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预胶化淀粉(PGS)是一种淀粉衍生物,是近年来最新开发的泥浆降失水剂。煤炭科学院地质勘探分院研制生产的预胶化淀粉,性能指标已全部达到国际 OCMA 标准,1987年在河南偃龙煤田进行生产试验时,取得很好的效果,现将应用试验情况介绍如下:(一)偃龙煤田的施工特点偃龙煤田位于嵩山山脉北侧。所试钻孔——6606孔,实际孔深803m。钻孔所穿越
Pregelatinized starch (PGS) is a starch derivative, is the latest development of mud fluid loss agent in recent years. The pregelatinized starch developed and produced by the Bureau of Geological Prospecting of the Academy of Coal Science has all achieved the international OCMA standards. In 1987, when the production test was conducted at the Yanlong Coalfield in Henan Province, good results were obtained. The application of test conditions is described as follows ) Construction Characteristics of Yanlong Coalfield Yanlong Coalfield is located on the north side of Songshan Mountain Range. The hole drilled - 6,606 holes, the actual hole depth 803m. Through the hole