expansion tube
An expansion tube and expansion cone technology, which is applied in the field of plugging tools, can solve problems such as low strength of the expansion tube, unsmooth running, and failure, so as to reduce the risk of running into obstruction, reduce production costs, and improve operating efficiency Effect
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[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0042] Such as figure 1 As shown, the present invention provides an expansion tube, which includes a pressing column 1 , an expansion tube body 2 , a combined variable diameter expansion cone 3 , a hydraulic cylinder 4 and a bottom plug 5 . Wherein: the pressing string 1 has an oil pipe 11, a connecting pipe 12 and a central pipe 13 connected in sequence; the expansion pipe body 2 is sleeved outside the oil pipe 11; the combined reducing cone 3 is located at the lo...
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