Method and apparatus for measuring tilt and relative bearing

Details Method and apparatus for measuring tilt and relative bearing Method and apparatus for measuring tilt and relative bearing

1981-04-06

1983-05-31

Little, Willis

Geometrical instruments

Indicator of direction of force traversing natural media

Borehole direction or inclination

33301, 33313, 33395, E21B 4722

Patent

active

043854494

ABSTRACT:
An improved inclinometer and method for simultaneously measuring tilt and relative bearing in remote hostile environments such as oil and gas wells involving a pair of pendulum masses attached to perpendicularly intersecting shafts and individually capable of creating rotational motion through angles characteristic of tilt and relative bearing wherein, by use of a differential gearing system, the rotational motion induced by tilt and rotational motion induced by relative bearing are summed as a single rotational motion parallel to the axis of rotation of the relative bearing induced rotation and collinear to the well bore such that potentiometers responsive to relative bearing and the sum of tilt and relative bearing generate electrical signals that can both be transmitted to the surface without the use of troublesome slipring electrical contacts or the like. In this manner the reliability and durability of instrument is improved.

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patent: 3938255 (1976-02-01), Lichte, Jr.
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patent: 3984918 (1976-10-01), Chaney
patent: 4040189 (1977-08-01), La Coste
patent: 4216590 (1980-08-01), Kelly

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