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Author(s): |
Fa-lin Wei, Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China
Yu-zhang Liu, Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China
Chun-ming Xiong, Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China |
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Abstract: |
To obtain higher rate of thixotropic recovery after breaking down and higher thixotropic strength emphasized in certain fields, a new aluminum magnesium hydroxide / montmorillonite-based suspension was prepared and its unique thixotropic behavior was studied. It was found that the broken down structure could recover rapidly up to over 200Pa within 20 seconds in the range of temperature and shear rate investigated. Compared with other thixotropic materials, such as MMH and Ti/HEC suspension, the MMH/MT suspension exhibited higher rate of thixotropic recovery and higher thixotropic strength. The higher recovery rate was identified by SEM technology as well. Furthermore, the recovery rate and thixotropic strength had positive correlation to temperature and shear rate, which would be favor of some certain applications.
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