Method and apparatus for enhancing production from a...

E - Fixed Constructions – 21 – B

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Details

E21B 10/32 (2006.01) A61B 17/16 (2006.01) E21B 10/60 (2006.01) E21B 43/25 (2006.01) E21B 47/09 (2006.01)

Patent

CA 2278792

An apparatus for enhancing production from a wellbore hole may include a body member (12) having at least one cutting assembly (30). Each cutting assembly (30) may have an upper (32), middle (38), and lower cutting arm (44). The cutting arms are hingedly connected to one another. An upper end of each upper cutting arm is hingedly connected to the body member. A lower end of each lower cutting arm is hingedly connected to a corresponding beveled attachment (50) that is slidably received within a corresponding beveled groove in the body member. The body member (12) includes an interior longitudinal bore (29) in fluid communication with a jet nozzle (59) that is located beneath each cutting assembly. The apparatus is connected to a drill string. As the drill string is rotated, each cutting assembly (30) is moved to a fully-deployed position under centrifugal force, thereby enlarging the wellbore hole. Drilling fluid may be pumped into the apparatus to generate hydraulic power to carry loose cuttings to the surface.

L'invention concerne un appareil permettant d'augmenter la production dans un puits de forage. Cet appareil peut comporter un élément corps (12) pourvu d'au moins un ensemble de coupe (30). Chaque ensemble de coupe (30) peut comporter un bras de coupe supérieur (32), central (38) et inférieur (44). Ces bras de coupe sont reliés de manière articulée les uns aux autres. Une extrémité supérieure de chaque bras de coupe supérieur est reliée de manière articulée à l'élément corps. Une extrémité inférieure de chaque bras de coupe inférieur est reliée de manière articulée à une attache (50) biseautée correspondante, logée coulissante dans une cannelure biseautée correspondante dans l'élément corps. L'élément corps (12) comporte un alésage longitudinal intérieur (29) en communication fluidique avec une tuyère (59) située au-dessous de chaque ensemble de coupe. L'appareil est relié à une garniture de forage. A mesure que l'on fait tourner la garniture de forage, chaque ensemble de coupe (30) est déplacé sous l'effet de la force centrifuge dans une positon entièrement déployée, élargissant ainsi le puits de forage. Le fluide de forage peut être pompé dans l'appareil afin de générer une force hydraulique permettant de transporter à la surface des déblais de forage.

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