A coiled tubing injector (100), rollers (152) on the backside of grippers (106) on a gripper chain (102, 104) pass over at least one shallow groove or depression formed in, or gap between segments of, a planar roller contact surface of a skate (146, 148), thereby momentarily removing or reducing the force being applied by the skate (146, 148) to the grippers (106) as the grippers (106) pass through at least one predetermined location within a gripping zone of the coiled tubing injector (100). The reduction or removal of the force on the grippers (106) allows the grippers (106) to reset their positions on the tubing (109) at one or more predetermined locations in order to accommodate changes in the strain caused by changes in stress as the tubing (109) moves through the injector (100).
Coiled tubing injector with strain relief
Einführungsvorrichtung für gewickelten Rohrstrang mit Spannungsentlastung
Injecteur de tube enroulé avec dispositif de relâchement de contraintes
2015-10-28
Patent
Electronic Resource
English
SAE Technical Papers | 1960
TRANSPORT TRAILER REEL AND INJECTOR SHIFT FOR MAXIMIZING COILED TUBING LOAD DISTRIBUTION
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