Carboxyl Functionalized Carbon Nanotube and Its Effects on Set Cement

JIA Hui; JIN Xin; WEI Haoguang; LI Xiaojiang

doi:10.12358/j.issn.1001-5620.2024.05.011

Volume 41 Issue 5

Nov. 2024

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JIA Hui, JIN Xin, WEI Haoguang, et al.Carboxyl functionalized carbon nanotube and its effects on set cement[J]. Drilling Fluid & Completion Fluid，2024, 41（5）：640-645 doi: 10.12358/j.issn.1001-5620.2024.05.011

Citation:

JIA Hui, JIN Xin, WEI Haoguang, et al.Carboxyl functionalized carbon nanotube and its effects on set cement[J]. Drilling Fluid & Completion Fluid，2024, 41（5）：640-645 doi: 10.12358/j.issn.1001-5620.2024.05.011

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Carboxyl Functionalized Carbon Nanotube and Its Effects on Set Cement

doi: 10.12358/j.issn.1001-5620.2024.05.011

JIA Hui^{1, 2
,},
JIN Xin^{1, 2},
WEI Haoguang^{1, 2},
LI Xiaojiang^{1, 2}

1.
Sinopec Key Laboratory of Cementing and Completion, Beijing 102206
2.
Sinopec Research Institute of Petroleum Engineering Co., Ltd., Beijing 102206

Received Date: 2024-04-15
Rev Recd Date: 2024-06-02
Publish Date: 2024-11-07

Abstract

Abstract

With the continual development of unconventional oil and gas, complex downhole conditions have presented higher requirements on the various mechanical properties of set cement for well integrity, and these requirements have urged the development of high performance nanomaterials for improving the performance of the set cement. In this study, a carboxyl functionalized carbon nanotube dispersion was developed through dilute-acid acidization process. The dispersibility of the dispersion was measured by means of contact-angle measurement, UV-visible absorption spectroscopy as well as settling stability measurement etc., and the effect of the carboxyl functionalized carbon nanotube on improving the mechanical properties of set cement was verified. The study shows that carboxyl functionalization reduces the diameters of the carbon nanotube particles by 89.71%, and can convert a hydrophobic material to hydrophilic one. Carboxyl functionalization also improves the dispersion stability of the carbon nanotube by 100%. A cement slurry treated with 0.005% carboxyl functionalized carbon nanotube has the compressive strength of the set cement increased by 16.05%, the flexural strength by 25.82%, and the tensile strength by 18.07%.
- Carbon nanotube,
- Carboxyl,
- Set cement

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References(17)

References

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