Patents by Inventor Takeo Fujihara
Takeo Fujihara 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: 9910188Abstract: A technique facilitates the accumulation and analysis of data related to a subterranean formation. An arrangement of different types of sensors is mounted on a collar utilized in accumulating data on the subterranean formation. The sensors are operable in combination to improve the image quality of data obtained with respect to the subterranean formation. Certain applications utilize an arrangement of sensors comprising at least one of each of an electromagnetic sensor and an ultrasonic pulse-echo transducer. A stabilizer or stabilizers may be used to precisely orient and position the sensors within a wellbore.Type: GrantFiled: September 9, 2014Date of Patent: March 6, 2018Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Henri-Pierre Valero, Emmanuel Legendre, Takeo Fujihara
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Patent number: 9513372Abstract: An example method for automatically characterizing an echo contained in an ultrasonic signal generated with an ultrasonic transducer can include receiving data corresponding to the ultrasonic signal, calculating an energy ratio of the ultrasonic signal and localizing the echo using the energy ratio. The method can include windowing a portion of the ultrasonic signal around the localized echo and calculating a Fast Fourier Transform (FFT) and a Hilbert envelop of the windowed portion. The method can include estimating M echo parameters from the FFT and the Hilbert envelope of the windowed portion, where each of the M parameter vectors includes a plurality of echo parameters, calculating M parametric echo models based on each of the M echo parameter vectors and iteratively minimizing a difference between the windowed portion of the ultrasonic signal and a sum of the M parametric echo models.Type: GrantFiled: July 17, 2013Date of Patent: December 6, 2016Assignee: Schlumberger Technology CorporationInventors: Henri-Pierre Valero, Adam Pedrycz, Takeo Fujihara
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Patent number: 9476293Abstract: Methods and related systems are described relating to a sealed acoustic transducer assembly for use in a wellbore is provided. A tool body is deployed in the wellbore, having a groove and a sealed acoustic transducer assembly removeably mounted therein. The transducer assembly includes an acoustic transducer element, and an elongated fluid filled sealed container housing the transducer element. The container includes flexible portions along the length of the container which allows for volume changes when exposed to changes in external pressure and/or temperature. Acoustic measurements downhole are made using the transducer element.Type: GrantFiled: August 30, 2012Date of Patent: October 25, 2016Assignee: Schlumberger Technology CorporationInventors: Hiroshi Nakajima, Toshihiro Kinoshita, Takeo Fujihara, Yasuo Kanaya
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Publication number: 20160209543Abstract: A technique facilitates the accumulation and analysis of data related to a subterranean formation. An arrangement of different types of sensors is mounted on a collar utilized in accumulating data on the subterranean formation. The sensors are operable in combination to improve the image quality of data obtained with respect to the subterranean formation. Certain applications utilize an arrangement of sensors comprising at least one of each of an electromagnetic sensor and an ultrasonic pulse-echo transducer. A stabilizer or stabilizers may be used to precisely orient and position the sensors within a wellbore.Type: ApplicationFiled: September 9, 2014Publication date: July 21, 2016Applicant: Schlumberger Canada LimitedInventors: Henri-Pierre Valero, Emmanuel Legendre, Takeo Fujihara
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Publication number: 20140204700Abstract: An example method for automatically characterizing an echo contained in an ultrasonic signal generated with an ultrasonic transducer can include receiving data corresponding to the ultrasonic signal, calculating an energy ratio of the ultrasonic signal and localizing the echo using the energy ratio. The method can include windowing a portion of the ultrasonic signal around the localized echo and calculating a Fast Fourier Transform (FFT) and a Hilbert envelop of the windowed portion. The method can include estimating M echo parameters from the FFT and the Hilbert envelope of the windowed portion, where each of the M parameter vectors includes a plurality of echo parameters, calculating M parametric echo models based on each of the M echo parameter vectors and iteratively minimizing a difference between the windowed portion of the ultrasonic signal and a sum of the M parametric echo models.Type: ApplicationFiled: July 17, 2013Publication date: July 24, 2014Inventors: Henri-Pierre Valero, Adam Pedrycz, Takeo Fujihara
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Publication number: 20120324993Abstract: Methods and related systems are described relating to a sealed acoustic transducer assembly for use in a wellbore is provided. A tool body is deployed in the wellbore, having a groove and a sealed acoustic transducer assembly removeably mounted therein. The transducer assembly includes an acoustic transducer element, and an elongated fluid filled sealed container housing the transducer element. The container includes flexible portions along the length of the container which allows for volume changes when exposed to changes in external pressure and/or temperature. Acoustic measurements downhole are made using the transducer element.Type: ApplicationFiled: August 30, 2012Publication date: December 27, 2012Inventors: Hiroshi Nakajima, Toshihiro Kinoshita, Takeo Fujihara, Yasuo Kanaya
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Patent number: 8286475Abstract: Methods and related systems are described relating to a sealed acoustic transducer assembly for use in a wellbore is provided. One or more acoustic transducer elements, which can be receivers or transmitters, are housed in an elongated fluid filled sealed container. The sealed container is adapted to be removeably mounted to a portion of a drill collar. The container, which for example can be made of thin corrugated metal or rubber, includes flexible portions along the length of the container which allows for volume changes when exposed to changes in external pressure and/or temperature.Type: GrantFiled: June 30, 2009Date of Patent: October 16, 2012Assignee: Schlumberger Technology CorporationInventors: Hiroshi Nakajima, Toshihiro Kinoshita, Takeo Fujihara, Yasuo Kanaya
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Publication number: 20100000311Abstract: Methods and related systems are described relating to a sealed acoustic transducer assembly for use in a wellbore is provided. One or more acoustic transducer elements, which can be receivers or transmitters, are housed in an elongated fluid filled sealed container. The sealed container is adapted to be removeably mounted to a portion of a drill collar. The container, which for example can be made of thin corrugated metal or rubber, includes flexible portions along the length of the container which allows for volume changes when exposed to changes in external pressure and/or temperature.Type: ApplicationFiled: June 30, 2009Publication date: January 7, 2010Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: HIROSHI NAKAJIMA, TOSHIHIRO KINOSHITA, TAKEO FUJIHARA, YASUO KANAYA
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Patent number: 4795082Abstract: A container with a sealable band characterized by a container in which the upper and bottom surfaces are of a polyhedral form and a pair of corresponding sides on the upper and bottom surfaces respectively are not parallel with each other; and a sealable band comprising an upper surface portion in which opposite sides form each edge portion, two lateral side portions which are integrally provided extending with the same inclination from each corresponding edge portion of the upper surface portion, and a bottom surface portion extending between the two lateral sides in which the opposite sides form each edge portion.Type: GrantFiled: September 8, 1986Date of Patent: January 3, 1989Assignee: House Food Industrial Company LimitedInventors: Takeo Fujihara, Akira Yamatani, Masanori Yamamoto, Takako Kubo
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Patent number: 4705209Abstract: An erectable container formed by folding a single base board, in which a bottom surface is made in a polygonal form having more than six sides of an even number, first and second side plates are alternately integrally provided extending from each side of the bottom surface provided with a concave fold line, a lid plate is integrally provided at the edge of the first side plate, a tab is integrally provided at the edge of the second side plate, the second side plate being provided with two first convex fold lines extending till upper ends from each vertex at the lower end thereof and the tab being provided with two second convex fold lines extending till upper ends from each end of the first convex fold lines and approaching toward each other with an inclination greater than that of the first convex fold lines, and the boundary line between the second side plate and the tab is made a concave fold at the portion between each end of the first convex fold.Type: GrantFiled: September 8, 1986Date of Patent: November 10, 1987Assignee: House Food Industrial Company LimitedInventors: Takeo Fujihara, Akira Yamatani, Masanori Yamamoto, Yuji Kunimoto