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Cartridges, Packers and Bridge Plugs Including Wire Seal Rings

A sealing ring and wire technology, used in sealing/isolation, wellbore/well components, earth-moving drilling, etc., can solve the problems of cracking, sealing failure, and loss of elasticity of the rubber tube, and increase the compressive strength. range, effect of increasing compressive strength, increasing structural stiffness

Active Publication Date: 2019-06-18
TIANDING SEALING TECH BEIJING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Cartridges, Packers and Bridge Plugs Including Wire Seal Rings
  • Cartridges, Packers and Bridge Plugs Including Wire Seal Rings
  • Cartridges, Packers and Bridge Plugs Including Wire Seal Rings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0057] The directions "up" and "down" described below are based on figure 2 described as a reference.

[0058] like figure 1 The compression packer 200 is shown with the cartridge 10 of the present application. The compression packer 200 is connected to the base pipe 30 and placed in the casing 40 . The compression packer 200 needs to separate different oil layers and water layers in the wellbore and withstand a certain pressure difference. Get out smoothly.

[0059] like figure 2 As shown, the rubber cartridge 10 is located in the annular space formed by the sleeve 40 and the central tube 30, and the rigid spacer ring 50 provides the first axial pressure F from top to bottom (ie, the first axial direction A) in the axial direction. 1 , in other embodiments, the rigid spacer ring 50 can also be removed and the first axial pressure F can be applied to the rubber cartridge 10 1 other components instead. like figure 2 As shown, the two ends of the rubber cartridge 10 a...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/128E21B33/134
CPCE21B33/128E21B33/134
Inventor 宋炜隆学武
Owner TIANDING SEALING TECH BEIJING CO LTD
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