Rubber cylinder coated with upper and lower copper skins on lower end sealing ring as well as packer and bridge plug

Abstract

The invention relates to the field of sealing, in particular to a rubber cylinder coated with upper and lower copper skins on a lower end sealing ring as well as a packer and a bridge plug, which are used in the petroleum production industry. A first copper skin coats the lower end sealing ring of the rubber cylinder; the first copper skin comprises an upper side copper skin and a lower side copper skin; the upper side copper skin coats the upper surface, the external side surface and the internal side surface of the lower end sealing ring; the lower side copper skin coats the lower surface, the internal side surface and the external side surface of the lower end sealing ring; and the upper side copper skin and the lower side copper skin are overlapped on the internal side surface and the external side surface of the lower end sealing ring. According to the invention, as the first copper skin coats the lower end sealing ring, a degradation effect, on the rubber cylinder, of small molecules of high temperature high pressure vapor is lightened or prevented and the long-term effect of the sealing of the rubber cylinder is enhanced.

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

Images