Flow meter

G - Physics – 01 – F

Patent

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Details

G01F 1/00 (2006.01) E21B 33/124 (2006.01) E21B 47/00 (2006.01) G01V 9/02 (2006.01)

Patent

CA 2662108

A flow meter to be used in a hole (1) drilled in the bedrock for measuring stream flows in bedrock fractures (2) which are transversal to the hole. The flow meter comprises an elongated body (3) having a cross section which is substantially smaller than the diameter of the hole; separating members (4) placed at a distance from each other in the longitudinal direction of the body for separating the examined section from the other parts of the hole in a substantially pressure-tight manner; dividing members (5) for dividing the examined section into two sectors in the longitudinal direction of the hole; and a flow channel (6) extending through the body and equipped with a flow sensor for measuring the direction and rate of the flow between the sectors. In accordance with the invention, the dividing members (5) are formed of thin and elastic sealing strips (7), which have been fixed to the body and, being substantially perpendicular to the surface of the body, arranged to surround and delimit the sectors.

L'invention concerne un débitmètre à utiliser dans un forage (1) dans la roche afin de mesurer les flux dans des fractures rocheuses (2) transversales au forage. Ce débitmètre comprend un corps allongé (3) possédant une section transversale sensiblement plus petite que le diamètre du forage, des éléments de séparation (4) placés à distance l'un de l'autre dans le sens longitudinal du corps destinés à séparer la partie examinée des autres parties du forage d'une manière sensiblement étanche, des éléments de division (5) destinés à diviser la partie examinée en deux secteurs dans le sens longitudinal du forage et un canal d'écoulement (6) s'étendant à travers le corps et équipé d'un capteur de débit destiné à mesurer le sens et la vitesse du débit entre les secteurs. Selon cette invention, les éléments de division (5) sont formés de bandes d'étanchéités minces et élastiques (7), qui ont été fixées au corps et qui sont sensiblement perpendiculaires à la surface de ce corps, agencées de façon à entourer et délimiter les secteurs.

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