Cartridges, Packers and Bridge Plugs Including Wire Seal Rings

Abstract

The invention relates to the field of sealing, in particularly to a rubber sleeve which can bear high temperature and high pressure and comprises a metal wire sealing ring, a packer and a bridge plug used in the oil exploitation industry. The rubber sleeve comprises the metal wire sealing ring and a fiber wire sealing ring, wherein the metal wire sealing ring and the fiber wire sealing ring abut against each other and are arranged on the lower portion. The metal wire sealing ring comprises a plurality of mutually intersecting metal wires and glue bonding the metal wires together. The fiber wire sealing ring comprises a plurality of fiber wires which mutually intersect and resist high temperature and high pressure and glue bonding the fiber wires together. When the metal wire sealing ring is arranged below the fiber wire sealing ring, axial pressure transmitted to the fiber wire sealing ring can be reduced due to the friction between the metal wire sealing ring and a central pipe and / or a sleeve pipe, and at the time axial pressure on the fiber wire sealing ring can be effectively reduced. The reason for generation of shoulder protrusion is too large axial pressure, so that generation of shoulder protrusion can be reduced or prevented through the design.

Description

technical field [0001] The present application relates to the field of sealing, in particular to a rubber cartridge including a wire sealing ring, a packer and a bridge plug used in the oil exploitation industry that can withstand high temperature and high pressure. 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, acidizing, leak-finding and other measures, while the bridg...

AI Technical Summary

Problems solved by technology

According to the inventor's test, when the first axial pressure was 30MPa, the inventor found that shoulders would appear in almost all rubber cartridges, and when the second axial pressure (such as 15MPa or 20MPa) was further applied, all the rubber cartridges would Can create splits at the shoulders, causing seal failure

[0008] Furthermore, the inventors have also found that even if the rubber cartridge can be temporarily sealed when the second axial pressure is applied, when bottomhole gas and other substances impact the rubber cartridge, the small molecules of high-temperature and high-pressure steam contained therein will have an impact on the polymer. The rubber cartridge of the material is degraded, causing the rubber cartridge to lose its elasticity at the lower end first and unable to play a sealing role, which affects the long-term performance of the rubber cartridge seal

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