Method and apparatus for rescaling measurements while drilling in different environments
First Claim
1. A method of using a survey system comprising at least one gyroscopic sensor, the method comprising:
- operating the survey system to provide information from a gyroscopic sensor regarding the orientation of a first portion of a wellbore relative to the Earth at a first resolution level while the gyroscopic sensor is within the first portion at a first distance relative to the Earth'"'"'s surface;
operating the survey system to provide information from the gyroscopic sensor regarding the orientation of a second portion of the wellbore relative to the Earth at a second resolution level while the gyroscopic sensor is within the second portion at a second distance relative to the Earth'"'"'s surface, the second distance larger than the first distance, the second resolution level higher than the first resolution level; and
switching between the first resolution level and the second resolution level in response to a signal from the gyroscopic sensor.
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Abstract
A method of using a survey system comprising at least one sensor. The method comprises operating the survey system to provide information regarding the orientation of the sensor relative to the Earth at a first resolution level while the sensor is a first distance relative to the Earth'"'"'s surface and operating the survey system to provide information regarding the orientation of the sensor relative to the Earth at a second resolution level while the sensor is a second distance relative to the Earth'"'"'s surface. The second distance is larger than the first distance. The second resolution level is higher than the first resolution level.
76 Citations
16 Claims
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1. A method of using a survey system comprising at least one gyroscopic sensor, the method comprising:
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operating the survey system to provide information from a gyroscopic sensor regarding the orientation of a first portion of a wellbore relative to the Earth at a first resolution level while the gyroscopic sensor is within the first portion at a first distance relative to the Earth'"'"'s surface; operating the survey system to provide information from the gyroscopic sensor regarding the orientation of a second portion of the wellbore relative to the Earth at a second resolution level while the gyroscopic sensor is within the second portion at a second distance relative to the Earth'"'"'s surface, the second distance larger than the first distance, the second resolution level higher than the first resolution level; and switching between the first resolution level and the second resolution level in response to a signal from the gyroscopic sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A drilling system comprising:
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a drilling tool; and a survey system configured to be operable to provide information regarding the orientation of the drilling tool relative to the Earth at a plurality of resolution levels, the survey system comprising; at least one gyroscopic sensor within the drilling system, the gyroscopic sensor configured to provide information regarding the orientation of the drilling tool relative to the Earth; and a controller coupled to the gyroscopic sensor and adapted to receive a signal from the gyroscopic sensor, the controller configured to operate to provide information from the gyroscopic sensor regarding the orientation of the drilling tool relative to the Earth at a first resolution level when the drilling tool is in a first position or orientation relative to the Earth and to operate to provide information from the gyroscopic sensor regarding the orientation of the drilling tool relative to the Earth at a second resolution level when the drilling tool is in a second position or orientation relative to the Earth, the second resolution level greater than the first resolution level, the controller configured to switch between the first resolution level and the second resolution level in response to the signal from the gyroscopic sensor. - View Dependent Claims (12, 13, 14, 15)
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16. A survey system, configured to be operable to provide information regarding the orientation of portions of a wellbore relative to the Earth at a plurality of resolution levels, the survey system comprising:
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at least one gyroscopic sensor movable within the wellbore, the gyroscopic sensor configured to provide information regarding the orientation of portions of the wellbore relative to the Earth; and a controller coupled to the gyroscopic sensor and adapted to receive a signal from the gyroscopic sensor, the controller configured to operate to provide information from the gyroscopic sensor regarding the orientation of a first portion of the wellbore relative to the Earth at a first resolution level when the gyroscopic sensor is within the first portion at a first distance relative to the Earth'"'"'s surface and to operate to provide information from the gyroscopic sensor regarding the orientation of a second portion of the wellbore relative to the Earth at a second resolution level when the sensor is within the second portion at a second distance relative to the relative to the Earth'"'"'s surface, the second distance larger than the first distance, the second resolution level greater than the first resolution level, the controller configured to switch between the first resolution level and the second resolution level in response to the signal from the gyroscopic sensor.
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Specification