Experimental Study on the Impact of Corrosion on the Rubber in Packers in a CO2 Injection Well

Zhu Dajiang; Lin Yuanhua; Zou Dapeng; Wang Feng; Zhang Deping; Zhang Ping

doi:10.11911/syztjs.201405023

Volume 42 Issue 5

Sep. 2014

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Petroleum Drilling Techniques > 2014 > 42(5): 126-130. > DOI: 10.11911/syztjs.201405023

Zhu Dajiang, Lin Yuanhua, Zou Dapeng, Wang Feng, Zhang Deping, Zhang Ping. Experimental Study on the Impact of Corrosion on the Rubber in Packers in a CO2 Injection Well[J]. Petroleum Drilling Techniques, 2014, 42(5): 126-130. DOI: 10.11911/syztjs.201405023

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Experimental Study on the Impact of Corrosion on the Rubber in Packers in a CO2 Injection Well

1.
Key Lab for Mechanical and Environmental Behavior of Tubular Goods of CNPC(Southwest Petroleum University), Chengdu, Sichuan, 610500, China;
2.
PetroChina Jilin Oilfield Company, Songyuan, Jilin, 138000, China;
3.
School of Mechatronical Engineering, Southwest Petroleum University, Chengdu, Sichuan, 610500, China

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Received Date: April 08, 2014
Revised Date: August 10, 2014

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Abstract

As the core part of the packer,packer rubber has direct relationship with the sealing function of packer.CO2 corrosion on the rubber material can cause sealing failures and induce sustained casing pressure,thus affecting the safety of production of a CO2 injection well.Corrosion experiments were conducted on NBR and HNBR under simulated environment in high temperature high pressure autoclave.Comparisons were made on the mechanic performances and shape of the rubber materials through corrosion of gas and liquid phase.Results showed that the tensile properties of nitrile rubber and HNBR decreased significantly and the hardness was also reduced after corrosion.The corrosion in the liquid phase environment was much more severe than that in the gaseous phase environment.Effects of actual conditions on the mechanic performances of rubber materials,instead of the mechanical performance under its initial state,should be considered in making engineering design.The research results can provide references for the selection of rubber material in CO2 injection well.
- gas injection well,
- packer rubber,
- rubber,
- carbon dioxide corrosion,
- laboratory testing

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Experimental Study on the Impact of Corrosion on the Rubber in Packers in a CO2 Injection Well

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