Rubber barrel with inner side of lower seal ring not coated with copper sheet, packer, and bridge plug

Abstract

The application relates to the field of sealing, in particular to a rubber barrel with inner side of a lower seal ring not coated with copper sheet, a packer and a bridge plug, with the rubber barrel capable of bearing high temperature and high pressure in the oil production industry. The outside of the lower seal ring of the rubber barrel is covered with first copper sheet, and the first copper sheet covers the upper surface, lower surface and outer side of the lower seal ring instead of the inner side of the lower seal ring; the thickness of the first copper sheet is configured such that when an upper portion bears first axial pressure, the lower seal ring deforms radially to enable the first copper sheet distributed on the inner side of the lower seal ring to contact a center tube, and the first copper sheet distributed on the outer surface of the lower seal ring to contact a sleeve. The lower seal ring of the application is covered with the first copper sheet, the degrading effect of high-temperature high-pressure steam small molecules on the rubber barrel is decreased or avoided, and long-term sealing effectiveness of the rubber barrel is improved.

Description

technical field [0001] The present application relates to the field of sealing, in particular to a rubber sleeve, a packer and a bridge plug which are used in the oil exploitation industry and can withstand high temperature and high pressure, and the inner surface of the lower sealing ring is not coated with copper skin. 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, aci...

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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