Tubing expansion tool
a technology of expansion tool and expansion tube, which is applied in the direction of drilling rods, drilling pipes, drilling holes/well accessories, etc., can solve the problems of inability to determine the appropriate diameter of the expansion tube, the internal diameter of the expanded tubing is irregular, and the liner cannot be expanded to the appropriate diameter, so as to improve the flexibility of the activation method and the effect of easy recovery
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[0072]Turning firstly to FIG. 1, there is shown a longitudinal sectional view of a tubing expansion tool in accordance with an embodiment of the present invention, indicated generally by reference numeral 10. The tool 10 is shown located in liner 12 which is to be diametrically expanded. The expansion tool 10 is shown in FIG. 1 in a de-activated configuration which allows the tool to be run through the unexpanded liner 12 to the desired location.
[0073]The expansion tool 10 comprises a hollow body 14 and four expansion members 16, each radially moveably mounted on the body 14, for movement towards an extended configuration describing an expansion diameter, as shown in FIG. 2. Each expansion member 16 includes an oval section expansion roller 18 mounted on a piston 20, which is radially moveable in slots 22 in a tapered lower end 24 of the body 14. Alternatively, the roller 18 is mounted in a body or housing pivotably mounted to the tool body 14, for example, by a pivot such as the pi...
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