Volume 42 Issue 4
Jul.  2025
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LI Xiaolin, WANG Qike, XU Yixin, et al.Preparation and performance evaluation of a solid anti-channeling toughening agent[J]. Drilling Fluid & Completion Fluid，2025, 42（4）：537-545 doi: 10.12358/j.issn.1001-5620.2025.04.014
Citation: LI Xiaolin, WANG Qike, XU Yixin, et al.Preparation and performance evaluation of a solid anti-channeling toughening agent[J]. Drilling Fluid & Completion Fluid，2025, 42（4）：537-545 doi: 10.12358/j.issn.1001-5620.2025.04.014
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Preparation and Performance Evaluation of a Solid Anti-channeling Toughening Agent

doi: 10.12358/j.issn.1001-5620.2025.04.014

  • NO.2 Cementing Company, BHDC, Tianjin 300280

  • Received Date: 2025-02-10
  • Rev Recd Date: 2025-05-08
  • Publish Date: 2025-07-31
    Abstract
  • Styrene butadiene latex used in oil well cement has several shortcomings such as poor storage stability, high concentration required and high labor intensity in cement slurry mixing, etc. To deal with these problems, a solid powdered re-dispersible latex SISBR has been synthesized by introducing sodium p-styrenesulfonate and itaconic acid into the styrene butadiene latex to improve its high temperature stability, salt resistance and hydrophilicity. The effects of the amount of the itaconic acid on the properties of the latex were studied. The latex powders were characterized with IR spectroscopy, Zeta potential measurement, transmission electron microscope and ultraviolet-visible light absorption spectrum, and the high temperature stability and salt resistance of the latex SISBR were evaluated. Laboratory experimental results show that the modified carboxylated styrenesulfonate latex powders can be evenly dispersed in water and have good high temperature stability and excellent dispersibility. The introduction of the sulfonic acid groups and carboxyl groups increases the rigidity of the latex molecules. At an itaconic acid concentration of 3%, SISBR stays stable at 260 °C or higher and has excellent salt resistance. SISBR powders can evenly disperse in a cement slurry and can significantly improve the rheology of the cement slurry. SISBR also has good filming property and filling effect. A set cement containing 2.4% SISBR-3 latex powders can have its mechanical property most remarkably improved, and the cement slurry modified with the SISBR-3 has excellent elasticity, toughness and anti-channeling property.

     

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