Volume 40 Issue 3
May  2023
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2023  >  40(3): 313-318
ZHENG Bin.The synthesis and application of an environmentally friendly high temperature graft oligosaccharide filter loss reducer[J]. Drilling Fluid & Completion Fluid，2023, 40（3）：313-318 doi: 10.12358/j.issn.1001-5620.2023.03.005
Citation: ZHENG Bin.The synthesis and application of an environmentally friendly high temperature graft oligosaccharide filter loss reducer[J]. Drilling Fluid & Completion Fluid，2023, 40（3）：313-318 doi: 10.12358/j.issn.1001-5620.2023.03.005
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The Synthesis and Application of an Environmentally Friendly High Temperature Graft Oligosaccharide Filter Loss Reducer

doi: 10.12358/j.issn.1001-5620.2023.03.005

  • Drilling Fluid Company, Great Wall Drilling Engineering Corporation Limited of CNPC, Panjin, Liaoning 124011

  • Received Date: 2023-01-13
  • Rev Recd Date: 2023-02-21
    • Available Online: 2023-07-21
  • Publish Date: 2023-05-30
    Abstract
  • A graft oligosaccharide filter loss reducer CG-FL was developed through inverse emulsion with starch derivative oligosaccharide as the raw material, acrylamide, 2-acrylamide-2-methapropyl sulfonic acid and N-vinyl pyrrolidone as the graft monomers and AIBN as the initiator. The molecular structure of the filter loss reducer CG-FL was characterized by FTIR, SEM and TGA etc. The biotoxicity EC50, biodegradation capacity and heavy metal contents of CG-FL were examined. The performance of CG-FL in drilling fluids was evaluated by performance comparison of single additive, performance comparison of different drilling fluids formulated in laboratory with CG-FL and other additives, as well as field application. Laboratory evaluation of CG-FL showed that CG-FL functions normally at temperatures up to 180 ℃, it is resistant to contamination by 15% salt. CG-FL has good dispersibility and compatibility with other additives. In comparison experiment, CG-FL showed better properties than the counter additives. Field application showed that CG-FL reduced the filtration rate of the drilling fluids, and the drilling fluids, after treatment, showed stable properties, no foaming or carbonization of the additive has occurred.

     

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