Volume 34 Issue 3
May  2017
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CHEN Guang, LIU Xiujun, SONG Jianming, ZHOU Sibing, CAO Letao, LEI Yan, GUO Zongzong, DUAN Fulin. Use Butylated Hydroxyanisole to Improve High Temperature Stability of Flushing Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(3): 81-84. doi: 10.3969/j.issn.1001-5620.2017.03.016
Citation: CHEN Guang, LIU Xiujun, SONG Jianming, ZHOU Sibing, CAO Letao, LEI Yan, GUO Zongzong, DUAN Fulin. Use Butylated Hydroxyanisole to Improve High Temperature Stability of Flushing Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(3): 81-84. doi: 10.3969/j.issn.1001-5620.2017.03.016

Use Butylated Hydroxyanisole to Improve High Temperature Stability of Flushing Fluid

doi: 10.3969/j.issn.1001-5620.2017.03.016
  • Received Date: 2017-03-05
  • Publish Date: 2017-05-31
  • Oil base drilling fluids (OBMs) are widely used because of their high temperature stability, resistance to salt and calcium contamination, good lubricity and low filtration rate, the problems of using OBMs are difficulty in cleaning them off the borehole wall and casing string and being ready to flocculate, thus negatively affecting the quality of well cementing. To effectively flush residue OBMs off the borehole wall and the surface of casing strings, a water base flushing fluid, TGD-65, was formulated, with furfuraldehyde as flushing additive. BHA, a high temperature stabilizer for furfur-aldehyde was used for the flushing fluid (called TGD-60) to work at elevated temperatures. Experimental results showed that BHA had the ability to enhance the high temperature stability of furfur-aldehyde, rendering TGD-60 good emulsification dispersion to OBM at 160℃, completely breaking the structure of OBM to small-sized droplets. The OBM was finally turned into oil-in-water emulsion. Meanwhile the flushing fluid after high temperature treatment had good wettability to the mud cakes formed by OBM, and the flushing efficiency at high temperatures was enhanced from 79.71% to 99.18%.

     

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