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drilling fluid additive composition suitable for coal-bed gas wells, and water-based drilling fluid and use thereof
发布时间：2021-07-20
授权号：ZLUS 9902890 B1
授权日期：2018-02-27 00:00:00
申请号：US 9902890 B1
发明作者：蒋官澄,贺垠博,刘冲,葛庆颖,杨丽丽,王勇,张永清,王照辉,程琳,胡景东,高德利,孙海芳,王玺
专利状态：专利授权
专利类型：发明专利
专利名称：drilling fluid additive composition suitable for coal-bed gas wells, and water-based drilling fluid and use thereof
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