Rubber cylinder with inner cores provided with spiral packing, packer and bridge plug

Abstract

The invention relates to the technical field of sealing in oil exploitation industry, in particular to a rubber cylinder capable of withstanding high temperature and high pressure and with inner cores provided with spiral packing, and a packer and a bridge plug with the rubber cylinder. The inner cores of the rubber cylinder are provided with colloids and spiral matrices, the plurality of inner cores are arranged entirely along the axial direction of the rubber cylinder, the matrices are formed by a plurality of intercrossing high temperature and high pressure resistant fibers, the colloids are adhered to the fibers, and distributed on the surface of each of the matrices so that the inner sides and the outer sides of the axially arranged inner cores form inside surfaces and outside surfaces. The colloids coat the inner cores, the inner cores are provided with intercrossing fibers, and the colloids are distributed on the surface and the inner side of each of the inner cores and adhered to the fibers. When the rubber cylinder expands under action of axial pressure, the fibers can limit the expansion so that structural hardness of the cylinder rubber is completely increased, and compressive strength of the rubber cylinder is raised.

Description

technical field [0001] The invention relates to the technical field of sealing in the oil exploitation industry, in particular to a rubber cartridge with a spiral packing in the inner core capable of withstanding high temperature and high pressure, and a packer and a bridge plug with the rubber cartridge. Background technique [0002] Packer is a key tool for downhole oil production in oilfields. It is widely used in various operations such as oilfield injection, layered reconstruction, layered oil production, mechanical pipeline water plugging, etc. The packer needs to isolate the annular space to achieve Oil and gas stratification. Bridge plug is also a tool for oil and gas stratification commonly used in oil production. The main difference between the packer and the bridge plug is that the packer is generally temporarily left in the well during the construction of fracturing, acidizing, leak-finding and other measures, while the bridge plug is temporarily or permanently ...

AI Technical Summary

Problems solved by technology

When the rubber tube bears a certain pressure to promote its deformation for sealing, it is necessary to consider the deformation capacity of the rubber tube itself. If the deformation is insufficient, it will not be able to perform the sealing function; if the deformation is too large, it may cause the rubber tube to collapse due to crushing. failure, loss of resilience

The most important thing is that when the rubber cartridge is subjected to high-temperature steam in the downhole, the rubber cartridge is more likely to fail due to the simultaneous action of high temperature and high pressure, resulting in loss of recovery ability

[0004] The inventors have found that due to the difference in the softness and hardness of the colloids that make up the rubber cartridge (the degree of deformation of the colloid under a certain pressure), for example, when a softer colloid is used to make a rubber cartridge, the rubber cartridge will not be able to bear the shaft of the rated size. It is crushed under the pressure, or at this time, the rubber tube is deformed too much under the rated axial pressure and crushed

And when the rubber tube is hard, the rubber tube cannot fully deform under the axial pressure of the rated size, so that the rubber tube cannot play a sealing role

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