Patents by Inventor Terje Sira
Terje Sira 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: 10556210Abstract: There is provided a process for the prevention or reduction of surge wave instabilities during the transport in a flowline of a three phase gas condensate comprising a gas phase, an aqueous phase and a condensate phase, characterized in that a dispersing agent is added to the three phase gas condensate which is able to disperse the aqueous phase in the condensate phase or the condensate phase in the aqueous phase, and a means for the prevention or reduction of surge wave instabilities during the transportation of a three phase gas condensate.Type: GrantFiled: February 24, 2014Date of Patent: February 11, 2020Assignee: STATOIL PETROLEUM ASInventors: Magnus Nordsveen, Robert Orr, Bjørn Meland, Terje Sira
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Patent number: 10337317Abstract: A method for monitoring precipitation of a wax component in a hydrocarbon fluid stream i) using a labelled wax introduced in a fluid transport system at one in-flow point and measuring its absolute or relative concentration at one out-flow point is provided. A method for generating a labelled wax, and the use of a labelled wax is also provided.Type: GrantFiled: September 18, 2015Date of Patent: July 2, 2019Assignee: Institutt for EnergiteknikkInventors: Martin Foss, Tor Bjørnstad, Terje Sira
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Patent number: 10151198Abstract: An apparatus for tracer based flow measurement may include a tracer chamber for installation in and/or on a production tubing, wherein the tracer chamber is for holding tracer and is arranged to be linked, in use, to the pressure in an annulus about the production tubing. The tracer chamber may include an outlet for fluid communication between the tracer chamber and the fluid within the production tubing, whereby tracer is released from the tracer chamber into the production tubing in accordance with a pressure differential between the annulus and the production tubing.Type: GrantFiled: March 15, 2013Date of Patent: December 11, 2018Assignee: RESMAN ASInventors: Terje Sira, Tor Bjørnstad
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Publication number: 20170292369Abstract: The present invention provides a method for monitoring precipitation of at least one wax component from a hydrocarbon-containing fluid stream during the flow of said fluid stream through a fluid transport system having at least one in-flow point and at least one out-flow point. The method comprises: i) introducing at least one labelled wax into said hydrocarbon-containing fluid stream at at least one in-flow point; and ii) measuring the relative or absolute concentration of said labelled wax in at least one sample taken at at least one out-flow point. The method may comprise sampling and analysing wax components from the hydrocarbon-containing fluid, identifying suitable wax components and generating labelled waxed based upon such components. Methods of generating labelled waxes and their uses are provided, along with corresponding methods for asphaltenes.Type: ApplicationFiled: September 18, 2015Publication date: October 12, 2017Inventors: Martin FOSS, Tor BJØRNSTAD, Terje SIRA
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Publication number: 20160367957Abstract: There is provided a process for the prevention or reduction of surge wave instabilities during the transport in a flowline of a three phase gas condensate comprising a gas phase, an aqueous phase and a condensate phase, characterized in that a dispersing agent is added to the three phase gas condensate which is able to disperse the aqueous phase in the condensate phase or the condensate phase in the aqueous phase, and a means for the prevention or reduction of surge wave instabilities during the transportation of a three phase gas condensate.Type: ApplicationFiled: February 24, 2014Publication date: December 22, 2016Applicant: STATOIL PETROLEUM ASInventors: Magnus NORDSVEEN, Robert ORR, Bjørn MELAND, Terje SIRA
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Publication number: 20160010454Abstract: An apparatus for tracer based flow measurement may include a tracer chamber for installation in and/or on a production tubing, wherein the tracer chamber is for holding tracer and is arranged to be linked, in use, to the pressure in an annulus about the production tubing. The tracer chamber may include an outlet for fluid communication between the tracer chamber and the fluid within the production tubing, whereby tracer is released from the tracer chamber into the production tubing in accordance with a pressure differential between the annulus and the production tubing.Type: ApplicationFiled: March 15, 2013Publication date: January 14, 2016Applicant: Institutt for EnergiteknikkInventors: Terje Sira, Tor Bjørnstad
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Patent number: 7503186Abstract: In a method of condensing an unprocessed well stream from an offshore gas or gas condensate field the well stream taken from one or more wellheads is cooled and directly expanded, isentropically, or near isentropically, to a state in which the pressure is close to that of a storage tank. Part of the well stream is condensed and condensed fractions thereof is drawn off the expander and fed to the storage tank along with condensation products from the exit of the expander. Hence, without any preprocessing, a condensed well stream product is produced which comprises a mixture of liquids and solids which is collected in the storage tank for transport therefrom to land. A system for carrying out the method is also disclosed. The invention makes the condensation of an unprocessed well stream possible without any preprocessing thereof, such as extraction of solid particles, e.g. sands, removal of water, cleaning or drying.Type: GrantFiled: December 23, 2003Date of Patent: March 17, 2009Assignee: Institutt for EnergiteknikkInventors: Istvan Bencze, Jan Bosio, Guttorm O. Endrestøl, Terje Sira, Dag Thomassen
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Patent number: 7469597Abstract: The present invention relates to a method for measurement of total phase volumes in multiphase flow in pipelines. The multiphase fractions comprise hydrocarbon liquid phase and/or water phase and/or transported solid phases. One or more tracers are injected into the pipeline, preferably at the inlet and the tracer concentration(s) are measured as a function of time at the point of injection and at one or more points of measurements downstream from the point of injection. Further, the mean residence time(s) are measured for transport of the injected tracer(s) from the point of injection to said one or more point(s) measurements. The liquid phase volume(s) are calculated based on the amount of injected tracers and the measured tracer concentrations in each phase and the mean residence time.Type: GrantFiled: November 4, 2005Date of Patent: December 30, 2008Assignee: Statoil ASAInventors: Gunnar Flaten, Terje Sira
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Publication number: 20080092666Abstract: The present invention relates to a method for measurement of total phase volumes in multiphase flow in pipelines. The multiphase fractions comprise hydrocarbon liquid phase and/or water phase and/or transported solid phases. One or more tracers are injected into the pipeline, preferably at the inlet and the tracer concentration(s) are measured as a function of time at the point of injection and at one or more points of measurements downstream from the point of injection. Further, the mean residence time(s) are measured for transport of the injected tracer(s) from the point of injection to said one or more point(s) measurements. The liquid phase volume(s) are calculated based on the amount of injected tracers and the measured tracer concentrations in each phase and the mean residence time.Type: ApplicationFiled: November 4, 2005Publication date: April 24, 2008Applicant: STATOIL ASAInventors: Gunnar Flaten, Terje Sira
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Publication number: 20060196226Abstract: In a method of condensing an unprocessed well stream from an offshore gas or gas condensate field the well stream taken from one or more wellheads is cooled and directly expended, isentropically, or near isentropically, to a state in which the pressure is close to that of a storage tank. Part of the well stream is condensed and condensed fractions thereof is drawn off the expander and fed to the storage tank along with condensation products from the exit of the expander. Hence, without any preprocessing, a condensed well stream product is produced which comprises a mixture of liquids and solids which are collected in the storage tank for transport therefrom to land. A system for carrying out the method is also disclosed. The invention makes the condensation of an unprocessed well stream possible without any preprocessing thereof, such as extraction of solid particles, e.g. sands, removal of water, cleaning or drying.Type: ApplicationFiled: December 23, 2003Publication date: September 7, 2006Inventors: Istvan Bencze, Jan Bosio, Guttorm Endrestol, Terje Sira, Dag Thomassen