Patents Assigned to Norsk Hydro
  • Patent number: 7819196
    Abstract: A method and a device in connection with an actuator intended for use in connection with a fluid flow or fluid reservoir, in particular an actuator that is designed to be used in connection with a drainage pipe (8) for the production of oil and/or gas in an oil and/or gas reservoir. An osmotic cell (9) is used to operate the actuator (10). The osmotic cell is placed in the fluid flow, whereby the necessary force and motion for the actuator (10) to adjust or drive a fluid control device or valve are achieved by utilizing the osmotic pressure difference between the solution in the cell (9) and an external fluid flow/reservoir in relation to the cell.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: October 26, 2010
    Assignee: Norsk Hydro ASA
    Inventor: Haavard Aakre
  • Patent number: 7819073
    Abstract: A method for coordinating a floating wind turbine installation. The wind turbine installation includes a buoyant body (1), a tower (2) arranged over the buoyant body, a generator (3) mounted on the tower which is rotatable in relation to the wind direction and fitted with a wind rotor (4), and an anchor line arrangement (5) connected to anchors or anchor points on the sea bed. Static heeling, ?s—max, at full wind load on the wind turbine is as low as possible, but preferably less than 8 degrees, and all eigenperiods for the installation are outside the waves' period range. The eigenperiod in pitch, T05 (roll, T04), is preferably less than 80% of the T03 eigenperiod in heave. Moreover, the ratio between T03 and T05 is not close to 0.5 or 1.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: October 26, 2010
    Assignee: Norsk Hydro ASA
    Inventors: Dagfinn Sveen, Finn Gunnar Nielsen, Tor David Hanson
  • Patent number: 7812611
    Abstract: A method for determining electrical properties of a submarine petroleum fluid-bearing formation (1) under overburden geological layers (2) of thickness (s) under a seafloor (3) of a sea. The method includes: *arranging one or more transmitter antennas (9) in the sea, and arranging one or more electromagnetic receivers (8) in the sea, *the sea having a shallow sea depth (d) of 50-350 meters; *using the transmitter antenna (9) transmitting electromagnetic signals (10) of one or more pulses (11) having frequency of very low frequency between 0.01 Hz and 0.
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: October 12, 2010
    Assignee: Norsk Hydro ASA
    Inventors: Svein Erling Johnstad, Brian Anthony Farrelly
  • Patent number: 7803233
    Abstract: A device or arrangement for cleaning a pipe separator (1) in which the separator body (2) includes an extended, tubular body with an inlet (4) and an outlet (5) having essentially the same diameter as the separator body. At the outlet, there is a bend or a loop (3) designed to maintain a fluid level in the separator. Just before the bend, there is an outlet (6) with an outlet pipe (9) for conducting fluid, e.g. water, from the separator. Sand or other particulate materials introduced into the outlet (6) are returned, using a pump (7) arranged on the outlet pipe (9), together with the fluid from the outlet, to the separator after the bend (3) by means of reversal with a valve (8) via a return pipe (11). In connection with the outlet (6), there is a flushing device having a pipe loop (12) connected to the outlet pipe (9) for the return of fluid from the outlet to the nozzles (14) arranged in the outlet.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: September 28, 2010
    Assignee: Norsk Hydro ASA
    Inventors: Per Eivind Gramme, Gunnar Hannibal Lie
  • Publication number: 20100225107
    Abstract: Gas tight tubular joint or connection, particularly related to mono diameter tubular body in the form of a pipe or casing being used in connection with the production of oil and/or gas, where the pipes or casings are manufactured from tubular sections and where the tubular sections, after being interconnected at their respective ends, are finally formed by expansion. The pipes or casings are formed from at least two, one outer and one inner tubular section. The ends of each of said respective section is overlapping the next, succeeding tubular section, whereby one or more of the inner, intermediate or outer tubular sections are of different metallic materials and/or different thickness, and under the deformation process, is plastified or plastically deformed in the overlapping zone forming a metallic seal and thereby providing gas pressure integrity between the inside and outside of the expanded tubular pipe/casing.
    Type: Application
    Filed: February 16, 2007
    Publication date: September 9, 2010
    Applicant: NORSK HYDRO ASA
    Inventor: Steinar Tverlid
  • Patent number: 7784485
    Abstract: The present invention relates to a plant for storing gas under pressure. The plant includes at least one basin filled with a liquid, one or more pressure vessels located in the basin for storing the gas including interconnecting piping and connections to a gas supply and a gas discharge network, an anchoring system for supporting the vessels, a cover with a slanted surface on the underside for covering the basin which will lead any gas leak occurring in the basin towards and through a vent, and at least one gas detection equipment located in the vent. The plant is especially suitable for storing compressed gaseous hydrogen and can be connected to a hydrogen fuel replenishment system.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: August 31, 2010
    Assignee: Norsk Hydro ASA
    Inventors: Jan Schelling, Pål Kittilsen, Sandra Hennie Nilsen, Leif Kåre Grønstad
  • Patent number: 7775142
    Abstract: The present invention concerns a method and a device for processing calcinated carbon bodies such as anodes or cathodes for use in connection with electrolytic production of aluminum. The carbon bodies are processed using a rotating processing tool that includes a mainly circular disc with cutting edges mounted at its periphery. The cutting edges may be made of polycrystalline diamond (PCD) or an equivalent material. Thus, it is possible to create slots in calcinated carbon bodies in an efficient manner with low tool wear.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: August 17, 2010
    Assignees: Norsk Hydro ASA, Lyng Drilling AS
    Inventors: Oddvin Nesse, Jan Egil Pallin, Hans Seehuus, Jens Bugge Hatlevoll
  • Patent number: 7730942
    Abstract: A method and equipment for reducing or avoiding multiple dispersions in fluid flows each having two or more non-mixable fluid components with different specific gravities and viscosities, in particular fluid flows of oil, gas and water from different oil/gas production wells (B1-B8) in formations beneath the surface of the earth or sea. The fluid flow from each well (B1-B8), depending on whether it is oil-continuous (o/w) or water-continuous (w/o), is fed to a transport pipeline (T) so that the oil-continuous fluid flows (o/w) are supplied to the transport line (T) first and the water-continuous fluid flows (w/o) second, or the two fluid flows (o/w, w/o) are fed to two separate transport lines (T1, T2). In a preferred embodiment, the two separate transport lines (T1, T2) may be connected to a common transport line (T); the two fluid flows (o/w, w/o) are mixed before further transport and any subsequent separation in a separator.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: June 8, 2010
    Assignee: Norsk Hydro ASA
    Inventors: Per Eivind Gramme, Gunnar Hannibal Lie
  • Patent number: 7617940
    Abstract: A device in connection with a separator for cleaning or reaming such a separator. The separator includes a tank or a body (2) with an inlet and at least one outlet (5, 6). A transport pipeline (3) is connected to the inlet for the supply of fluid that is to be separated in the separator. The transport pipeline (3) extends from the inlet through the separator body (2). Part (6) of the line that is located inside the separator body (2) is provided with perforations or slits (7) so that fluid that arrives in the transport pipeline (3) flows into the tank through the perforations/slits (7). Mechanical equipment for cleaning the transport pipeline (3) is designed to be sent from a magazine through the separator body (2) and on via a pipe loop back to the magazine.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: November 17, 2009
    Assignee: Norsk Hydro ASA
    Inventors: Per Eivind Gramme, Gunnar Hannibal Lie
  • Patent number: 7611633
    Abstract: A method for separation of fluid, in particular oil, gas and water, in connection with the extraction of such a fluid from formations under the surface of the earth or the sea bed. The fluid is transported in a supply pipe or transport pipe (4) to a separator (1) in the form of a tubular separator body, a gravitation tank or similar. The separated components, water and oil, are passed out of the separator separately via outlet pipes. The fluid upstream of the separator (1) is subjected to shear forces so that the drops in the supply flow are torn up to form drops that are so small that the interface generally becomes new and “uncontaminated” by surfactants. The shear forces are supplied by a phase inversion device (6) in the form of a valve or similar. Water can expediently be added to the fluid upstream of the phase inversion device (6) to achieve the desired phase inversion.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: November 3, 2009
    Assignee: Norsk Hydro ASA
    Inventors: Per Gramme, Gunnar Hannibal Lie
  • Publication number: 20090229202
    Abstract: A half-shell for forming a section of a thermal break door or window frame is described. The half-shell has a seat which is configured so as to receive a portion of a heat-insulating body and lock this heat-insulating body with respect to the half-shell, and a tooth, wherein said seat comprises a bottom surface and two side walls, wherein one of said two side walls is formed by said tooth which can be bent towards the bottom of the seat so as to lock the heat-insulating body in position, wherein said tooth comprises a first snug projecting towards said seat, and wherein said tooth also comprises a second snug projecting towards the seat and designed to penetrate into said heat-insulating body.
    Type: Application
    Filed: October 3, 2008
    Publication date: September 17, 2009
    Applicant: NORSK HYDRO ASA
    Inventor: Maurizio Dampierre
  • Publication number: 20090226660
    Abstract: A body of heat-insulating material designed to be assembled with two half-shells made of metallic material, so as to form a section configured to produce a thermal break door or window frame, said body of heat-insulating material comprising a first plastic material having a first degree of compressibility, characterized in that it also comprises a second material with a second degree of compressibility, wherein said second degree of compressibility is greater than said first degree of compressibility.
    Type: Application
    Filed: October 3, 2008
    Publication date: September 10, 2009
    Applicant: NORSK HYDRO ASA
    Inventor: Maurizio Dampierre
  • Patent number: 7559244
    Abstract: An arrangement or provision of a sensor or probe (11) for the measuring of a physical or chemical condition such as pressure, temperature or corrosion in a pipe (1, 2), tank or tubular container being provided with a connection such as a flange connection (3,4) between the pipe, tank or tubular sections. The sensor or probe (11) is provided in conjunction with a gasket such as a ring gasket (8) which is used as a seal between the pipe (1, 2), tank or tubular sections. The probe or sensor element is provided on an inner face of the ring gasket facing the inside of the pipe, tank or tubular sections. Electrical connectors (16) for transforming signals from the probe or sensor element (11) are provided in a bore or bores (14) that stretches from the sensor or probe and through the gasket or ring gasket (8) and to the outside of the gasket.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: July 14, 2009
    Assignee: Norsk Hydro ASA
    Inventors: Haakon Høimyr, Steinar Wighus
  • Patent number: 7559975
    Abstract: A process in connection with a pipe (1) for transforming a dispersed gas/liquid flow into laminar stratified flow. The solution involves a first set of stationary guide blades (6) arranged in the pipe (1) and designed to rotate the liquid/gas flow. The pipe (1) is, in turn, connected to a second pipe (2) with the same or a different diameter and, in the transition between the pipe (1) and the second pipe (2), there is a second set of blades or a device (8) that is designed to stop the rotation of the gas. The natural flow pattern of the gas/liquid in the second pipe (2) then becomes stratified over a predefined distance.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: July 14, 2009
    Assignee: Norsk Hydro ASA
    Inventor: Per Gramme
  • Publication number: 20090095554
    Abstract: Roll over protection system for a passenger car, comprising at least one extended top unit (1) having substantially vertical beam(s) or tube(s) terminated or bridged by a connecting member (7) at their top ends. Initially in a crash, the upper part of the top unit only deforms by being bent backwards, thus creating a skid-plate against the ground at the same time as impairing the survival room negligibly only.
    Type: Application
    Filed: July 18, 2005
    Publication date: April 16, 2009
    Applicant: NORSK HYDRO ASA
    Inventor: Roald Helland Pedersen
  • Patent number: 7516794
    Abstract: A pipe separator for the separation of fluids, for example the separation of oil, gas and water in connection with the extraction and production of oil and gas from formations beneath the sea bed. The pipe separator includes a pipe-shaped separator body (1) with an inlet and outlet that principally corresponds to a transport pipe (4, 7) to which the pipe separator is connected. The pipe separator further includes a pipe bend or loop (2) arranged in the pipe separator or in connection with its outlet to form a downstream fluid seal in relation to the pipe separator body (1), which is designed to maintain a fluid level in the pipe separator, but which also allows the pipe separator (1) and the loop (2) to be pigged.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: April 14, 2009
    Assignee: Norsk Hydro ASA
    Inventors: Per Eivind Gramme, Ivar Haukom
  • Patent number: 7494553
    Abstract: A method is provided of determining a heat treatment to apply to a structural member so as to modify the deformation behavior of the structural member when subjected to an applied stress. The method includes first simulating the deformation behavior of the structural member when subjected to the applied stress. The effect of at least one heat treatment upon a part of the structural member is then simulated so as to determine a heat treatment to apply to the part of the structural member so as to produce a modified deformation behavior.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: February 24, 2009
    Assignee: Norsk Hydro ASA
    Inventors: Børge Bjørneklett, Ole Runar Myhr, Tor Arne Stjern
  • Patent number: 7490671
    Abstract: A pipe separator is for separation of fluids, for example separation of oil, gas and water in connection with extraction and production of oil and gas from formations under a sea bed. The pipe separator comprises an extended, tubular separator body having a diameter at inlet and outlet ends that is mainly equal to or slightly greater than a diameter of a transport pipe to which the separator body is connected. A cyclone is arranged upstream of the separator body for separation of any gas present. An electrostatic coalescer is incorporated in and constitutes an integrated part of the separator body.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: February 17, 2009
    Assignee: Norsk Hydro ASA
    Inventors: Per Gramme, Gunnar Hannibal Lie
  • Patent number: 7470354
    Abstract: A method for electrolytic production of aluminium metal from an electrolytic (3) including aluminium oxide, by performing electrolysis, with at least one inert anode (1) and at least one cathode (2) thus forming part of an electorwinning cell. The anode evolves oxygen gas and the cathode has aluminium discharged onto it in the electrolysis process, where the oxygen gas enforces an electrolyte flow pattern. The oxygen gas is directed to flow into anode grooves and is drained away from the interpolar room, thereby establishing an electrolyte flow pattern between the electrodes (1) and (2) and between over the anodes (1). The invention also concerns and anode assembly and an electrowinning cell.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: December 30, 2008
    Assignee: Norsk Hydro ASA
    Inventors: Odd-Arne Lorentsen, Ole-Jacob Siljan, Stein Julsrud
  • Patent number: 7465379
    Abstract: An arrangement of one or more structural elements (3) in a cell lining, in particular for use as a side lining in aluminum electrolysis cells (5). The design of and choice of materials for side linings can be fitted in existing electrolysis cells, plus the design and production of the stated material is selected in view of the main purpose of the material, which is to utilize it for the purpose of energy recovery in electrolysis cells. Possible materials for use in the elements and production of these elements are disclosed.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: December 16, 2008
    Assignees: Cronus Energy AS, Norsk Hydro ASA
    Inventor: Ole-Jacob Siljan