Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8126880 | Journal of Petroleum Science and Engineering | 2014 | 6 Pages |
Abstract
This paper analyzes the influence of carbon nanotubes (CNTs) on the rheological and mechanical properties of cement slurries used in oil wells. CNTs were grown directly onto the cement clinker by chemical vapor deposition. Cement pastes containing 0.1% and 0.3% of CNT bwoc were compared with CNT-free slurries. Lignosulfonate (0.2% bwoc) was used as dispersant in all cement slurries. Compressive and tensile strength were evaluated at the ages of 48Â h and 7 days. The results show that the addition of CNTs does not alter the rheological behavior and stability of the cement slurries considering the dispersant and concentrations employed. On the other hand, the presence of CNTs in the cement slurries increases the tensile strength by approximately 15% at 48Â h and 7 days of aging for 0.1% CNT bwoc.
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Authors
Júnia Nunes de Paula, José Márcio Calixto, Luiz Orlando Ladeira, Péter Ludvig, Tarcizo Cruz C. Souza, José Marcelo Rocha, Aline A. Vargas de Melo,