A self-expanding high-efficiency sealing packer

Abstract

The invention belongs to the field of oil exploration tools, and particularly relates to a self-expansion efficient seal packer. The self-expansion efficient seal packer comprises a base pipe, the base pipe is sleeved with a rubber cylinder capable of self expanding in water and oil environments, the positions, on the base, of the two ends of the rubber cylinder are each fixedly connected with a limiting device, and the limiting devices are separated from the rubber cylinder. Liquid capable of expanding the rubber cylinder is arranged in the limiting devices, the end, facing the limiting devices, of the rubber cylinder is provided with a liquid communication part, the liquid communication part can be automatically started when the rubber cylinder expands to make contact with the limiting devices, and liquid in the limiting devices is guided to the rubber cylinders. According to the packer, the rubber cylinder expansion efficiency is high, expansion is uniform, seal performance is excellent, and liquid seepage is not prone to happening.

Description

technical field [0001] The invention belongs to the field of petroleum exploration tools, and in particular relates to a self-expanding high-efficiency sealing packer. Background technique [0002] At present, with the continuous development of oil and gas exploration, conventional packers can no longer meet the development needs of complex wells. The self-expanding packer in contact with water and oil came into being. The surface of this kind of packer is sleeved with materials such as rubber that can expand spontaneously when it meets water and oil, and can adapt to various irregular wellbores. [0003] Existing self-expanding packers are mainly composed of a self-expanding rubber sleeve and a base pipe. When the rubber sleeve and the base pipe are heated, not only the rubber sleeve will expand, but also the base pipe will be deformed to a certain extent. The rate is not the same, resulting in a certain gap between the base pipe and the rubber tube, which affects the sea...

AI Technical Summary

Problems solved by technology

[0003] Existing self-expanding packers are mainly composed of a self-expanding rubber sleeve and a base pipe. When the rubber sleeve and the base pipe are heated, not only the rubber sleeve will expand, but also the base pipe will be deformed to a certain extent. The ratios are not the same, resulting in a certain gap between the base pipe and the rubber tube, which affects the sealing effect of the packer

In addition, when the rubber tube is in operation, the water and oil encountered in each circumferential direction are inconsistent, resulting in inconsistent shrinkage of the rubber tube

This will not only cause the expansion efficiency of the cartridge, but also cause some distortion of the cartridge, further increasing the possibility of a gap between the base tube and the cartridge

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