Patents by Inventor Hallgeir Melbo
Hallgeir Melbo 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: 8437975Abstract: The invention relates to a monitoring system and method for accumulator banks including at least two pressure accumulators, the accumulator bank is coupled to a device and being adapted to provide a pressurized fluid into the device at pressure reductions in said device. The monitoring system comprises at least one sensor for detecting a chosen parameter in the accumulator bank at chosen intervals of time, and a recording unit for recording the sampled measured parameters, a storage device for storing predetermined characteristic information related to the pressure development in the accumulator bank during pressure reductions at the device and representing different numbers of active accumulators in the accumulator bank, and calculation means for comparing the recorded measured parameters with the stored characteristic information, and determining from this comparison the number of active accumulators in the accumulator bank.Type: GrantFiled: October 19, 2007Date of Patent: May 7, 2013Assignee: Aker Subsea ASInventors: Hallgeir Melbo, Klas Goran Eriksson, Kristin Falk
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Publication number: 20100299119Abstract: The present invention relates to a system and method for monitoring subsea equipment performance and for providing early warning for equipment maintenance, comprising at least one sensor coupled to said equipment and arranged to measure at least one performance indicator value and a calculation unit for sampling the measured indicator values at a chosen rate, and from the sampled data estimating a likely future development of the sampled value and estimating the time for the passing of a chosen threshold value, the threshold value being a critical value requiring repair of replacements of said equipment, the system being adapted to provide a signal indicating the calculated time of repair/replacement.Type: ApplicationFiled: October 19, 2007Publication date: November 25, 2010Applicant: AKER SUBSEA ASInventors: Klas Goran Erikson, Hallgeir Melbo
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Publication number: 20100294383Abstract: The invention relates to a monitoring system and method for accumulator banks including at least two pressure accumulators, the accumulator bank is coupled to a device and being adapted to provide a pressurized fluid into the device at pressure reductions in said device. The monitoring system comprises at least one sensor for detecting a chosen parameter in the accumulator bank at chosen intervals of time, and a recording unit for recoding the sampled measured parameters, a storage device for storing predetermined characteristic information related to the pressure development in the accumulator bank during pressure reductions at the device and representing different numbers of active accumulators in the accumulator bank, and calculation means for comparing the recorded measured parameters with the stored characteristic information, and determining from this comparison the number of active accumulators in the accumulator bank.Type: ApplicationFiled: October 19, 2007Publication date: November 25, 2010Applicant: AKER SUBSEA ASInventors: Hallgeir Melbo, Klas Goran Erikson, Kristin Falk
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Patent number: 7526407Abstract: A method for detecting water breakthrough in a well production. A model, of which the accuracy is known, will receive three of the four following parameters: inlet pressure, inlet temperature, outlet pressure, outlet temperature. The model includes a three-phase flash model including heat of evaporation of water and partial pressure of water with or without dissolved components lowering the vapor pressure such as salt and/or alcohol. Based on the three parameters the model computes the fourth parameter, whereupon the actual fourth parameter is measured and compared to the computed fourth parameter. If the deviation between the measured and the computed parameter is considerably larger than that which can be explained from the level of confidence of the selected model and uncertainty of measurement, it can be concluded that a water breakthrough has actually occurred.Type: GrantFiled: November 5, 2004Date of Patent: April 28, 2009Assignee: ABB ASInventors: Bjørn Øyvind Bringedal, Egil Birkemoe, Svein Arne Morud, Hallgeir Melbø
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Publication number: 20070276603Abstract: A method for detecting water breakthrough in a well production. A model, of which the accuracy is known, will receive three of the four following parameters: inlet pressure, inlet temperature, outlet pressure, outlet temperature. The model includes a three-phase flash model including heat of evaporation of water and partial pressure of water with or without dissolved components lowering the vapor pressure such as salt and/or alcohol. Based on the three parameters the model computes the fourth parameter, whereupon the actual fourth parameter is measured and compared to the computed fourth parameter. If the deviation between the measured and the computed parameter is considerably larger than that which can be explained from the level of confidence of the selected model and uncertainty of measurement, it can be concluded that a water breakthrough has actually occurred.Type: ApplicationFiled: November 5, 2004Publication date: November 29, 2007Applicant: ABB ASInventors: Bjørn Bringedal, Egil Birkemoe, Svein Morud, Hallgeir Melbo
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Patent number: 6944563Abstract: A method and a system to provide allocation of mixed flow to individual sources in oil and gas production systems by measuring mixed flow; analyzing the composition; accessing the data for the mixed flows; and calculating the flow from each source with an allocation algorithm using the mixed flow, the analyzed composition and the composition of at least one source.Type: GrantFiled: May 9, 2003Date of Patent: September 13, 2005Assignee: ABB Research Ltd.Inventors: Hallgeir Melbø, Robert Anton Bernard van der Geest, Svein Arne Morud, Bjørn Øyvind Bringedal
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Publication number: 20040225464Abstract: A method and a system to provide allocation of mixed flows back to individual sources in an oil and/or gas production system. The method is independent of sub sea on-line measurements. Instead the method uses comparably inexpensive topside equipment for compositional allocation of the flows. The method comprises the use of an on-line allocation algorithm. The method is suitable where improved reliability of flow allocation back to wells and reservoirs is needed. The allocated flow may be used to calculate and estimate the remaining volumes in a reservoir.Type: ApplicationFiled: May 9, 2003Publication date: November 11, 2004Inventors: Hallgeir Melbo, Robert Anton Bernard van der Geest, Svein Arne Morud, Bjorn Oyvind Bringedal