Abstract: The invention concerns an electrostatic coalescing device that includes a vessel or a pipe through which a mixture of fluids flows. At least one metal electrode plate and transformer are arranged inside the pipe/vessel. The electrode plate and transformer are fully enclosed by insulation, and the transformer is energized from an external alternating low voltage source/power supply located outside the vessel/pipe. The transformer includes a first end of a high voltage winding connected electrically to the metal plate within the insulation.

Abstract: A coalescing apparatus including a casing having an inner chamber for accommodating insulating fluid. At least one tube of electrically insulating material extends through the casing and the chamber. Each tube forms a flow channel for emulsion to be treated. A set of electrodes is mounted in the chamber. The tube is allotted at least one pair of electrodes of the set. A voltage set is configured to apply mutually different electric potentials to the electrodes of each electrode pair so as to form an electric field between them and thereby an electric field inside the respective tube. A heater is configured to heat the insulating fluid so as to allow the insulating fluid to transfer heat to emulsion flowing through at least one tube and thereby raise the temperature of the emulsion. An emulsion treatment system includes a coalescing apparatus. A coalescing method.

Abstract: A method for fabricating a sheet-shaped electrode for an electrostatic coalescing device. A layered material structure including an electrically conductive layer for forming a conductive member of the electrode and two electrically non-conductive insulation layers are arranged in an envelope. The insulation layers include thermoplastic or thermoset material for forming the insulation of the electrode. The conductive layer is arranged between the insulation layers. The envelope is sealed. Gas is evacuated from the envelope. The material structure is heated to a temperature above the melting temperature of the thermoplastic material or above the curing temperature of the thermoset material so as to consolidate the material structure while keeping the material structure inside the evacuated envelope. The material structure is cooled and removed from the envelope.

Abstract: An electrostatic coalescing device including at least one pair of sheet-shaped electrodes arranged at a distance from each other side-by-side. Each one of the electrodes includes a sheet-shaped conductive member of electrically conductive material. The mutual distance between the conductive members of the two electrodes of the pair varies along the electrodes as seen in a direction perpendicular to the intended flow direction of fluid passing through the flow passage between the electrodes. A power supply is configured to apply mutually different electric potentials to the conductive members of the electrodes of the pair so as to form an electric field between the electrodes. The conductive member of one electrode of the pair is planar, whereas the conductive member of the other electrode of the pair is corrugated.

Abstract: A fluid treatment tank for use in a well fluid processing system. The tank is divided into at least three compartments, including an oil treatment compartment for receiving oil from a separator vessel of the well fluid processing system so as to allow stabilization and/or final separation and treatment of the oil, a reject treatment compartment for receiving reject fluid from one or more water treatment units of the well fluid processing system so as to allow gravitational separation of heavier and lighter components of the reject fluid, and a water treatment compartment for receiving de-oiled water from one or more water treatment units of the well fluid processing system so as to allow degassing and/or final separation of the water. Also, a well fluid processing system including such a fluid treatment tank.

Abstract: A separator apparatus for separating immiscible fluid components of different specific gravities. A body includes an internal flow channel for a mixture of fluid components to be separated. A rotation generating device brings the fluid mixture to rotate about the longitudinal axis of the flow channel. An extraction device withdraws a central part of the rotating fluid mixture flowing through the flow channel. A bubble introducer introduces micro-sized gas bubbles into the fluid mixture so as to thereby enhance the separation of the fluid components. Also a method for separating immiscible fluid components of different specific gravities.

Abstract: A vessel having an implement located in a fluid receiving space inside the vessel. The vessel includes an enclosure for enclosing a closed space around the implement. An actuator actuates the enclosure to and fro between an open position, in which the enclosure does not enclose a closed space around the implement, and a closed position, in which the enclosure forms a fluid tight or at least essentially fluid tight casing that encloses a closed space around the implement so as to prevent fluid in the fluid receiving space outside the closed space from flowing into the closed space. A method for cleaning and/or calibrating an implement located in a fluid receiving space inside such a vessel and a method for removing an implement from or inserting an implement into a fluid receiving space inside a vessel.

Abstract: The invention concerns an electrostatic coalescing device that includes a vessel or a pipe through which a mixture of fluids flows. At least one metal electrode plate and transformer are arranged inside the pipe/vessel. The electrode plate and transformer are fully enclosed by insulation, and the transformer is energized from an external alternating low voltage source/power supply located outside the vessel/pipe. The transformer includes a first end of a high voltage winding connected electrically to the metal plate within the insulation.

Abstract: An electrical appliance including at least one sheet-shaped electrode and a connecting device for electrically connecting the at least one electrode to a voltage source. The connecting device includes a casing having two or more tubular casing parts. Each casing part enclosing a channel filled with a dielectric medium, and an elongated conductor for feeding electric power from the voltage source to the at least one electrode. The conductor extends through the channels of the casing parts and is surrounded by the dielectric medium therein. The conductor extends through a hole in an electrically conductive member of each individual electrode. The conductor is electrically connected to the conductive members of the electrodes and each individual electrode has a part arranged between two of the casing parts with the two casing parts clamped against opposite sides of the intermediate electrode part.

Abstract: A well fluid processing system has a separator for separating heavier and lighter components of well fluid flowing from a subsea well and directing the lighter components to flow to a surface processing facility. The separator has a cylindrical chamber having a length at least ten times its diameter. A coalescing unit located in the chamber causes water droplets in the well fluid flowing through the tubes to coalesce into larger droplets. A dielectrophoresis unit having undulating sheets spaced close to each other is also located in the chamber. The sheets of the unit are supplied with an electrical potential to force the water droplets into predetermined passage portions to form high water content sections of liquid. Bypass valves allow backflushing of one of the separators while others continue to operate.