Wide angle inclinometer

Details Wide angle inclinometer Wide angle inclinometer

1979-04-06

1980-08-12

Stephan, Steven L.

Geometrical instruments

Indicator of direction of force traversing natural media

Borehole direction or inclination

33307, E21B 47022, G01C 900

Patent

active

042165903

ABSTRACT:
Improved apparatus for measuring the angular deviation from the vertical of the end of the drill string which includes a housing adapted for insertion in the drill string, a pendulum pivotally mounted in the housing and capable of swinging through large angles, and a substantially perfectly balanced catch link pivoted at the same point as the pendulum and normally coaxially aligned with the end of the drill string. Means are provided for coupling the pendulum and catch link together at a preselected angle and for measuring the deflection of the coupled pendulum and catch link from the axis of the end of the drill string so that the angular deviation from the vertical of the end of the drill string may be determined. Means are provided for signalling the measure of the deflection to the surface.

REFERENCES:
patent: 2329732 (1943-09-01), Varney et al.
patent: 2435934 (1948-02-01), Varney et al.
patent: 2762132 (1956-09-01), Varney
patent: 2824380 (1958-02-01), Nelson
patent: 3176407 (1965-04-01), Alder et al.
patent: 3431654 (1969-03-01), Alder
patent: 3466755 (1969-09-01), Alder
patent: 3555691 (1971-01-01), Jacoby
patent: 3571936 (1971-03-01), Taylor
The Teledrift Inclinometer, Paper Submitted to Society of Petroleum Engineers, Oct. 24, 1963.

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