Apparatus for gripping a down hole tubular

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 19/06 (2006.01) E21B 19/07 (2006.01) E21B 19/10 (2006.01) E21B 19/16 (2006.01)

Patent

CA 2148346

An apparatus for gripping a down hole tubular for support and rotation, or a string of such tubulars, includes a body element (10) adapted to be rotated at high torques either by a top head drive or a rotary table of an earthdrilling machine. Gripping elements (28) are mounted in a central cavity of the body element (10), and each gripping element (28) includes a lower gripping portion (30) shaped to engage a tapered shoulder of a length of drill pipe to support the drill pipe and an upper gripping portion (50) shaped to engage the tool joint of the drill pipe to rotate the drill pipe.

Appareil pour la préhension d'un tube ou d'un train de tubes, en fond de trou, aux fins de support et de rotation, comprenant un corps (10) adapté pour la transmission d'un mouvement rotatif à couple élevé, soit par un entraînement par le haut, soit par la table de rotation d'une machine de forage. Les éléments de préhension (28) sont montés dans un logement central du corps (10) et chaque élément de préhension (28) comprend une partie préhensile inférieure (30 ) dont la forme permet une prise sur un épaulement effilé de la longueur d'une tige de forage, pour supporter la tige de forage, et une partie de préhension supérieure (50) pour assurer la prise du joint de tiges et faire tourner le train de tiges.

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