Patents by Inventor Larry Schoonover
Larry Schoonover 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: 9857801Abstract: A method of performing online diagnostics for a valve includes receiving valve information while the valve is in operation. The valve information includes setpoint data and position data associated with the valve. The method further includes processing the setpoint data and the position data at a plurality of time intervals, and detecting an occurrence of a stick-slip based on the processing.Type: GrantFiled: March 31, 2014Date of Patent: January 2, 2018Assignee: General Electric CompanyInventors: Frederick Wilson Wheeler, Robert Claude Prescott, Justin Shriver, Larry Schoonover
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Publication number: 20150277445Abstract: A method of performing online diagnostics for a valve includes receiving valve information while the valve is in operation. The valve information includes setpoint data and position data associated with the valve. The method further includes processing the setpoint data and the position data at a plurality of time intervals, and detecting an occurrence of a stick-slip based on the processing.Type: ApplicationFiled: March 31, 2014Publication date: October 1, 2015Applicant: General Electric CompanyInventors: Frederick Wilson Wheeler, Robert Claude Prescott, Justin Shriver, Larry Schoonover
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Patent number: 7953575Abstract: When an electrical submersible pump motor runs, rotary vibrations occur in the same direction as the rotation of the motor. This vibration can be detected by an XY vibration sensor. Depending on the rotation direction, the vibration along the X-axis will be out of phase +90 degrees or ?90 degrees with the vibration in the Y-axis. To determine the rotation direction, the vibration sensor measures a vibration of an ESP pump in two axes, recording first and second vibration signals. Next, whether the first signal either leads or lags the second signal is determined by, for example, comparing correlations of the first and second signal with the second signal shifted by plus and minus one-fourth of the period of rotation. Then a direction of a rotation of the electrical submersible pump can be determined responsive to the determination of whether the first signal either leads or lags the second signal.Type: GrantFiled: January 27, 2009Date of Patent: May 31, 2011Assignee: Baker Hughes IncorporatedInventor: Larry Schoonover
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Publication number: 20100191484Abstract: When an electrical submersible pump motor runs, rotary vibrations occur in the same direction as the rotation of the motor. This vibration can be detected by an XY vibration sensor. Depending on the rotation direction, the vibration along the X-axis will be out of phase +90 degrees or ?90 degrees with the vibration in the Y-axis. To determine the rotation direction, the vibration sensor measures a vibration of an ESP pump in two axes, recording first and second vibration signals. Next, whether the first signal either leads or lags the second signal is determined by, for example, comparing correlations of the first and second signal with the second signal shifted by plus and minus one-fourth of the period of rotation. Then a direction of a rotation of the electrical submersible pump can be determined responsive to the determination of whether the first signal either leads or lags the second signal.Type: ApplicationFiled: January 27, 2009Publication date: July 29, 2010Applicant: Baker Hughes IncorporatedInventor: Larry Schoonover
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Patent number: 7089086Abstract: Methods and systems for performing online valve diagnostics. Valve characteristics such as step response, friction and spring range are determined while the valve is operating in a process without intervention by a controller deriving the valve diagnostics. Valve information is obtained while the valve operates in response to a control signal controlling a process while the valve operates through a series of gradual movements. Valve characteristics are then determined from the valve information.Type: GrantFiled: February 12, 2004Date of Patent: August 8, 2006Assignee: Dresser, Inc.Inventor: Larry Schoonover
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Publication number: 20040228173Abstract: Methods and systems for performing online valve diagnostics. Valve characteristics such as step response, friction and spring range are determined while the valve is operating in a process without intervention by a controller deriving the valve diagnostics. Valve information is obtained while the valve operates in response to a control signal controlling a process while the valve operates through a series of gradual movements. Valve characteristics are then determined from the valve information.Type: ApplicationFiled: February 12, 2004Publication date: November 18, 2004Inventor: Larry Schoonover
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Patent number: 6745084Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: GrantFiled: April 10, 2001Date of Patent: June 1, 2004Assignee: Dresser, Inc.Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares
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Patent number: 6453261Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: GrantFiled: April 10, 2001Date of Patent: September 17, 2002Assignee: Dresser, Inc.Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares
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Publication number: 20010037670Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: ApplicationFiled: April 10, 2001Publication date: November 8, 2001Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares
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Publication number: 20010037159Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: ApplicationFiled: April 10, 2001Publication date: November 1, 2001Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares
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Publication number: 20010032518Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: ApplicationFiled: April 10, 2001Publication date: October 25, 2001Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares
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Patent number: 6272401Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: GrantFiled: July 17, 1998Date of Patent: August 7, 2001Assignee: Dresser Industries, Inc.Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares