Soluble bridge plug suitable for high-temperature well conditions

Abstract

The invention relates to the technical field of structures of soluble bridge plugs, in particular to a soluble bridge plug suitable for high-temperature well conditions. The soluble bridge plug is used for solving the problem of pressure bearing of soluble bridge plugs under high-temperature conditions and comprises a central tube, wherein a spacer ring is arranged at one end of the central tube, an anti-collision ring is arranged at the other end of the central tube, an upper slip, an upper cone, an upper female expansion ring, an upper male expansion ring, an upper rubber sleeve seat, a rubber sleeve, a lower rubber sleeve seat, a lower male expansion ring, a lower female expansion ring, a lower cone and a lower slip are sequentially arranged on the portion, between the spacer ring and the anti-collision ring, of the central tube in a sleeving manner, the upper slip and the lower slip are both of an integral cylindrical slip structure, stress cracks are machined in the inner surface and the outer surface of the upper slip and the inner surface and the outer surface of the lower slip, slip teeth are arranged on the slips, the central tube, the spacer ring, the anti-collision ring, the upper slip, the upper cone, the upper female expansion ring, the upper male expansion ring, the upper rubber sleeve seat, the lower rubber sleeve seat, the lower male expansion ring, the lower female expansion ring, the lower cone and the lower slip are all made of soluble metal, the rubber sleeve is made of soluble rubber, and the slip teeth are made of ceramic. The bridge plug is suitable for high-temperature environment mining.

Description

technical field [0001] The invention relates to the structural technical field of soluble bridge plugs, which are used to solve the pressure bearing problem of soluble bridge plugs under high temperature conditions, and in particular relate to a soluble bridge plug suitable for high temperature well conditions. Background technique [0002] With the rapid development of society, the demand for energy continues to increase, conventional oil and gas resources are decreasing, and unconventional oil and gas resources will be exploited in large quantities. In addition, currently proven unconventional oil and gas resources are very rich, mainly some tight shale gas , shale oil, and coalbed methane. [0003] However, unconventional oil and gas resources are facing development problems such as low permeability or even ultra-low permeability. How to improve the recovery of low permeability oil and gas reservoirs has gradually become an urgent problem to be solved in the field of oil ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the soluble bridge plugs in the prior art cannot meet the production requirements of high-temperature shale gas wells, this application proposes a soluble bridge plug suitable for high-temperature well conditions. The slips adopt an integral cylindrical structure, which not only makes the slip structure more stable, but also avoids the liquid in the well under high temperature conditions from dissolving and destroying the slips, making it suitable for special conditions such as high-temperature shale gas wells. Mine conditions

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