G - Physics – 08 – C
Patent
G - Physics
08
C
340/135.3, 340/1
G08C 21/00 (2006.01) E21B 47/09 (2006.01)
Patent
CA 1163693
Abstract of the Disclosure The apparatus disclosed includes a body member lowered within drill pipes and having an upper part and a lower part arranged for limited movements with respect to each other. Each part of the body member is anchored inside the drill pipes and the movements between said parts are detected when stresses are applied to the drill pipes from the surface. A first radial-coil trans- former has a primary winding integral with a part of the body member and a secondary winding integral with the other part to detect the angular movements. A second axial-coil transformer has a primary winding integral with a part of the body member and a secondary winding integral with the other part to detect the longitudinal movements. The signals delivered by the transformers are linear functions of the respective movements.
375531
Schlumberger Canada Limited
Smart & Biggar
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