Abstract: A subsea variable speed drive apparatus comprising a pressure resistant container (90) comprising a curved wall section having a curved, internal surface (90a); and a variable speed drive comprising at least one power electronics module (50) arranged inside the container and held at a predetermined ambient pressure. The at least one power electronics module is mounted on a heatsink (40) which is mounted on the internal surface, the heatsink comprising a curved surface (40b) contacting the internal surface and having a radius of curvature corresponding to the radius of curvature of the internal surface. A subsea hydrocarbon fluid pumping system comprising such subsea variable speed drive apparatuses and a related method are also disclosed.

Abstract: The invention proposes a double barrier pressure compensator for performing a pressure compensation between seawater surrounding a subsea installation and a medium filling a volume of the subsea installation. Said pressure compensator comprises: —a housing (20) having a first opening (202b) and a second opening (30); —a first bellows (4) and a second bellows (5) arranged one above the other within the housing (20) and each sealingly fixed to the housing (20) at their distal ends (43, 53); —a moving separation element (6) adapted to move inside the housing (20) and sealingly fixed to each of the proximal ends (44, 54) of the first and second bellows (4, 5) so as to separate a first compartment (21) from a second compartment (22) of the housing (20) sealed with respect to each other.

Abstract: A subsea variable speed drive apparatus comprising a pressure resistant container (90) comprising a curved will section having a curved, internal surface (90a); and a variable speed drive comprising at least one power electronics module (50) arranged inside the container and held at a predetermined ambient pressure. The at least one power electronics module is mounted on a heatsink (40) which is mounted on the internal surface, the heatsink comprising a curved surface (40b) contacting the internal surface and having a radius of curvature corresponding to the radius of curvature of the internal surface. A subsea hydrocarbon fluid pumping system comprising such subsea variable speed drive apparatuses and a related method are also disclosed.

Abstract: An apparatus and associated method for mixing at least a first fluid phase having a first density and a second fluid phase having a second density, the apparatus comprising; at least one container (1), the container comprising at least one inlet (2) for a multiphase flow and at least one outlet (3) at a lower axial end of the container (1), a hollow flow regulating device (4) axially arranged within the container (1), wherein a first end of the flow regulating device (4) is arranged in a distance from the outlet (3) providing a drainage gap (5) between the flow regulating device (4) and the outlet (3), which drainage gap (5) has a drainage area, the flow regulating device (4) comprising a number of perforations (6) along the axial length thereof and a discharge means (7) in a first end, which discharge means (7) opens towards the outlet (3), the flow regulating device (4) being connected to a position adjustment device (8), the position adjustment device (8) being arranged to move the flow regulating device (

Abstract: The present invention regards a manifold for use in a flow system, comprising a longitudinal main pipe section (1) with one inlet (13) connectable to a feed pipe (9) and at least two outlets (14) arranged in a row along the main pipe section (1), where a center axis (15) of the main pipe section (1) during normal use extends in a mainly horizontal direction. The outlets (14) are arranged in a lower half of the main pipe section (1) and connected to outlet pipe sections (22) arranged with a center axis (21) extending with an downward angle from the main pipe section (1). The invention also regards a method for distributing a mixed flow into several pipes and a method for cooling a multiphase fluid.

Abstract: A subsea cooling assembly has a block module for the accommodation of electronics or power components and a cover element. The block module is arranged with at least one recess, with the electronics or power components being arranged in the at least one recess of the block module for the transfer heat between the electronics or power components and the surrounding sea through the block module. The cover element has outer rim portions arranged to fit with outer rim portions of the at least one recess for closing off the interior of the at least one recess. The block module has at least one strength supporting structure arranged to provide load support to at least a portion of the cover element which is distanced away from the outer rim portions of the cover element.

Abstract: The present invention regards a valve arrangement comprising a housing and a mainly cylindrical valve element arranged rotatable within the housing, wherein the housing has at least one supply port, at least one exhaust port and at least one outlet/inlet opening. These ports and opening are arranged at a distance from each other along a rotation axis of the valve element. The valve element comprises at least one first bore extending along the rotation axis connecting the supply port with the at least one outlet/inlet opening in one position of the valve element, and at least one second bore extending along the rotation axis connecting the same outlet/inlet opening with the exhaust port in a second position of the valve element, the bores being configured such that they are separated from each other.

Abstract: An apparatus and associated method for mixing at least a first fluid phase having a first density and a second fluid phase having a second density, the apparatus comprising; at least one container (1), the container comprising at least one inlet (2) for a multiphase flow and at least one outlet (3) at a lower axial end of the container (1), a hollow flow regulating device (4) axially arranged within the container (1), wherein a first end of the flow regulating device (4) is arranged in a distance from the outlet (3) providing a drainage gap (5) between the flow regulating device (4) and the outlet (3), which drainage gap (5) has a drainage area, the flow regulating device (4) comprising a number of perforations (6) along the axial length thereof and a discharge means (7) in a first end, which discharge means (7) opens towards the outlet (3), the flow regulating device (4) being connected to a position adjustment device (8), the position adjustment device (8) being arranged to move the flow regulating device (

Abstract: The present invention regards a valve arrangement comprising a housing (1) and an mainly cylindrical valve element (2) arranged rotatable within the housing, where the housing has at least one supply port (11) and at least one exhaust port (12) and at least one outlet/inlet opening (13,14,15,16). These ports and opening are arranged in a distance from each other along a rotation axis for the valve element. The valve element comprises at least one first bore extending along the rotation axis connecting the supply port with the at least one outlet/inlet opening in one position of the valve element, and at least one second bore extending along the rotation axis connecting the same outlet/inlet opening with the exhaust port in a second position of the valve element, the bores being configured such that they are separated from each other.

Abstract: The invention concerns a dual-type plug to be used in a wellhead. The plug has a separate retrievable inner plug (50). Retrieving only the inner plug allows the use of lighter workover equipment than if the whole plug (10) must be pulled.