Rubber cylinder with lower sealing ring coated with upper and lower copper skins, packer and bridge plug

Abstract

The invention relates to the field of sealing, in particular to a rubber cylinder with a lower sealing ring coated with upper and lower copper skins, a packer and a bridge plug at high temperature and high pressure in petroleum production industry. A first copper skin is coated at the exterior of the lower sealing ring of the rubber cylinder, and consists of an upper copper skin and a lower copper skin; the upper copper skin is coated on the upper surface, outside surface and inside surface of the lower sealing ring; the lower copper skin is coated on the lower surface, inside surface and outside surface of the lower sealing ring; the upper copper skin and the lower copper skin are overlapped on the inside surface and outside surface of the lower sealing ring. The rubber cylinder has the advantage that the lower sealing ring is coated by the first copper skin, so that the degrading function of high-temperature and high-pressure steam small molecules on the rubber cylinder is reduced or prevented, and the sealing validity of the rubber cylinder is improved.

Description

technical field [0001] The present application relates to the field of sealing, in particular to a rubber cylinder, a packer and a bridge plug in which the lower end sealing ring can withstand high temperature and high pressure and is covered with upper and lower layers of copper skins used in the oil exploitation industry. 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, and the core component to achieve annular isolation is the rubber cartridge. 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, ...

AI Technical Summary

Problems solved by technology

According to the inventor's test, when the first axial pressure is 30MPa, the inventor finds that almost all of the rubber cartridges will have a shoulder, and when the second axial pressure (such as 15Ma) is further applied, all the rubber cartridges will be at the same time. Cleave at the shoulder leading to seal failure

[0008]Furthermore, the inventor also found that even if the rubber cartridge can be sealed, when bottomhole gas and other substances impact the rubber cartridge, the high-temperature and high-pressure steam contained therein will be less Molecules will degrade the rubber cartridge of polymer materials, causing the rubber cartridge to lose its elasticity at the lower end first and unable to play a sealing role, affecting the long-term sealing of the rubber cartridge

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