摘要：The borehole stability problems,such as borehole wash-out,stuck pipe,disintegration of cuttings,and bit balling,still occur in shale formations mostly due to hydration and swelling of water sensitive shale during the drilling.With the increasingly prominent environmental pollution problems,the environmental protection performance of drilling fluid is particularly important.A cation glucoside (CG) was synthesized with glucose and glycidyl triethyl ammonium chloride (GTA) and used as montmorillonite (MMT) swelling inhibiter in this work.The inhibition of CG was investigated by MMT linear expansion test and mud ball immersing test.The results showed that the CG has a good inhibition to the hydration swelling and dispersion of MMT.Under the same condition,the linear expansion rate of MMT in CG solution is much lower that of ethylglucoside and the hydration expansion degree of the mud ball in the CG solution was significantly inhibited.The characterizations of physic-chemical properties of particle,analysized by thermogravimetric analysis and scanning electron microscopy,revealed that CG play great role to prevent water from absorb and keep MMT in large particle size.The compatible with the common drilling fluid additives,CMC,was also investigated.
