Patents by Inventor Emmanuel Desroques
Emmanuel Desroques 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: 8166812Abstract: Vibrating wire viscometers are disclosed. An example apparatus to determine the viscosity of a downhole fluid is described, the apparatus including a wire to be immersed in a downhole fluid, to vibrate when an alternating current is applied to the wire within a magnetic field, and to generate an electromotive force when vibrating within the magnetic field, the wire comprising a first resistance. The apparatus further includes a nulling circuit coupled to the wire, wherein the nulling circuit comprises a second resistance that is selectable to be substantially equal to the first resistance, and an analyzer coupled to the wire and the nulling circuit to determine the first resistance, the second resistance, and a viscosity of the downhole fluid based on the first and second resistances, at least one characteristic of the wire, and the electromotive force.Type: GrantFiled: October 14, 2009Date of Patent: May 1, 2012Assignee: Schlumberger Technology CorporationInventors: Emmanuel Desroques, Sophie Nazik Godefroy, Anthony Robert Holmes Goodwin, Christopher Harrison, Kai Hsu, Noriyuki Matsumoto
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Publication number: 20120093193Abstract: An electronic apparatus (12) of a downhole tool (9, 11) comprises a first electronic device (13) operating up to a first maximum operating temperature, a second electronic device (14) operating up to a second maximum operating temperature, a switch (15) coupling the first electronic device (13) to the second electronic device (14), the second electronic device (14) providing electrical power to the first electronic device (13). The second maximum operating temperature is higher than the first maximum operating temperature. The switch (15) is a thermally controlled switch such that the switch is only closed when a measured temperature of the first electronic device is lower than the first maximum operating temperature.Type: ApplicationFiled: April 28, 2010Publication date: April 19, 2012Inventors: Emmanuel Desroques, Sylvain Thierry
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Patent number: 8156800Abstract: Methods and apparatus to evaluate subterranean formations are described. An example method of evaluating a subterranean formation includes, obtaining a first sample from a first wellbore location. Additionally, the example method includes obtaining a second sample from a second wellbore location different than the first wellbore location. Further, the example method includes mixing the first sample with the second sample in a flowline to obtain a substantially homogenous mixture. Further still, the example method includes measuring a parameter of the mixture to evaluate the subterranean formation.Type: GrantFiled: December 24, 2008Date of Patent: April 17, 2012Assignee: Schlumberger Technology CorporationInventors: Toru Terabayashi, Emmanuel Desroques, Satoru Umemoto, Anthony Smits, Hidenori Tsuboi
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Patent number: 8136394Abstract: Methods and apparatuses for analyzing a downhole fluid are disclosed. An example method may involve the steps of admitting the downhole fluid in a test volume, controllably inducing a pressure change in the test volume based on at least one prescribed rate, measuring pressures in the test volume at a plurality of times, using the pressures measured at the plurality of times to determine a time at which an actual rate of the pressure change in the test volume deviates from the at least one prescribed rate, and detecting an occurrence of phase transition of the downhole fluid based on the determined time.Type: GrantFiled: April 17, 2009Date of Patent: March 20, 2012Assignee: Schlumberger Technology CorporationInventors: Kai Hsu, Emmanuel Desroques, Kentaro Indo
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Publication number: 20110083501Abstract: Vibrating wire viscometers are disclosed. An example apparatus to determine the viscosity of a downhole fluid is described, the apparatus including a wire to be immersed in a downhole fluid, to vibrate when an alternating current is applied to the wire within a magnetic field, and to generate an electromotive force when vibrating within the magnetic field, the wire comprising a first resistance. The apparatus further includes a nulling circuit coupled to the wire, wherein the nulling circuit comprises a second resistance that is selectable to be substantially equal to the first resistance, and an analyzer coupled to the wire and the nulling circuit to determine the first resistance, the second resistance, and a viscosity of the downhole fluid based on the first and second resistances, at least one characteristic of the wire, and the electromotive force.Type: ApplicationFiled: October 14, 2009Publication date: April 14, 2011Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: EMMANUEL DESROQUES, SOPHIE NAZIK GODEFROY, ANTHONY ROBERT HOLMES GOODWIN, CHRISTOPHER HARRISON, KAI HSU, NORIYUKI MATSUMOTO
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Publication number: 20100263442Abstract: Methods and apparatuses for analyzing a downhole fluid are disclosed. An example method may involve the steps of admitting the downhole fluid in a test volume, controllably inducing a pressure change in the test volume based on at least one prescribed rate, measuring pressures in the test volume at a plurality of times, using the pressures measured at the plurality of times to determine a time at which an actual rate of the pressure change in the test volume deviates from the at least one prescribed rate, and detecting an occurrence of phase transition of the downhole fluid based on the determined time.Type: ApplicationFiled: April 17, 2009Publication date: October 21, 2010Inventors: Kai Hsu, Emmanuel Desroques, Kentaro Indo
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Patent number: 7793712Abstract: A downhole tool, configured to be suspended in a borehole traversing an earth formation, includes a downhole data acquisition system placed in the tool body and electrically connected to an electric power generator at the formation surface. The downhole data acquisition system includes a sensor for detecting local conditions in the borehole, and a transducer for transducing the voltage of an input signal from high to low or low to high. The transducer having a gallium nitride or silicon carbide based discrete semiconductor device.Type: GrantFiled: August 23, 2007Date of Patent: September 14, 2010Assignee: Schlumberger Technology CorporationInventors: Tsutomu Yamate, Hiroshi Inoue, Jiro Takeda, Yukio Sudo, Emmanuel Desroques, Satoru Umemoto
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Publication number: 20100154529Abstract: Methods and apparatus to evaluate subterranean formations are described. An example method of evaluating a subterranean formation includes, obtaining a first sample from a first wellbore location. Additionally, the example method includes obtaining a second sample from a second wellbore location different than the first wellbore location. Further, the example method includes mixing the first sample with the second sample in a flowline to obtain a substantially homogenous mixture. Further still, the example method includes measuring a parameter of the mixture to evaluate the subterranean formation.Type: ApplicationFiled: December 24, 2008Publication date: June 24, 2010Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: TORU TERABAYASHI, EMMANUEL DESROQUES, SATORU UMEMOTO, ANTHONY SMITS, HIDENORI TSUBOI
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Publication number: 20080047751Abstract: A downhole tool, configured to be suspended in a borehole traversing an earth formation, includes a downhole data acquisition system placed in the tool body and electrically connected to an electric power generator at the formation surface. The downhole data acquisition system includes a sensor for detecting local conditions in the borehole, and a transducer for transducing the voltage of an input signal from high to low or low to high. The transducer having a gallium nitride or silicon carbide based discrete semiconductor device.Type: ApplicationFiled: August 23, 2007Publication date: February 28, 2008Applicant: Schlumberger Technology CorporationInventors: Tsutomu Yamate, Hiroshi Inoue, Jiro Takeda, Yukio Sudo, Emmanuel Desroques, Satoru Umemoto