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51318-11386-Study on the Corrosion Performance of C110 Tubing in Formate Completion Fluid at High Temperature

In this paper, the corrosion performance of C110 tubing is investigated in high-density formate completion fluid at 180 oC with different combinations of CO2 mixed and mechanical damage.

Product Number: 51318-11386-SG
Author: Dapeng Li / Lei Zhang / Xiuyun Wang / Zhiwen Yang / Xiaoqi Yue / Minxu Lu
Publication Date: 2018
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Recently, there are several cracking and severe localized corrosion failures of API 5CT Grade C110 tubing in high-density formate completion fluid at high temperature, where the temperature up to 180 oC, with the possibility of CO2 mixed, and mechanical damage on the tubing surface. In this paper, the corrosion performance of C110 tubing is investigated in high-density formate completion fluid at 180 oC with different combinations of CO2 mixed and mechanical damage, and the initiation and growth of cracking and localized corrosion are studied by scanning electron microscopy (SEM), , X-ray diffraction (XRD) and stereo microscope, considering the formate decomposition at high temperature, aiming to clarify the corrosion mechanism of C110 tubing in high-density formate completion fluid at high temperature.

Key words: formate completion fluid, high temperature, stress corrosion cracking, severe localized corrosion

Recently, there are several cracking and severe localized corrosion failures of API 5CT Grade C110 tubing in high-density formate completion fluid at high temperature, where the temperature up to 180 oC, with the possibility of CO2 mixed, and mechanical damage on the tubing surface. In this paper, the corrosion performance of C110 tubing is investigated in high-density formate completion fluid at 180 oC with different combinations of CO2 mixed and mechanical damage, and the initiation and growth of cracking and localized corrosion are studied by scanning electron microscopy (SEM), , X-ray diffraction (XRD) and stereo microscope, considering the formate decomposition at high temperature, aiming to clarify the corrosion mechanism of C110 tubing in high-density formate completion fluid at high temperature.

Key words: formate completion fluid, high temperature, stress corrosion cracking, severe localized corrosion

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