Rubber cartridges, packers and bridge plugs covered with open copper skin on the lower sealing ring

Abstract

The invention relates to the field of sealing, in particular to a rubber sleeve with a lower end seal ring covered with an opened copper sheet, a packer and a bridge plug, wherein the rubber sleeve is used in the oil exploitation industry and can bearing high temperature and high pressure. The lower end seal ring of the rubber sleeve is covered with the first copper sheet, the first copper sheet covers the upper surface, the lower surface, the inner side face and the outer side face of the lower end seal ring, and the thickness of the first copper sheet is set in the mode that when the upper end bears first axial pressure, the lower end seal ring deforms in the radial direction so that the part, distributed on the inner surface of the lower end seal ring, of the first copper sheet can butt against a center tube and the part, distributed on the outer surface of the lower end seal ring, of the first copper sheet can butt against the sleeve; an annular opening is formed in the edge, located on the upper surface of the lower end seal ring, of the first copper sheet. The lower end seal ring is covered with the first copper sheet, the degradation function on the rubber sleeve by high-temperature and high-pressure steam micromolecules is reduced or prevented, and the sealing long-term effect of the rubber sleeve 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 with an open copper sheath on the lower end sealing ring that can withstand high temperature and pressure used in the petroleum extraction 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, stratified transformation, stratified oil production, and mechanical pipeline water plugging. Packers need to be sealed in annulus to achieve Oil and gas are stratified, and the core component to achieve annulus isolation is the rubber tube. The bridge plug is also a commonly used tool for oil and gas stratification 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, acidification, and leak finding, while the b...

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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