Thrust enhancement device for coiled tubing injectors

Details Thrust enhancement device for coiled tubing injectors Thrust enhancement device for coiled tubing injectors

E - Fixed Constructions

21

B

E21B 19/22 (2006.01)

Patent

CA 2375732

A means and method for improving the injection of coiled tubing into and from a well by providing a secondary injection device for supplementing the thrust forces of the primary injector means. Use of the secondary injection device coacting in tandem with the coiled tubing injector permits developing significantly higher axial forces in the tubing than can be provided by the primary injector alone. The selectably operable thrust enhancement device of this invention provides a short, repeatable stroke in either direction. The thrust enhancement device operates by selectably gripping the tubing with a reciprocably moveable means in a first position, shifting the moveable means to a second position thereby moving the tubing, gripping the tubing with a static means at its new position, releasing the tubing from the moveable means, and returning the moveable means to its first position. When the thrust enhancement device is not needed for the injection operation, its gripping means are disengaged from the tubing.

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