Apparatus and methods for estimating loads and movements of...

E - Fixed Constructions – 21 – B

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E21B 47/06 (2006.01) E21B 47/09 (2006.01) G01L 1/12 (2006.01) G01L 3/10 (2006.01)

Patent

CA 2661911

This disclosure, in one aspect, provides an apparatus for use in a wellbore that includes a member having an encoded magnetic field and a sensor proximate the encoded magnetic field that measures a change in the magnetic field due to a change in the load on the member. In another aspect, a method for measuring loads on a downhole tool is provided that comprises inducing an encoded magnetic field along a section of a member of the tool and detecting a change in the magnetic field due to a load on the member when the tool is in the wellbore.

L'invention concerne, selon un aspect, un appareil destiné à être utilisé dans un trou de forage, ledit appareil comprenant un élément présentant un champ magnétique codé et un codeur placé à proximité du champ magnétique codé pour en mesurer une variation suite à une variation de la charge s'exerçant sur l'élément. L'invention concerne, selon un autre aspect, un procédé de mesure de charges s'exerçant sur un outil de fond de trou, consistant à induire un champ magnétique codé le long d'une partie d'un élément de l'outil et à détecter une variation du champ magnétique due à une charge s'exerçant sur l'élément lorsque l'outil est placé dans le trou de forage.

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