Volume 47 Issue 2
Apr.  2019
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CHEN Xiaohua, ZHANG Fuming, ZHAO Hu, DAI Dan, WANG Xueshan. The Development and Properties of PC–W31L Flushing Fluid for Oil-Based Drilling Fluid[J]. Petroleum Drilling Techniques, 2019, 47(2): 81-86. DOI: 10.11911/syztjs.2019015
Citation: CHEN Xiaohua, ZHANG Fuming, ZHAO Hu, DAI Dan, WANG Xueshan. The Development and Properties of PC–W31L Flushing Fluid for Oil-Based Drilling Fluid[J]. Petroleum Drilling Techniques, 2019, 47(2): 81-86. DOI: 10.11911/syztjs.2019015
shu

The Development and Properties of PC–W31L Flushing Fluid for Oil-Based Drilling Fluid

  • 1.

    Division of Oilfield Chemicals, China Oilfield Services Limited, Sanhe, Hebei, 065201, China

  • 2.

    Oilfield Chemical Research Institute, China Oilfield Service Limited, Sanhe, Hebei, 065201, China

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  • Received Date: June 16, 2018
  • Revised Date: December 23, 2018
  • Available Online: April 18, 2019
    Graphical Abstract
    • Abstract

  • We address the problem of not being able to detect the conductivity change of mixed liquid (oil-based drilling fluid and flushing fluid) in oil-based drilling fluid. Flushed by oil-in-water based flushing fluid with the wetting tester, the proper surfactant and solvent were optimized and compounded, and a nitrogen-containing polymer was introduced to develop the PC–W31L flushing fluid for oil-based drilling fluid. The flushing mechanism of this fluid on oil-based drilling fluid was analyzed and its performance was evaluated. The results showed that the flushing effect of PC–W31L flushing liquid on oil-based drilling fluid was optimal, the flushing interface was in water wet state, which can completely transform oil-based drilling fluid from the oil continuous phase to the water continuous phase. The rheology compatibility of this fluid is better with oil-based drilling fluid and cement slurry respectively, and its influences on the thickening time and strength of cement slurry are all within the controllable range. The results of performance evaluation indicated that PC–W31L flushing liquid not only had a good flushing effect on oil-based drilling fluid, but also allowed the wetting tester to detect its water wetting capacity.

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    • References (12)
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    Serial Number：CN 11-1763/TE, ISSN 1001-0890

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