Abstract: A wellbore machining device is proposed for machining a tubular component of a wellbore. The device includes a control unit at the surface level of the wellbore and a down-hole tool unit connected to the control unit through a wire line. The tool unit includes an elongated guide member, a tool member movably supported on the guide member with respect to at least three axes of motion and a plurality of actuators controlled by the control unit and adapted to move the tool member with respect to the axes of motion. The tool unit further includes two anchor members each mounted to an axial end of the guide member and adapted to releasably clamp the tool unit to the tubular component. The control unit and the tool unit form a computer numerical control device (CNC device) wherein the actuators are electric servo motors controlling an actual position of the tool member with respect to a path and/or a sequence of desired position defined by the control unit.

Abstract: The present invention provides a method of determining a physiochemical property of a drilling fluid at a drilling site during a drilling phase, said method comprising detecting a nuclear magnetic resonance signal from out-of-hole drilling fluid at said site and calculating therefrom a value indicative of said property.

Abstract: A method of processing controlled source electromagnetic (CSEM) data is provided for reducing the airwave contribution. CSEM data are acquired, for example using a conventional towed source (4) and receiver (5) arrangement. The recorded data are weighted in accordance with the geometrical spreading of the airwave component. The differences between pairs of weighted data records are then formed.

Abstract: The gas-liquid separator separates a variable multi-phase flow of gas and liquid in a gas dominated flow and a liquid dominated flow. The separator includes a housing which encloses a separation chamber, an inlet port for feeding the multi-phase flow into the separation chamber, a liquid outlet port for discharging the liquid dominated flow from the separation chamber and a gas outlet port provided at a position above both the inlet port and the liquid outlet port for discharging the gas dominated flow from the separation chamber. Both the inlet port and the liquid outlet port are positioned adjacent to an elongated lower bottom wall of the housing and define a flow direction into the and out of the separation chamber approximately aligned along the bottom wall, wherein the separation chamber extends above the bottom wall in between the inlet port and the liquid outlet port.

Abstract: The present invention relates to a blade pitch controller for a floating wind turbine structure, wherein the floating wind turbine structure may include a support structure supporting a rotor having a number of blades. The controller may include standard blade pitch control means and active damping means. The standard blade pitch control means is arranged to control a blade pitch using a transfer function between a rotor speed error and the blade pitch. The active damping means is arranged to further control the blade pitch on the basis of a speed of a point on the wind turbine structure by converting the speed of a point on the wind turbine structure into a rotor speed error and using the same transfer function that is used in the standard blade pitch control means to convert the rotor speed error into a correction to the blade pitch.

Abstract: A method of processing seismic data representing a physical system, the method comprising a difference between first and second seismic data representing the system in first and second states, respectively, and inverting the difference in accordance with a parameterized model of the physical system to obtain changes in the parameters of the model.

Abstract: The present invention concerns a method for measuring the thickness of any deposit of material on the inner wall of a structure conducting a fluid stream of hydrocarbons, the method comprising the steps of: applying a first heat pulse or continuous heating to at least one first section of the structure removing deposits on the inner wall of the first section of the structure; applying a second heat pulse to both the first section of the structure and at least one second section of the structure, the first and second sections being spaced apart, which heat pulse does not loosen any deposit of material in the second section; measuring the temperature of the wall of the structure or the fluid during the second heat pulse at both the first and second sections; and determining the thickness of any deposit of material on the inner wall of the structure at the second section based on the measured temperatures. The present invention also relates to a corresponding device and arrangement.

Abstract: A method of measuring the thickness of any deposit of material (28) on an inner wall (12) of a structure (14). The method comprises: (a) causing vibrations in the structure; (b) detecting said vibrations in the structure; (c) determining a resonance frequency of the structure based on the detected vibrations; and (d) determining the thickness of any deposit of material on the inner wall of the structure based on the determined resonance frequency.

Abstract: A scrubber for separation of liquid phase and any other constituents from a fluid now that in substance includes a gas. The scrubber is formed as a standing vessel with round cross section, with an outlet for liquid from the bottom and an outlet for gas from the top. The scrubber is distinguished in includes a fluid inlet that either is tangentially oriented relative to the inner wall of the scrubber or equipped with a deflection plate, such that introduced fluid is directed tangentially horizontal or with a small downward slope along the inner wall of the scrubber, into and through a fluid way arranged as a downwards directed spiral within the scrubber, along the inner wall, from a level over or at the inlet to a level at or close to the outlet for liquid, with an opening for gas escape inwards toward the center of the scrubber. The scrubber according to the invention results in very low liquid entrainment.

Abstract: A method is provided for processing measured data to provide information on the structure of a region of the earth. The method comprises providing a flexural rigidity distribution of the region, providing a Young's modulus distribution of the region, and modifying the flexural rigidity distribution with the Young's modulus distribution to obtain an equivalent elastic thickness distribution of the region indicative of the structure thereof.

Abstract: A hot tap clamp. The clamp includes a first clamp part, a second clamp part, a fastener for stable fastening of the clamp parts around a section of a pipeline provided with a hot tap coupling, a pipe socket fixedly integrated with one of the clamp parts at an inner end and extending outward from the clamp part to an outer end, a hub on the outer end of the pipe socket, the pipe socket at the inner end going through the clamp part abutting the surface of the pipeline, such that the pipe socket can be sealingly welded to the pipeline by internal welding.

Abstract: The invention relates to a tank (11) for storage of cryogenic fluids. The tank (11) comprises a base section (12), a vertical wall element (14) and preferably an upper top (19). The tank (11) is provided with a fluid tight barrier (26) intended to prevent the stored fluids to escape to the surroundings. The fluid tight barrier (26) is formed of thin metal plates joined together. At least the vertical wall (14) comprises an inner structurally supporting wall element (24) and an outer structurally supporting wall element (25). The fluid tight barrier (26) is arranged between the inner (24) and the outer (25) structurally supporting wall element. The invention relates also to a method for constructing such tank (11), where the base part (12) is firstly erected whereupon a vertical wall (14) is concreted, preferably by means of slipforming or jumpforming.

Abstract: A water injection system that includes a primary water injection line; an injection fluid supply tank; a high pressure injection pump in fluid communication with the injection fluid supply and primary water injection line for pumping injection fluid in injection fluid supply tank through the primary water injection line; a polymer gel supply tank; and a high pressure chemical injection pump in fluid communication with the polymer gel supply tank and the water injection line configured to pump polymer gel having a viscosity of at least about 50,000 cP (at 20° C. measured using a Bohlin Rheometer CSR 50, cone and plate measuring system CP 4°/40 mm, single shear rate 1/s) in the polymer gel supply tank into the water injection line for mixture with injection fluid is disclosed.

Abstract: A system for power supply to subsea installations and plants for production of hydrocarbons, comprising a preferably heat insulated pipeline (10), in which the possibility for internal formation of detrimental hydrates or wax deposits are present, and comprising electrical power supply cables (12, 31) for direct electrical heating of the pipeline (10), and having an electrical connection (36) to the surrounding sea at an end of the supply cable. The power supply cable (12) is further configured, in a second circuit configuration, to provide a three-phase power supply to an electrically powered motor in an subsea installation unit (11) connected to the pipeline (10), and that means (18, 19) are arranged for switching so that the three conductors (28) forming the power supply cables (12) form parallel conductors in a second circuit configuration, wherein the power supply cables (12, 31) supply power for direct heating of the pipeline (10).

Abstract: The invention provides a process for the production of an alcohol which comprises cleaving polysaccharides in a cellulosic material in an aqueous medium at a temperature of at least 45° C. using a thermophilic microorganism to yield fermentable sugars, fermenting an aqueous solution of said sugars at a temperature of at least 45° C. with a thermophilic microorganism to yield an alcohol or an alkanoate, if necessary reducing said alkanoate to yield an alcohol, and removing said alcohol from said aqueous solution.

Abstract: This invention provides a method of controlling water in a subterranean formation, said method comprising contacting said formation with a water control treatment agent which comprises an organosilane in an amount effective to reduce the water permeability of at least part of said formation. At the same time, any decrease in the overall hydrocarbon (e.g. oil) permeability of said formation is preferably minimized. The invention further provides a method of plugging or sealing a subterranean formation.

Abstract: A method of natural gas liquefaction comprising first and second nitrogen refrigerant streams, each stream under-going a cycle of compression, cooling, expansion and heating, during which the first nitrogen stream is expanded to a first, intermediate pressure and the second nitrogen stream is expanded to a second, lower pressure, and the heating occurs in one or more heat exchangers in which at least one of the expanded nitrogen streams is in heat exchanging relationship with natural gas, wherein, in at least one of said one or more heat exchangers, the first and second expanded nitrogen streams are in a heat exchanging relationship with the natural gas and both the first and second compressed nitrogen streams.

Abstract: A interferometer apparatus for studying the surface of an object, the apparatus comprising a source producing an object beam of coherent light, a source producing a reference beam which is coherent with the object beam, and a detector or a plurality of detectors arranged in a line or array, wherein the apparatus is arranged such that the object beam is diverging or substantially collimated, and wherein, in use the diverging or substantially collimated object beam is directed towards the surface of the object to produce a reflected object beam reflected from the surface of the object, the detector(s) is/are focused to a point beneath the surface of the object, and the reflected object beam is combined with the reference beam and detected by the detector(s). Also provided is a corresponding method for conducting an interferometric study of the surface of an object.

Abstract: A method of studying a surface using an interferometer, in which there is relative motion between the surface and the interferometer, the motion having a total velocity Vtot which includes a transversal or traversing component Vt and a longitudinal component Vl.

Abstract: Flexible riser systems are used to transfer hydrocarbons between a sea bed installation and a vessel floating at the sea surface. The riser is provided with a protection mechanism to protect the riser from impacts. The protection mechanism covers at least the upper part of the riser and may be retractable to an in-active position. When in operation, the riser protection mechanism is either suspended from the vessel or from a submerged turret buoy, forming part of a mooring system for the vessel. At its lower end, the protection mechanism is provided with an annular body surrounding the riser, the annular body having sufficient weight to provide a downwardly acting force in the riser protection mechanism, causing a stretch or a tension in the riser protection mechanism.