Decentralized well logging apparatus for measuring the diameters

Details Decentralized well logging apparatus for measuring the diameters Decentralized well logging apparatus for measuring the diameters

1989-05-19

1990-04-10

Haroian, Harry N.

Geometrical instruments

Gauge

Internal

335443, G01B 300

Patent

active

049148265

ABSTRACT:
In the preferred embodiment of the well tool disclosed herein, a main body adapted to be suspended in a borehole includes a pivoted tool-decentralizing arm which is movable between a retracted position along the rear of the body and an extended position where the free end of the arm is biased into sliding engagement with a wall of a borehole for urging the forward face of the body into sliding engagement with the opposite borehole wall. A second body is pivotally coupled on the mid-point of the decentralizing arm for maintaining the second body in alignment with the longitudinal axis of the borehole as the free end of the decentralizing arm moves along the borehole wall. Caliper arms are pivotally mounted on each side of the second body for moving in unison between retracted positions and extended positions where the outward ends of the caliper arms are respectively engaged on opposite sides of the borehole. Measuring devices are operatively coupled to the decentralizing arm and the caliper arms for measuring the diameters of the borehole along the respective movement planes of the arms.

REFERENCES:
patent: 2267110 (1941-12-01), Kinley et al.
patent: 3333466 (1967-08-01), Oliver
patent: 3448373 (1969-06-01), Hahn
patent: 4432143 (1984-02-01), Moriarty et al.

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