Self-adaptive high-performance bridge plug

Abstract

The invention belongs to the field of oil production tools, and particularly relates to a self-adaptive high-performance bridge plug. According to the specific technical scheme, the self-adaptive bridge plug includes central pipes, a rubber cylinder assembly sleeves the central pipes, the rubber cylinder assembly includes two compressed rubber cylinders arranged in surrounded modes, cross sectionsof the compressed rubber cylinders are inverted trapezoids with small inside and large outside, wedge-shaped extrusion parts with the shapes matched with those of the compressed rubber cylinders arearranged above and below the compressed rubber cylinders, self-expanding rubber cylinders are arranged in the middles of the compressed rubber cylinders around the central pipes, the outer surfaces ofthe compressed rubber cylinders are flush with the outer surfaces the first self-expanding rubber cylinders, the first self-expanding rubber cylinders are internally provided with first liquid storage boxes capable of being broken under the extrusion action of the first self-expanding rubber cylinders, and the first liquid storage boxes are filled with liquid capable of expanding the first self-expanding rubber cylinders. According to the self-adaptive high-performance bridge plug, the provided bridge plug has high adaptive capacity to a well wall, can be subjected to automatic remedy and secondary set in case of failure of set, can further unsealed easily in case of unsealing, and the bridge plug and a unsealing barrel can both be recycled and reused.

Description

technical field [0001] The invention belongs to the field of oil production tools, and in particular relates to an adaptive high-performance bridge plug. Background technique [0002] Bridge plug is a common downhole tool in oilfield production, which can realize short-term, long-term or permanent plugging of specific downhole formations. The existing bridge plug generally relies on ordinary compressed rubber during the sealing process. This type of compressed rubber has a small pressure bearing capacity, and its expansion and adaptability to special-shaped well walls are not ideal. When subjected to excessive pressure, it is easy to The seat seal fails, and there is no remedy after failure. In addition, when the existing bridge plug needs to be unsealed after the plugging is completed, it is often necessary to use methods such as drilling and dissolving to destroy the internal structure of the bridge plug, resulting in the bridge plug becoming a consumable, high applicatio...

AI Technical Summary

Problems solved by technology

The existing bridge plug generally relies on ordinary compressed rubber during the sealing process. This type of compressed rubber has a small pressure bearing capacity, and its expansion and adaptability to special-shaped well walls are not ideal. When subjected to excessive pressure, it is easy to The seat seal fails, and there is no remedy after failure

In addition, when the existing bridge plug needs to be unsealed after the plugging is completed, it is often necessary to use methods such as drilling and dissolving to destroy the internal structure of the bridge plug, resulting in the bridge plug becoming a consumable, high application cost, and high requirements for manual operation

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