1
Roger Ekseth, Gary William Uttecht: System and method for using rotation sensors within a borehole. Gyrodata Incorporated, Knobbe Martens Olson & Bear, April 29, 2008: US07363717 (40 worldwide citation)

A system and method for using a survey tool within a borehole is provided. The survey tool includes a plurality of rotation sensors each having a sensing axis and a direction of least acceleration sensitivity. The sensing axes of the plurality of rotation sensors are generally parallel to one anothe ...


2
Roger Ekseth, Gary William Uttecht: System and method for using microgyros to measure the orientation of a survey tool within a borehole. Gyrodata Incorporated, Knobbe Martens Olson & Bear, October 10, 2006: US07117605 (24 worldwide citation)

A system and method for determining an orientation of the survey tool within a borehole utilizes a survey tool including a plurality of rotation sensors each having a sensing axis and a direction of least acceleration sensitivity. The plurality of rotation sensors are mounted in a housing with their ...


3
Roger Ekseth, Gary William Uttecht: System and method for using microgyros to measure the orientation of a survey tool within a borehole. Gyrodata Incorporated, Knobbe Martens Olson & Bear, June 5, 2007: US07225550 (17 worldwide citation)

A system and method for determining an orientation of the survey tool within a borehole utilizes a survey tool including a plurality of rotation sensors each having a sensing axis and a direction of least acceleration sensitivity. The plurality of rotation sensors are mounted in a housing with their ...


4
Roger Ekseth, John Lionel Weston, Gary William Uttecht: Reducing error contributions to gyroscopic measurements from a wellbore survey system. Gyrodata Incorporated, Knobbe Martens Olson & Bear, February 12, 2013: US08374793 (4 worldwide citation)

A method reduces error contributions to gyroscopic measurements from a first gyroscopic sensor and a second gyroscopic sensor. The method includes receiving a first set of measurement signals and a second set of measurement signals indicative of at least one substantially perpendicular component and ...


5
Roger Ekseth, John Lionel Weston, Gary William Uttecht: Reducing error contributions to gyroscopic measurements from a wellbore survey system. GYRODATA Incorporated, Knobbe Martens Olson & Bear, November 22, 2011: US08065087 (4 worldwide citation)

A method reduces error contributions to gyroscopic measurements from a wellbore survey system having two gyroscopic sensors adapted to generate signals indicative of at least one component of the Earth's rotation substantially perpendicular to the wellbore and indicative of a component of the Earth' ...


6
Roger Ekseth, Gary William Uttecht: System and method for using microgyros to measure the orientation of a survey tool within a borehole. Knobbe Martens Olson & Bear, January 25, 2007: US20070017106-A1

A system and method for determining an orientation of the survey tool within a borehole utilizes a survey tool including a plurality of rotation sensors each having a sensing axis and a direction of least acceleration sensitivity. The plurality of rotation sensors are mounted in a housing with their ...


7
Roger Ekseth, Gary William Uttecht: System and method for using rotation sensors within a borehole. Gyrodata Incorporated, Knobbe Martens Olson & Bear, October 11, 2007: US20070234580-A1

A system and method for using a survey tool within a borehole is provided. The survey tool includes a plurality of rotation sensors each having a sensing axis and a direction of least acceleration sensitivity. The sensing axes of the plurality of rotation sensors are generally parallel to one anothe ...


8
Roger Ekseth, Gary William Uttecht: System and method for using microgyros to measure the orientation of a survey tool within a borehole. Knobbe Martens Olson & Bear, October 13, 2005: US20050224257-A1

A system and method for determining an orientation of the survey tool within a borehole utilizes a survey tool including a plurality of rotation sensors each having a sensing axis and a direction of least acceleration sensitivity. The plurality of rotation sensors are mounted in a housing with their ...


9
Roger Ekseth, John Lionel Weston, Gary William Uttecht: Reducing error contributions to gyroscopic measurements from a wellbore survey system. Knobbe Martens Olson & Bear, August 5, 2010: US20100198518-A1

A method reduces error contributions to gyroscopic measurements from a wellbore survey system having two gyroscopic sensors adapted to generate signals indicative of at least one component of the Earth's rotation substantially perpendicular to the wellbore and indicative of a component of the Earth' ...


10
Roger Ekseth, John Lionel Weston, Gary William Uttecht: Reducing error contributions to gyroscopic measurements from a wellbore survey system. Gyrodata Incorporated, April 19, 2012: US20120095685-A1

A method reduces gravity-dependent error contributions to gyroscopic measurements from a first gyroscopic sensor and a second gyroscopic sensor. The method includes receiving a first set of measurement signals and a second set of measurement signals indicative of at least one substantially perpendic ...