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).

  • Patent number: 10196890
    Abstract: 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: Grant
    Filed: December 4, 2017
    Date of Patent: February 5, 2019
    Assignee: Silixa Ltd.
    Inventors: Daniel Finfer, Kjetil Johannessen
  • Patent number: 10185049
    Abstract: 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: Grant
    Filed: February 11, 2011
    Date of Patent: January 22, 2019
    Assignee: STATOIL PETROLEUM AS
    Inventor: Kjetil Johannessen
  • Patent number: 10175377
    Abstract: 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: Grant
    Filed: February 11, 2011
    Date of Patent: January 8, 2019
    Assignee: STATOIL PERTOLEUM AS
    Inventor: Kjetil Johannessen
  • Publication number: 20180245453
    Abstract: 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: Application
    Filed: May 10, 2016
    Publication date: August 30, 2018
    Applicant: STATOIL PETROLEUM AS
    Inventors: Robert AASHEIM, Dominik Andreas BREU, Frank Møller NIELSEN, Bjarne BUGTEN, Kjetil JOHANNESSEN, Einar Skavland IDSØ, Lisbeth VOLD
  • Publication number: 20180087370
    Abstract: 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: Application
    Filed: December 4, 2017
    Publication date: March 29, 2018
    Applicant: Silixa Ltd.
    Inventors: Daniel Finfer, Kjetil Johannessen
  • Patent number: 9850749
    Abstract: 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: Grant
    Filed: July 13, 2012
    Date of Patent: December 26, 2017
    Assignee: Silixa Ltd.
    Inventors: Daniel Finfer, Kjetil Johannessen
  • Patent number: 9709768
    Abstract: 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: Grant
    Filed: December 16, 2014
    Date of Patent: July 18, 2017
    Assignee: STATOIL PETROLEUM AS
    Inventors: Håvard Nasvik, Kjetil Johannessen
  • Publication number: 20160306131
    Abstract: 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: Application
    Filed: December 16, 2014
    Publication date: October 20, 2016
    Applicant: STATOIL PETROLEUM AS
    Inventors: Håvard NASVIK, Kjetil JOHANNESSEN
  • Patent number: 9353608
    Abstract: 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: Grant
    Filed: March 18, 2010
    Date of Patent: May 31, 2016
    Assignee: STATOIL PETROLEUM AS
    Inventor: Kjetil Johannessen
  • Publication number: 20140163889
    Abstract: 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: Application
    Filed: July 13, 2012
    Publication date: June 12, 2014
    Applicant: SILIXA LTD.
    Inventors: Daniel Finfer, Kjetil Johannessen
  • Publication number: 20130328692
    Abstract: 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: Application
    Filed: February 11, 2011
    Publication date: December 12, 2013
    Applicant: STATOIL PETROLEUM AS
    Inventor: Kjetil Johannessen
  • Publication number: 20130321165
    Abstract: 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: Application
    Filed: February 11, 2011
    Publication date: December 5, 2013
    Applicant: STATOIL PETROLEUM AS
    Inventor: Kjetil Johannessen
  • Publication number: 20130056221
    Abstract: 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: Application
    Filed: March 18, 2010
    Publication date: March 7, 2013
    Applicant: STATOIL ASA
    Inventor: Kjetil Johannessen
  • Patent number: 7020363
    Abstract: 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: Grant
    Filed: December 28, 2001
    Date of Patent: March 28, 2006
    Assignee: Intel Corporation
    Inventor: Kjetil Johannessen
  • Patent number: 6987895
    Abstract: 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: Grant
    Filed: July 2, 2002
    Date of Patent: January 17, 2006
    Assignee: Intel Corporation
    Inventor: Kjetil Johannessen
  • Patent number: 6970625
    Abstract: 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: Grant
    Filed: July 12, 2002
    Date of Patent: November 29, 2005
    Assignee: Intel Corporation
    Inventors: Kjetil Johannessen, Ansheng Liu, Henning Jansen
  • Patent number: 6954566
    Abstract: 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: Grant
    Filed: July 25, 2002
    Date of Patent: October 11, 2005
    Assignee: Intel Corporation
    Inventor: Kjetil Johannessen
  • Patent number: 6864512
    Abstract: 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: Grant
    Filed: May 22, 2003
    Date of Patent: March 8, 2005
    Assignee: Intel Corporation
    Inventor: Kjetil Johannessen
  • Patent number: 6842572
    Abstract: A device that compensates for focal point drift of transmitted optical beams caused by ambient temperature changes by using a position adjuster to adjust the alignment of channels of a target planar lightwave circuit (“PLC”). The channels of the target PLC may taper open. In one implementation, the device may also use a birefringence plate to compensate for polarization dependent focal point drift.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: January 11, 2005
    Assignee: Intel Corporation
    Inventor: Kjetil Johannessen
  • Publication number: 20040060324
    Abstract: A first waveguide and a second waveguide are aligned by applying an alignment dot on end surfaces of the cores of first and second waveguides. The alignment dots are positioned in close proximity to one another, and are melted together. Surface tension pulls the first and second waveguides into alignment.
    Type: Application
    Filed: September 30, 2003
    Publication date: April 1, 2004
    Inventor: Kjetil Johannessen