Patents by Inventor Kjetil Johannessen
Kjetil Johannessen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11814951Abstract: An apparatus for determining properties of fluid flowing into a well includes an inflow channel providing a path for fluid to a pipe, a heater arranged to heat at least part of the fluid in the inflow channel, and a temperature sensor arranged to measure the temperature of the fluid in the inflow channel.Type: GrantFiled: May 10, 2016Date of Patent: November 14, 2023Assignee: STATOIL PETROLEUM ASInventors: Robert Aasheim, Dominik Andreas Breu, Frank Møller Nielsen, Bjarne Bugten, Kjetil Johannessen, Einar Skavland Idsø, Lisbeth Vold
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Publication number: 20220221602Abstract: A distributed acoustic sensing system for acquiring seismic data is presented. The system includes a sensing cable and an instrument float. The sensing cable is for sensing seismic waves and is suitable for use on the seabed. The instrument float includes instrumentation for acquiring seismic data. The instrument float is connectable or connected to the sensing cable via a riser cable.Type: ApplicationFiled: May 19, 2020Publication date: July 14, 2022Inventor: Kjetil JOHANNESSEN
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Patent number: 10196890Abstract: The invention relates to the use of distributed optical fibre sensors for distributed acoustic sensing, and in particular, modal analysis of distributed acoustic data obtained in-well to monitoring well integrity. By determining one or more acoustic modes corresponding to distributed speed of sound measurements within the wellbore, and analysing variations in the distributed speed of sound measurement it is possible to derive information relating to a formation and/or fluid in the wellbore.Type: GrantFiled: December 4, 2017Date of Patent: February 5, 2019Assignee: Silixa Ltd.Inventors: Daniel Finfer, Kjetil Johannessen
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Patent number: 10185049Abstract: Methods, a system and antennas are provided for transmitting or receiving signals from a hydrocarbon production well. The well comprises a well bore formed in a formation, a production liner/tubing extending axially along the well bore, and an inductive coupling disposed around the liner/tubing. The liner tubing is electrically coupled to the formation at two axially separated locations and is electrically isolated from the formation between the locations. For transmitting, an alternating current signal to the inductive coupling to induce a current in the liner/tubing, the liner tubing forming a dipole antenna that generates an electromagnetic radiation signal propagating through the formation. For receiving, the dipole antenna is exposed to an electromagnetic radiation signal propagated through the formation which induces an alternating current signal in the tubing and the current signal is detected at the inductive coupling.Type: GrantFiled: February 11, 2011Date of Patent: January 22, 2019Assignee: STATOIL PETROLEUM ASInventor: Kjetil Johannessen
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Patent number: 10175377Abstract: One aspect relates to a method of installing a transmission system in a hydrocarbon production well. The transmission system is operable for transmitting power and/or control signals down the well or for transmitting data signals back up the well. The well comprises a main well bore, a production tubing inside the main well bore and a branch off the production tubing. The branch comprises a side track tubing. The method includes: providing a sensor and/or load assembly in the branch; installing a first inductive coupler of an induced current transmission arrangement around the production tubing in the main well bore, and connecting the sensor/load assembly to the first inductive coupler via a communication link. Another aspect relates to a hydrocarbon production well installation.Type: GrantFiled: February 11, 2011Date of Patent: January 8, 2019Assignee: STATOIL PERTOLEUM ASInventor: Kjetil Johannessen
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Publication number: 20180245453Abstract: An apparatus for determining properties of fluid flowing into a well includes an inflow channel providing a path for fluid to a pipe, a heater arranged to heat at least part of the fluid in the inflow channel, and a temperature sensor arranged to measure the temperature of the fluid in the inflow channel.Type: ApplicationFiled: May 10, 2016Publication date: August 30, 2018Applicant: STATOIL PETROLEUM ASInventors: Robert AASHEIM, Dominik Andreas BREU, Frank Møller NIELSEN, Bjarne BUGTEN, Kjetil JOHANNESSEN, Einar Skavland IDSØ, Lisbeth VOLD
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Publication number: 20180087370Abstract: The invention relates to the use of distributed optical fibre sensors for distributed acoustic sensing, and in particular, modal analysis of distributed acoustic data obtained in-well to monitoring well integrity. By determining one or more acoustic modes corresponding to distributed speed of sound measurements within the wellbore, and analysing variations in the distributed speed of sound measurement it is possible to derive information relating to a formation and/or fluid in the wellbore.Type: ApplicationFiled: December 4, 2017Publication date: March 29, 2018Applicant: Silixa Ltd.Inventors: Daniel Finfer, Kjetil Johannessen
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Patent number: 9850749Abstract: The invention relates to the use of distributed optical fiber sensors for distributed acoustic sensing, and in particular, modal analysis of distributed acoustic data obtained in-well to monitoring well integrity. By determining one or more acoustic modes corresponding to distributed speed of sound measurements within the wellbore, and analyzing variations in the distributed speed of sound measurement it is possible to derive information relating to a formation and/or fluid in the wellbore.Type: GrantFiled: July 13, 2012Date of Patent: December 26, 2017Assignee: Silixa Ltd.Inventors: Daniel Finfer, Kjetil Johannessen
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Patent number: 9709768Abstract: A pipe section for coupling to one or more pipe sections in order to form an elongate tubular. The pipe section has an optical fiber extending along a longitudinal axis of the pipe section and a waveguide disposed near one end of the pipe section and is in optical communication with the optical fiber to guide light in a plane substantially perpendicular to the longitudinal axis.Type: GrantFiled: December 16, 2014Date of Patent: July 18, 2017Assignee: STATOIL PETROLEUM ASInventors: Håvard Nasvik, Kjetil Johannessen
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Publication number: 20160306131Abstract: A pipe section for coupling to one or more further pipe sections in order to form an elongate tubular, the pipe section comprising and optical fibre extending along the longitudinal direction of the pipe section, a waveguide disposed near one end of the pipe section and being in optical communication with the optical fibre, the waveguide being configured to guide light in a plane substantially perpendicular to the longitudinal axis of the pipe section.Type: ApplicationFiled: December 16, 2014Publication date: October 20, 2016Applicant: STATOIL PETROLEUM ASInventors: Håvard NASVIK, Kjetil JOHANNESSEN
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Patent number: 9353608Abstract: A method and apparatus is disclosed for controlling the flow of fluid in oil and/or gas production, involving a control device or an autonomous valve (2) operating by the Bernoulli principle and comprising a moveable disk or body (9) provided within a housing (4) for opening and closing said valve (2), involving use of a material (24) within the valve (2) that changes its properties as to shape and/or volume and/or elastic modulus when exposed to a chemical substance contained in the flow of fluid and thus altering said flow of fluid.Type: GrantFiled: March 18, 2010Date of Patent: May 31, 2016Assignee: STATOIL PETROLEUM ASInventor: Kjetil Johannessen
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Publication number: 20140163889Abstract: The invention relates to the use of distributed optical fibre sensors for distributed acoustic sensing, and in particular, modal analysis of distributed acoustic data obtained in-well to monitoring well integrity. By determining one or more acoustic modes corresponding to distributed speed of sound measurements within the wellbore, and analysing variations in the distributed speed of sound measurement it is possible to derive information relating to a formation and/or fluid in the wellbore.Type: ApplicationFiled: July 13, 2012Publication date: June 12, 2014Applicant: SILIXA LTD.Inventors: Daniel Finfer, Kjetil Johannessen
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Publication number: 20130328692Abstract: Methods, a system and antennas are provided for transmitting or receiving signals from a hydrocarbon production well. The well comprises a well bore formed in a formation, a production liner/tubing extending axially along the well bore, and an inductive coupling disposed around the liner/tubing. The liner tubing is electrically coupled to the formation at two axially separated locations and is electrically isolated from the formation between the locations. For transmitting, an alternating current signal to the inductive coupling to induce a current in the liner/tubing, the liner tubing forming a dipole antenna that generates an electromagnetic radiation signal propagating through the formation. For receiving, the dipole antenna is exposed to an electromagnetic radiation signal propagated through the formation which induces an alternating current signal in the tubing and the current signal is detected at the inductive coupling.Type: ApplicationFiled: February 11, 2011Publication date: December 12, 2013Applicant: STATOIL PETROLEUM ASInventor: Kjetil Johannessen
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Publication number: 20130321165Abstract: One aspect relates to a method of installing a transmission system in a hydrocarbon production well. The transmission system is operable for transmitting power and/or control signals down the well or for transmitting data signals back up the well. The well comprises a main well bore, a production tubing inside the main well bore and a branch off the production tubing. The branch comprises a side track tubing. The method includes: providing a sensor and/or load assembly in the branch; installing a first inductive coupler of an induced current transmission arrangement around the production tubing in the main well bore, and connecting the sensor/load assembly to the first inductive coupler via a communication link. Another aspect relates to a hydrocarbon production well installation.Type: ApplicationFiled: February 11, 2011Publication date: December 5, 2013Applicant: STATOIL PETROLEUM ASInventor: Kjetil Johannessen
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Publication number: 20130056221Abstract: A method and apparatus is disclosed for controlling the flow of fluid in oil and/or gas production, involving a control device or an autonomous valve (2) operating by the Bernoulli principle and comprising a moveable disk or body (9) provided within a housing (4) for opening and closing said valve (2), involving use of a material (24) within the valve (2) that changes its properties as to shape and/or volume and/or elastic modulus when exposed to a chemical substance contained in the flow of fluid and thus altering said flow of fluid.Type: ApplicationFiled: March 18, 2010Publication date: March 7, 2013Applicant: STATOIL ASAInventor: Kjetil Johannessen
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Patent number: 7020363Abstract: A first optical probe is used to test a planar lightwave circuit. In one embodiment, a second probe is used in combination with the first probe to test the planar lightwave circuit by sending and receiving a light beam through the planar lightwave circuit.Type: GrantFiled: December 28, 2001Date of Patent: March 28, 2006Assignee: Intel CorporationInventor: Kjetil Johannessen
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Patent number: 6987895Abstract: A planar lightwave circuit comprises a waveguide that is thermally-compensating. The waveguide comprises a cladding and a core that comprises two regions running lengthwise through the core. One region has a negative thermo-optic coefficient; the other region has a positive thermo-optic coefficient.Type: GrantFiled: July 2, 2002Date of Patent: January 17, 2006Assignee: Intel CorporationInventor: Kjetil Johannessen
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Patent number: 6970625Abstract: Optical structures useful in splitters, couplers, combiners, and switches are provided. An example optical structure has a Y-branch configuration that includes a linear taper segment and two branching waveguides. A straight section extends between the linear taper segment and the two branching waveguides to reduce losses during splitting/combining operation. The straight section may be used in Y-branch configurations having a blunt section, as well as configurations without a blunt section. Straight sections formed of a single segment and of multiple segments are shown, and the straight sections may be formed of substantially parallel outer walls or fanning-out outer walls. Further, in some embodiments, the branching waveguides form acute angles at the boundaries with the straight segment.Type: GrantFiled: July 12, 2002Date of Patent: November 29, 2005Assignee: Intel CorporationInventors: Kjetil Johannessen, Ansheng Liu, Henning Jansen
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Patent number: 6954566Abstract: An arrayed waveguide grating including a waveguide array extending between two free propagation regions is disclosed. One free propagation region is coupled to an input waveguide, and the other free propagation region is coupled to output waveguides. In an example, the input-side free propagation region has two sections that are moveable relative to one another. Movement is achieved by using, for example, a thermally responsive actuator that moves the input waveguide a desired distance to compensate for a temperature change. An arm formed of a low thermal expansion coefficient metal may be used as a thermally responsive actuator moving a substrate. In another example, both the input side and the output side free propagation regions have sections moveable relative to one another and, therefore, less movement is required to correct for thermal variations. An N×N arrayed waveguide grating may also be formed.Type: GrantFiled: July 25, 2002Date of Patent: October 11, 2005Assignee: Intel CorporationInventor: Kjetil Johannessen
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Patent number: 6864512Abstract: A semiconductor waveguide is disclosed which includes a substrate coated with a cladding. A core is embedded in the cladding. The core includes a plurality of discreet stacked layers of core material surrounded by cladding material. The cladding and core layers each include silica and silicon nitride with the core layers having a higher nitrogen content than the cladding material. The core is fabricated by carefully manipulating the process parameters of a PECVD process.Type: GrantFiled: May 22, 2003Date of Patent: March 8, 2005Assignee: Intel CorporationInventor: Kjetil Johannessen