlet and a second block may have a flow passage therethrough with including an inlet and an outlet. Further, an insert may be provided comprising sealing elements. The insert may be partially disposed within each of the first block and the second block and the insert has a throughbore fluidly connecting the first block outlet to the second block inlet. Furthermore, the sealing elements are configured to seal external surfaces of the insert against an internal surface of the respective flow passages. A retention system may retain the blocks in position and compress and engage one or more of the sealing elements.

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).

A multipurpose latch assembly (MPLA) for installation above the bore of a blowout preventer includes an annular sidewall extending between a top flange and a bottom flange and having an interior bore surface defining an interior bore. A plurality of latching slots extend through the sidewall and a latching dog is slidably positioned in each latching slot. Actuators are connected to the latching dogs to extend and retract them through the latching slots. A tool having an external slot can be inserted into the bore of the MPLA and selectively engaged by the latching dogs to secure the tool in the bore of above the blowout preventer.

A valve block may be assembled, in a controlled environment, a valve block to be modular and purpose built for a specific application. The specific application may be an operation to be performed at a well site. The modular purpose built valve block may be function tested, in the controlled environment. Additionally, the modular purpose built valve block may be pre-packaged, in the controlled environment, to have a digital system to operate and automate the modular purpose built valve block. Further, the modular pre-packaged purpose built valve block may be deployed to the well site, and the modular pre-packaged purpose built valve block may be fluidly coupled to a wellhead. The modular pre-packaged purpose built valve block may be operated to perform the operation at the well site.

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.