Patents by Inventor Gareth P. Lees
Gareth P. Lees 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: 10458224Abstract: Monitoring one or more items of equipment associated with a borehole or other conduit. A sensor system includes a vibration sensor for sensing vibrations at one or more sensor locations associated with one or more items of the equipment and/or the borehole or other conduit. A processing system processes the sensor information to determine a characteristic of the operation of the one or more items of equipment and/or the borehole or other conduit.Type: GrantFiled: February 2, 2015Date of Patent: October 29, 2019Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Paul Frederick Cilgrim Dickenson, Gareth P. Lees, Arthur H. Hartog, Cheng-Gang Xie, Paul Simon Hammond, Ashley Bernard Johnson, Gary Martin Oddie, Andrew William Meredith, Franck Bruno Jean Monmont, Theo Cuny
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Publication number: 20170167245Abstract: Monitoring one or more items of equipment associated with a borehole or other conduit. A sensor system includes a vibration sensor for sensing vibrations at one or more sensor locations associated with one or more items of the equipment and/or the borehole or other conduit. A processing system processes the sensor information to determine a characteristic of the operation of the one or more items of equipment and/or the borehole or other conduit.Type: ApplicationFiled: February 2, 2015Publication date: June 15, 2017Inventors: Paul Frederick Cilgrim Dickenson, Gareth P. Lees, Arthur H. Hartog, Cheng-Gang Xie, Paul Simon Hammond, Ashley Bernard Johnson, Gary Martin Oddie, Andrew William Meredith, Franck Bruno Jean Monmont, Theo Cuny
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Patent number: 9250120Abstract: A cable for monitoring a tubular structure. The cable comprising a fiber optic bundle arranged for simultaneously sensing a plurality of parameters along a length of the tubular structure that the cable is interfaced with.Type: GrantFiled: June 25, 2012Date of Patent: February 2, 2016Assignee: Schlumberger Technology CorporationInventors: Russell James Smith, Andrew Strong, Gareth P Lees
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Publication number: 20140312215Abstract: A cable for monitoring a tubular structure. The cable comprising a fiber optic bundle arranged for simultaneously sensing a plurality of parameters along a length of the tubular structure that the cable is interfaced with.Type: ApplicationFiled: June 25, 2012Publication date: October 23, 2014Inventors: Russell James Smith, Andrew Strong, Gareth P Lees
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Patent number: 8408064Abstract: A distributed acoustic wave detection system and method is provided. The system may include a fiber optic cable deployed in a well and configured to react to pressure changes resulting from a propagating acoustic wave and an optical source configured to launch interrogating pulses into the fiber optic cable. In addition, the system may include a receiver configured to detect coherent Rayleigh noise produced in response to the interrogating pulses. The CRN signal may be use to track the propagation of the acoustic wave in the well.Type: GrantFiled: November 4, 2009Date of Patent: April 2, 2013Assignee: Schlumberger Technology CorporationInventors: Arthur H. Hartog, Douglas Miller, Kamal Kader, Gareth P. Lees, Graeme Hilton, Stephen Mullens
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Patent number: 8077314Abstract: To measure a characteristic of a multimode optical fiber, a light pulse source produces a light pulse for transmission into the multimode optical fiber. A spatial filter passes a portion of Brillouin backscattered light from the multimode optical fiber that is responsive to the light pulse. Optical detection equipment detects the portion of the Brillouin backscattered light passed by the spatial filter.Type: GrantFiled: September 30, 2008Date of Patent: December 13, 2011Assignee: Schlumberger Technology CorporationInventors: Dylan Davies, Arthur H. Hartog, Graeme Hilton, Gareth P. Lees
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Publication number: 20110194107Abstract: A technique facilitates the monitoring of elongate structures. An elongate structure is combined with an optical fiber deployed along the structure. An interrogation system is operatively joined with the optical fiber to input and monitor optical signals to determine any changes in parameters related to the structure.Type: ApplicationFiled: April 18, 2011Publication date: August 11, 2011Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Arthur H. HARTOG, Andrew STRONG, Graeme HILTON, Gareth P. LEES
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Patent number: 7881566Abstract: An improved laser source for use in a distributed temperature sensing (DTS) system (and DTS systems employing the same) includes a laser device and drive circuitry that cooperate to emit an optical pulse train at a characteristic wavelength between 1050 nm and 1090 nm. An optical amplifier, which is operably coupled to the laser device, is adapted to amplify the optical pulse train for output over the optical fiber sensor of the DTS system. In the preferred embodiment, the laser device operates at 1064 nm and outputs the optical pulse train via an optical fiber pigtail that is integral to its housing. The optical power of the optical pulse train generated by the laser source is greater than 100 mW, and preferably greater than 1 W, at a preferred pulse repetition frequency range between 1 and 50 kHz, and at a preferred pulse width range between 2 and 100 ns.Type: GrantFiled: January 10, 2006Date of Patent: February 1, 2011Assignee: Schlumberger Technology CorporationInventors: Gareth P. Lees, Arthur H. Hartog, Peter C. Wait
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Publication number: 20100107754Abstract: A distributed acoustic wave detection system and method is provided. The system may include a fiber optic cable deployed in a well and configured to react to pressure changes resulting from a propagating acoustic wave and an optical source configured to launch interrogating pulses into the fiber optic cable. In addition, the system may include a receiver configured to detect coherent Rayleigh noise produced in response to the interrogating pulses. The CRN signal may be use to track the propagation of the acoustic wave in the well.Type: ApplicationFiled: November 4, 2009Publication date: May 6, 2010Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Arthur H. Hartog, Douglas Miller, Kamal Kader, Gareth P. Lees, Graeme Hilton, Stephen Mullens
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Publication number: 20090132183Abstract: A technique facilitates the monitoring of elongate structures. An elongate structure is combined with an optical fiber deployed along the structure. An interrogation system is operatively joined with the optical fiber to input and monitor optical signals to determine any changes in parameters related to the structure.Type: ApplicationFiled: February 22, 2007Publication date: May 21, 2009Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Arthur H. Hartog, Andrew Strong, Graeme Hilton, Gareth P. Lees
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Publication number: 20090097015Abstract: To measure a characteristic of a multimode optical fiber, a light pulse source produces a light pulse for transmission into the multimode optical fiber. A spatial filter passes a portion of Brillouin backscattered light from the multimode optical fiber that is responsive to the light pulse. Optical detection equipment detects the portion of the Brillouin backscattered light passed by the spatial filter.Type: ApplicationFiled: September 30, 2008Publication date: April 16, 2009Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Dylan Davies, Arthur H. Hartog, Graeme Hilton, Gareth P. Lees
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Patent number: 7504618Abstract: To perform distributed sensing with an optical fiber using Brillouin scattering, a light pulse is transmitted into the optical fiber, where the transmitted light pulse has a first frequency. Backscattered light and optical local oscillator light are combined, where the backscattered light is received from the optical fiber in response to the transmitted light pulse, and where the optical local oscillator light has a second frequency. A frequency offset is caused to be present between the first frequency of the transmitted light pulse and the second frequency of the optical local oscillator light, where the frequency offset is at least 1 GHz less than a Brillouin frequency shift of the backscattered light. Spectra representing Stokes and anti-Stokes components of the backscattered light are acquired, where the Stokes and anti-Stokes components are separated by a frequency span that is based on the frequency offset.Type: GrantFiled: July 3, 2007Date of Patent: March 17, 2009Assignees: Schlumberger Technology Corporation, BP Exploration Operating Company LimitedInventors: Arthur H. Hartog, Gareth P. Lees
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Publication number: 20090008536Abstract: To perform distributed sensing with an optical fiber using Brillouin scattering, a light pulse is transmitted into the optical fiber, where the transmitted light pulse has a first frequency. Backscattered light and optical local oscillator light are combined, where the backscattered light is received from the optical fiber in response to the transmitted light pulse, and where the optical local oscillator light has a second frequency. A frequency offset is caused to be present between the first frequency of the transmitted light pulse and the second frequency of the optical local oscillator light, where the frequency offset is at least 1 GHz less than a Brillouin frequency shift of the backscattered light. Spectra representing Stokes and anti-Stokes components of the backscattered light are acquired, where the Stokes and anti-Stokes components are separated by a frequency span that is based on the frequency offset.Type: ApplicationFiled: July 3, 2007Publication date: January 8, 2009Applicants: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Arthur H. Hartog, Gareth P. Lees
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Publication number: 20080246947Abstract: An improved laser source for use in a distributed temperature sensing (DTS) system (and DTS systems employing the same) includes a laser device and drive circuitry that cooperate to emit an optical pulse train at a characteristic wavelength between 1050 nm and 1090 nm. An optical amplifier, which is operably coupled to the laser device, is adapted to amplify the optical pulse train for output over the optical fiber sensor of the DTS system. In the preferred embodiment, the laser device operates at 1064 nm and outputs the optical pulse train via an optical fiber pigtail that is integral to its housing. The optical power of the optical pulse train generated by the laser source is greater than 100 mW, and preferably greater than 1 W, at a preferred pulse repetition frequency range between 1 and 50 kHz, and at a preferred pulse width range between 2 and 100 ns.Type: ApplicationFiled: January 10, 2006Publication date: October 9, 2008Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Gareth P. Lees, Arthur H. Hartog, Peter C. Wait