Wall contact caliper instruments for use in a drill string

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United States of America Patent

PATENT NO 8484858
APP PUB NO 20120055711A1
SERIAL NO

13041912

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Abstract

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A drill string caliper includes a mandrel configured to be coupled within a drill string. At least one laterally extensible arm is coupled to an exterior of the mandrel. A biasing device is configured to urge the at least one arm into contact with a wall of a wellbore. A sensor is configured to generate an output signal corresponding to a lateral extent of the at least one arm.

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Patent Owner(s)

  • SCHLUMBERGER TECHNOLOGY CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brannigan, James C Cypress, US 6 118
Garcia-Osuna, Fernando Sugar Land, US 24 507
Nold,, III Raymond V Beasley, US 11 205
Rasmus, John C Richmond, US 16 388
Zazovsky, Alexander Houston, US 22 343

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