Tool for repairing sleeve with expansion pipe
A technology of expanding pipes and repairing casings, which is applied in wellbore/well components, earth-moving drilling and production, etc., can solve the problem of not being able to provide the hydraulic pressure below the downhole expansion head, and achieve the effect of avoiding the increase of expansion force.
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[0007] For the structure of the expansion tube repairing tool, see figure 1 The expansion tube repairing tool includes an expansion tube 6, the two ends of the expansion tube 6 are expanded to form an upper expansion chamber and a lower expansion chamber, the lower end of the expansion tube 6 is connected to the guide head 12 and sealed, and the lower expansion chamber of the expansion tube 6 above the guide head 12 The expansion head 9 is arranged inside, and the seal 10 is used to seal between the expansion head 9 and the lower expansion chamber of the expansion tube 6. The upper end of the expansion head 9 is connected to the tie rod 1 and a seal is formed between the two. The sealing ring 3 is sleeved on the outer circumference of the tie rod 1 and located In the upper expansion cavity of the expansion tube 6, the inner hole of the sealing ring 3 and the tie rod are sealed by the seal 5, and the seal ring 3 and the upper expansion cavity of the expansion tube 6 are sealed b...
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