Borehole tool outrigger arm displacement control mechanism

Details Borehole tool outrigger arm displacement control mechanism Borehole tool outrigger arm displacement control mechanism

1982-07-30

1985-03-19

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetic sensor within material

166241, 175325, 250268, 324346, G01N 2772, E21B 1710, G01R 3300

Patent

active

045062196

ABSTRACT:
As the outrigger arms of a borehole logging tool are flexed inwardly and outwardly according to the diameter of the borehole opening through which they pass, the corresponding axial displacements of the ends of the arms are controlled to determine the axial positions of the arms relative to the tool. Specifically, as the arm ends move, they are caused to rotate by a cam mechanism. The stiffness of the arms causes the arm ends to rotate in unison, and the exact positions of the arms on the tool are then controlled by the differential movements of the arm ends in the cams.

REFERENCES:
patent: 2258052 (1941-10-01), Hall
patent: 2688115 (1954-08-01), Hildebrandt
patent: 3267366 (1966-08-01), Bricaud
patent: 3940689 (1976-02-01), Johnson
patent: 3973181 (1976-08-01), Calvert

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