结果表明，改性木质素磺酸盐具有较好的减水性能，且达到高效减水剂的减水性能。
The results show that the modified lignosulfonate has a better water-reducing performance as effectively as high grade concrete water reducing agent.
介绍了改性木质素磺酸盐PQ的合成工艺，评价了PQ对水泥浆稠化时间的影响及在高密度体系中的应用，同时考察了PQ对温度的敏感性。
The compounding technique of PQ was described and its influences to cement thickening time and application in high density cement system were evaluated, as well as its temperature sensitivity.
结果表明，不论在淡水泥浆还是盐水泥浆中，改性腐殖酸的稀释效果都比铁铬木质素磺酸盐要好，是一种比较理想的钻井泥浆稀释剂。
It shows the thinner of modified humic acid to be better than Fe_Cr lignosulphonates. It is a ideal thinner for drilling mud.
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