Rubber cartridges, packers and bridge plugs with annular packings in the inner core

Abstract

The invention relates to the technical field of sealing of a petroleum exploitation industry and particularly relates to a rubber barrel with annular packing in inner cores, which can bear high temperature and high pressure, and a packer and a bridge plug which are provided with the rubber barrel. A sealing body of the rubber barrel comprises the plurality of inner cores, wherein each inner core is provided with a rubber body and an annular base body; the whole bodies of the plurality of inner cores are arrayed along the axial direction of the rubber barrel; each base body is composed of a plurality of high-temperature-resisting and high-pressure-resisting fiber yarns which are mutually crossed; and the rubber bodies are stuck with the fiber yarns and the rubber bodies are distributed on the surfaces of the base bodies so that inner surfaces and outer surfaces are formed on the inner parts and the outer parts of the plurality of inner cores which are arrayed along the axial direction respectively. The base bodies have the fiber yarns which are mutually crossed, and the rubber bodies are distributed on the surfaces and the inner parts of the base bodies and are used for sticking all the fiber yarns. When the rubber barrel is subjected to axial pressure and is expanded, the fiber yarns limit the expansion, so that the structure rigidity of the rubber barrel is wholly increased and the compressive strength of the rubber barrel is improved.

Description

technical field [0001] The invention relates to the technical field of sealing in the petroleum exploitation industry, in particular to a rubber cartridge with an annular 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 perm...

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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