G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 33/24 (2006.01) G01N 1/28 (2006.01)
Patent
CA 2370630
The invention concerns devices for directing cylindrical cores (1) rotating about an axis of revolution (12) said cores having been sampled from a rocky environment or the like which has been subjected, during its formation, to an earth's magnetic field and which consequently has a remanent magnetisation. The inventive device is essentially characterised in that it comprises a bed (2), a cradle (3) and means for associating the cradle (3) with the bed, means for driving the core (1) in rotation substantially about its axis or revolution (12) relative to the cradle when the latter is located in a first portion (5) of the bed (2) and such that its side wall (9) passes substantially through a measuring point (10), means for measuring the magnetic field prevailing at the measuring point, said measuring means being capable of delivering a measuring signal, and means (11) for processing the measuring signal. The invention is particularly useful for directing cores derived from oilfields.
La présente invention concerne les dispositifs permettant d'orienter des carottes (1) de forme cylindrique de révolution autour d'un axe de révolution (12), ces carottes ayant été prélevées dans un milieu rocheux ou analogue qui a été soumis, lors de sa formation, à un champ magnétique terrestre et qui a de ce fait une aimantation rémanente. Le dispositif selon l'invention se caractérise essentiellement par le fait qu'il comporte un banc (2), un berceau (3), des moyens (4) pour associer le berceau (3) avec le banc, des moyens (7) pour entraîner la carotte (1) en rotation sensiblement autour de son axe de révolution (12) par rapport au berceau lorsque le berceau est situé en une première portion (5) du banc (2) et de façon que sa paroi latérale (9) passe sensiblement par un point de mesure (10), des moyens (8) pour mesurer le champ magnétique régnant au point de mesure, ces moyens de mesure étant aptes à délivre un signal de mesure, et des moyens (11) pour traiter le signal de mesure. Application, notamment, à l'orientation des carottes provenant des champs pétrolifères.
Clerc Gerard
Pozzi Jean-Pierre
Marks & Clerk
Martin Jean-Pierre
LandOfFree
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