Schlumberger Technology Corporation

Christian Wilkinson

Indranil Roy

Stephane Hiron

Embodiments may take the form of a tool string sub. The tool string sub may include a longitudinally extending tubular housing having an outside surface and an inside surface. A stepped circumferential portion of the inside surface of the housing bisects the interior surface of the housing. A degradation part is connected adjacent to the stepped portion of the housing and is supported by the housing and at least one moveable support part protruding inward and beyond the inner surface of the housing. The support part has a first position where the degradation part is at first stress and a second position where the degradation part is at a second stress greater than the first stress. At least one end of the tool string sub is adapted to connect with a tool string.

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Houston, TX, United States of America

Christian Wilkinson