Improved coiled tubing injector head

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 19/22 (2006.01)

Patent

CA 2606486

An improved coiled tubing injector head, comprising a plurality of powered chain loops (1) , each having one practically straight side adjacent to the other chain loop(s) and biased against a tubing (2) running in-between all the loops so as to grip the tubing and allow its transit into and out of a well. The chain loops are assembled from multifunctional links (23, 24) which both transmit drive and also form carriers for replaceable gripper blocks or are the carriers and gripper blocks combined, without need of a roller link chain or chains in addition to the multifunctional links. Three or more chain loops are provided, and the chain loops are driven by electric motors.

Tête améliorée pour l'injection de tubages roulés, comportant une pluralité de boucles de chaînes motorisées (1), chacune présentant un côté pratiquement droit adjacent aux autres boucles de chaînes et pressé contre un tubage (2) passant entre toutes les boucles de manière à saisir le tubage et à permettre son passage dans et hors d'un puits. Les boucles de chaînes sont assemblées à partir de maillons multifonctions (23, 24) servant à la fois à transmettre le mouvement et à former des supports pour des blocs de préhension remplaçables, ou combinant les supports et les blocs de préhension, sans qu'il y ait nécessité d'une ou plusieurs chaînes à rouleaux en plus des maillons multifonctions. Trois boucles de chaînes ou davantage sont prévues, et les boucles de chaînes sont entraînées par des moteurs électriques.

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