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Aging test method of simulated packer rubber cylinder under actual working conditions

A technology of aging test and actual working conditions, applied in the direction of material inspection products, etc., can solve problems such as few reports, and achieve the effect of ensuring simulation and reproducibility, and significantly accelerating aging.

Inactive Publication Date: 2015-11-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are some deficiencies in the commonly used rubber aging test methods at present: first, some special rubbers, such as packer rubber barrel rubber, will be subject to greater stress during use, but rubber aging tests under stress conditions are not rarely reported
Second, the actual working temperature of the packer rubber cylinder can reach 150°C, and it is in a liquid medium, and it is difficult to achieve the aging of rubber in a liquid medium under high temperature conditions by ordinary rubber aging test methods

Method used

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  • Aging test method of simulated packer rubber cylinder under actual working conditions
  • Aging test method of simulated packer rubber cylinder under actual working conditions
  • Aging test method of simulated packer rubber cylinder under actual working conditions

Examples

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Effect test

Embodiment 1

[0039] The present invention relates to an aging test method for simulating a packer rubber cylinder under actual working conditions, specifically comprising the following steps:

[0040] Step 1, select the hydrogenated nitrile rubber material, and process it into a cylindrical rubber sample, the size of the preferred sample of the present invention is Φ29 * 12.5mm;

[0041] Step 2, prepare reaction device, the selected reaction device of the present invention comprises reactor and compression fixture, specifically combines figure 1 , figure 2 As shown, an aging test device for simulating the packer rubber cartridge under actual working conditions includes a reactor and a rubber compression fixture. The reactor includes a kettle body 3 and a cover for sealing the kettle body 3, and simulates During the test, the compression fixture is placed in the kettle body 3, and the simulation is performed by adding aging medium into the kettle body 3;

[0042] The compression fixture ...

Embodiment 2

[0048] The difference from Example 1 is that in step 4, the aging temperature of the hydrogenated nitrile rubber is 180°C, and the compression set changes with the aging time as follows: Figure 4 shown. It can be seen from the figure that at this temperature, as the aging time prolongs, the ε value of the rubber increases; Figure 4 and image 3 It can be seen that the compression set of rubber increases with the increase of temperature.

Embodiment 3

[0050] The difference from Example 1 is that in step 4, the aging temperature of the hydrogenated nitrile rubber is 200°C, and the compression set varies with the aging time as follows: Figure 5 shown. It can be seen from the figure that at this temperature, as the aging time prolongs, the ε value of the rubber increases; Figure 5 and Figure 4 , image 3 It can be seen that the ε value of HNBR increases with the increase of temperature.

[0051] The invention simulates the aging of rubber samples under actual working conditions indoors, and can study the aging performance and aging law of the rubber material of the packer rubber cylinder under the conditions of high temperature, stress and solution medium, and repeated tests prove that it has good reproducibility .

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Abstract

The invention discloses an aging test method for simulating a packer rubber sleeve under actual working conditions. The aging test method comprises the steps of machining hydrogenated nitrile rubber to be a rubber sample with certain size, applying stress to the sample, soaking the sample in a liquid aging medium, controlling the aging temperature, and performing an aging test with different days, so that the analysis on mechanical property and research on service life of the rubber sample are carried out. According to the aging test method, an aging test result similarly speculating rubber in actual environment can be simulated and accelerated in a lab; the remarkable aging acceleration is provided while the simulation and the reproducibility are ensured, and the acceleration can be up to tens of times; the aging test method can be applied to research on aging activity and rule of the packer rubber under actual working conditions, and also can be applied to the aging performance research of other types of rubber under corresponding environment.

Description

technical field [0001] The invention belongs to the technical field of aging simulation of packer rubber cylinders, and in particular relates to an aging test method for simulating packer rubber cylinders under actual working conditions. Background technique [0002] Rubber materials and their products have been widely used in petroleum, construction, automobile, aerospace and other fields due to their unique and excellent performance. Oil well packer is one of the important tools for downhole operations in the process of petroleum exploration and development. Packers are widely used in the production practice of various oil fields. The sealing element, the rubber cartridge, is the core component of the packer. However, the working conditions of the rubber cartridge are complex and harsh: high temperature, high pressure, in a corrosive medium, and also corroded by hydrogen sulfide, acid, etc. In this environment, the rubber material of the rubber cartridge will swell and ag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/44
Inventor 胡松青廉兵杰王志坤吕强张田田陈生辉
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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