All angle borehole tool

Details All angle borehole tool All angle borehole tool

1976-09-24

1978-04-11

Stephan, Steven L.

Geometrical instruments

Indicator of direction of force traversing natural media

Borehole direction or inclination

G01C 902

Patent

active

040831175

ABSTRACT:
Inclination and high side angle of a borehole is measured by a tool that may be positioned inside a drill string and lowered into the borehole. The tool includes three gravity transducers positioned in a novel array. The transducers are positioned in a case whose axis coincides with that of the borehole and are arranged with their axes angularly displaced from each other around the case axis by approximately 120 degrees and from the case axis by approximately 45 degrees. An array of fluxgate magnetic transducers may be added to the apparatus to provide combination surveying and steering capability.

REFERENCES:
patent: 3862499 (1975-01-01), Isham et al.
patent: 3913406 (1975-10-01), Johnston

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