A power tong

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 19/16 (2006.01)

Patent

CA 2545872

A power tong for use during installation and dismantling of pipes when drilling in the ground, such as is known from e.g. petroleum production, comprising a drive ring (30) and at least one clamping device (40), where the clamping device (40) is arranged to grip a pipe string (20), the power tong (2) being equipped with a driving mechanism (32, 34) for rotation of the clamping device (40) about the longitudinal axis of the pipe string (20), and where the clamping device (40) communicates with a fluid supply via a swivel ring (60) that encircles the drive ring (30).

L'invention porte sur une clé de vissage automatique destinée à être utilisée pour l'installation et le démontage de conduites lors du forage du sol, notamment dans le cadre de la production pétrolière. Cette clé de vissage automatique comprend une bague d'entraînement (30) et au moins un dispositif de serrage (40) agencé de façon à saisir un train de tiges (20) et est pourvue d'un mécanisme d'entraînement (32, 34) pour entraîner en rotation le dispositif de serrage (40) autour de l'axe longitudinal du train de tiges (20), ce dispositif de serrage (40) communiquant avec une alimentation fluidique via une bague rotative (60) qui entoure la bague d'entraînement (30).

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