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CHENG Bingfang, WANG Chengjun, BU Fankang, et al.Research on class structural environmentally friendly emulsifiers for oil-based drilling fluids[J]. Drilling Fluid & Completion Fluid，2026, 43（0）：1-6
Citation: CHENG Bingfang, WANG Chengjun, BU Fankang, et al.Research on class structural environmentally friendly emulsifiers for oil-based drilling fluids[J]. Drilling Fluid & Completion Fluid，2026, 43（0）：1-6
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Research on Class Structural Environmentally Friendly Emulsifiers for Oil-based Drilling Fluids

  • Sinopec Shengli Petroleum Engineering Co., Ltd., Dongying, Shandong 257000

  • Received Date: 2025-09-03
  • Rev Recd Date: 2025-10-21
    • Available Online: 2026-01-28
    Abstract
  • Using environmentally friendly ester derivatives such as epoxy fatty acid esters as raw materials, react with polyamines to form a main emulsifier with a Gemini surfactant structure. Then, using the main emulsifier as raw material, partially sulfonate it to form a multi class environmentally friendly emulsifier with a similar structure for oil-based drilling fluids. The molecular structure of the emulsifier was determined through infrared and mass spectrometry characterization, with a temperature resistance of up to 180℃, a demulsification voltage of over 900V, and an emulsification rate of over 90%. Capable of adapting to low oil-water ratio oil-based drilling fluid environments and drilling fluid systems formulated with different base oils. Adapt to drilling fluid systems with different densities. Has excellent biodegradability. A method for evaluating the microstructure of emulsion droplets was established to determine the stability of emulsion droplet formation, and it was determined that high emulsifier dosage can effectively improve the uniformity and high-temperature stability of oil in water emulsion droplets.

     

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