Downhole hydraulic pipe cutter

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 43/11 (2006.01)

Patent

CA 2633950

The casing cutter disclosed herein is useful for severing downhole tubulars and. comprises a body, slips, a cutting head, cutting blades, and actuators for operating the cutting head and cutting blades. The casing cutter can be anchored within casing wellbore with the slips to provide anchoring support during the cutting operation. Cutting is accomplished by rotatingly actuating the cutting head with an associated motor, and then radially extending the cutting blades away from the cutting head. The cutting blades are actuated by a hydraulic motor operatively coupled to the cutting blades by a series of gears.

L'invention concerne un coupe-tige qui est utile pour couper des éléments tubulaires de fond de puits et comprend un corps, des coins de retenue, une tête de coupe, des lames de coupe et des actionneurs pour faire marcher la tête de coupe et les lames de coupe. On peut ancrer le coupe-tige à l'intérieur du puits de forage de tubage avec les coins de retenue pour fournir un support d'ancrage pendant l'opération de coupe. On effectue la coupe en faisant tourner la tête de coupe au moyen d'un moteur électrique associé puis en faisant sortir radialement les lames de coupe de la tête de coupe. Les lames de coupe sont actionnées par un moteur hydraulique qui fonctionne en étant accouplé aux lames de coupe par une série d'engrenages.

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