Multi-gimbaled borehole navigation system

Details Multi-gimbaled borehole navigation system Multi-gimbaled borehole navigation system

2006-08-22

2006-08-22

Fulton, Christopher W. (Department: 2859)

Geometrical instruments

Indicator of direction of force traversing natural media

Borehole direction or inclination

C033S321000, C033S366130

Reexamination Certificate

active

07093370

ABSTRACT:
An omnidirectional borehole navigation system is provided that includes a housing that can be placed within the smaller diameter drill pipes used towards the bottom of a borehole, an outer gimbal connected to the housing, and at least two or more stacked inner gimbals that are nested in and connected to the outer gimbal, the inner gimbals each having an axis parallel to one another and perpendicular to the outer gimbal. The inner gimbals contain electronic circuits, gyros whose input axes span three dimensional space, and accelerometers whose input axes span three dimensional space. There are an outer gimbal drive system, an inner gimbal drive system for maintaining the gyro input axes and the accelerometer input axes as substantially orthogonal triads, and a processor responsive to the gyro circuits and the accelerometer circuits to determine the attitude and the position of the housing in the borehole.

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