Volume 35 Issue 6
Nov.  2018
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WANG Jinfen, GENG Dongshi, YI Xiaoling, MA Junhan, JIANG Luming, HE Lipeng. Study on the Evaluating Standard of Drilling Bentonite[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(6): 37-41. doi: 10.3969/j.issn.1001-5620.2018.06.007
Citation: WANG Jinfen, GENG Dongshi, YI Xiaoling, MA Junhan, JIANG Luming, HE Lipeng. Study on the Evaluating Standard of Drilling Bentonite[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(6): 37-41. doi: 10.3969/j.issn.1001-5620.2018.06.007

Study on the Evaluating Standard of Drilling Bentonite

doi: 10.3969/j.issn.1001-5620.2018.06.007
  • Received Date: 2018-09-13
  • Publish Date: 2018-11-30
  • The quality of bentonite not only affects the performance of the drilling fluids made; it also affects the compatibility of the bentonite slurry with other mud chemicals. It is economically unreasonably to formulate drilling fluids with bentonite of poor quality because too much bentonite and chemicals will be consumed to formulate a drilling fluid of the same properties. Property differences between several drilling grade bentonites, OCMA clays and naturally obtained sodium bentonite, artificial sodium bentonite have been studied in laboratory under room temperature and high temperatures (120, 150and 180℃). Problems that may arise in field use of drilling grade bentonite and OCMA clay were investigated. It has been shown that the technical indices in bentonite evaluating standards currently in use are not able to meet the requirements of evaluating the bentonites in use presently. The paper further suggests that apparent viscosity of bentonite suspension being aged at elevated temperatures should be used as a criterion to control the quality of drilling bentonite.

     

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