Centralizer-based survey and navigation device and method
First Claim
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1. A metrology device, comprising:
- at least one sensor string segment;
at least three centralizers;
at least one metrology sensor; and
at least one odometry device; and
wherein said metrology sensor is a displacement detector; and
wherein said displacement detector is configured to measure the displacement of a straight beam relative to one of said at least three centralizers; and
wherein said straight beam is fixed to a first centralizer and a third centralizer, where said one of said three centralizers is a second centralizer between said first and second centralizers.
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Abstract
A Centralizer based Survey and Navigation (CSN) device designed to provide borehole or passageway position information. The CSN device can include one or more displacement sensors, centralizers, an odometry sensor, a borehole initialization system, and navigation algorithm implementing processor(s). Also, methods of using the CSN device for in-hole survey and navigation.
87 Citations
6 Claims
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1. A metrology device, comprising:
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at least one sensor string segment; at least three centralizers; at least one metrology sensor; and at least one odometry device; and wherein said metrology sensor is a displacement detector; and wherein said displacement detector is configured to measure the displacement of a straight beam relative to one of said at least three centralizers; and wherein said straight beam is fixed to a first centralizer and a third centralizer, where said one of said three centralizers is a second centralizer between said first and second centralizers. - View Dependent Claims (2, 3)
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4. A metrology sensing device, comprising:
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at least three centralizers; a beam connecting at least two of said at least three centralizers; a metrology sensor associated with said beam, said metrology sensor being located between said centralizers; a housing encasing said beam and said metrology sensor; and fluid within said housing and at least partially supporting said beam. - View Dependent Claims (5, 6)
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Specification