Volume 38 Issue 5
Sep.  2021
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ZHAO Chong, ZHANG Xianbin, QIU Zhengsong, et al.Synthesis of liquid tall oil asphalt amide resin and evaluation of its filtration control performance[J]. Drilling Fluid & Completion Fluid,2021, 38(5):616-622 doi: 10.12358/j.issn.1001-5620.2021.05.012
Citation: ZHAO Chong, ZHANG Xianbin, QIU Zhengsong, et al.Synthesis of liquid tall oil asphalt amide resin and evaluation of its filtration control performance[J]. Drilling Fluid & Completion Fluid,2021, 38(5):616-622 doi: 10.12358/j.issn.1001-5620.2021.05.012

Synthesis of Liquid Tall Oil Asphalt Amide Resin and Evaluation of Its Filtration Control Performance

doi: 10.12358/j.issn.1001-5620.2021.05.012
  • Received Date: 2021-04-21
  • Accepted Date: 2020-03-11
  • Available Online: 2021-11-30
  • Publish Date: 2021-09-30
  • To minimize the negative effects of conventional asphalt filter loss reducers on the environment and to enhance the plugging capacity of oil based drilling fluids at elevated temperatures, a liquid filter loss reducer BZ-FLA was produced by stepwise modifying a tall oil asphalt (a tail from natural oil processing) with maleic anhydride (MA) and polyamine, and then dissolving the product of the modification in an environmentally friendly solvent oil. IR spectroscopy and NMR analyses have proved that the final product of the aforementioned reaction, BZ-FLA, is a crosslinking tall oil asphalt amide resin which is a condensate of MA modified resin acid and polyamines. Evaluation of the performance of a typical oil based drilling fluid and a clay-free oil based drilling fluid both treated with BZ-FLA showed that BZ-FLA functions well at temperatures as high as 180 ℃. Filter loss of the typical oil based drilling fluid treated with 0.75%-1.0% BZ-FLA is less than 4.0 mL, comparable to the filtration control performance of 3% conventional asphalt filter loss reducer. Oil based drilling fluids treated with BZ-FLA, asphalt and lignite filter loss reducers exhibit enhanced plugging capacity. BZ-FLA is also equally effective in reducing filtration rate of clay-free oil based drilling fluids.

     

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