Volume 37 Issue 3
Jun.  2020
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WANG Jianyao, TU Siqi, MEI Mingjia, XIN Haipeng, SUN Fuquan, ZOU Shuang. Mechanism Investigation and Performance Evaluation of Water Indispersible Cement Slurries[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(3): 358-362. doi: 10.3969/j.issn.1001-5620.2020.03.015
Citation: WANG Jianyao, TU Siqi, MEI Mingjia, XIN Haipeng, SUN Fuquan, ZOU Shuang. Mechanism Investigation and Performance Evaluation of Water Indispersible Cement Slurries[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(3): 358-362. doi: 10.3969/j.issn.1001-5620.2020.03.015
shu

Mechanism Investigation and Performance Evaluation of Water Indispersible Cement Slurries

doi: 10.3969/j.issn.1001-5620.2020.03.015

  • 1. CNPC Tianjin Boxing Engineering Science & Technology Co., Ltd. Tianjin 300451;

  • 2. CNPC Key Laboratory of Drilling Engineering;Laboratory of Cementing Technology, Tianjin 300451;

  • 3. National Engineering Laboratory of Petroleum Drilling Technology, Tianjin 300451;

  • 4. CCDC ChangQing Well Cementing Company, Xi'an, Shaanxi 710000

  • Received Date: 2019-12-16
  • Publish Date: 2020-06-28
    Abstract
  • The working mechanisms of water indispersible cement slurries are investigated in the light of colloidal stability theory, electric double layer compression theory and principle of bridging by adsorption. The bridging cohesion effect of an indispersible flocculant BCY-100S on cement particles was proved by SEM analysis. By evaluating the effects of many drag reducers on the rheology and dispersion resistance of water indispersible cement slurries, a drag reducer BCD-220S, which helps improve the rheology of cement slurry and does not affect the dispersion resistance of the same, was selected. Three water indispersible cement slurries with water/cement ratio of 0.45, 0.47 and 0.50, respectively, were tested for their dispersion resistance, mechanical performance and comprehensive performance under 30-80℃. It was found that increase in water/cement ratio did not affect the dispersion resistance of the water indispersible cement slurries. The water indispersible cement slurries had free water of 0 mL, density difference of the top and the bottom cement slurries of less than 0.03 g/cm3, mobility of greater than 20 mL, filtration rate that can be controlled in less than 50 mL, and mechanical properties that satisfied operation requirements.

     

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