Schlumberger Technology Corporation

Christine Aussibal

Frederique Kalb

Pierre Mouget

Laurent P Prouvost

Carolina Dautriche

A magneto-optic sensor for oilfield application, the sensor () receives an incident beam IB, IB, IB, IB, IBand comprises a polarizing element () for providing a determined state of polarization beam and a Faraday rotator () for providing a response beam having a modified state of polarization. The sensor provides a response beam (RB, RB, RB, RB, RBhaving an intensity dependent on an external magnetic field representative of a particular characteristic of a well-bore casing CC, CR applied on the Faraday rotator ().

Magneto-optical sensor

An apparatus for measuring an internal dimension of a well-bore comprising a tool adapted to be positioned inside the well bore. The tool comprises an optical caliper comprising an optical sensor providing a response correlated to the internal dimension of the well bore, the optical sensor being coupled to an optical fiber.

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Villebon sur Yvette, France

Christine Aussibal