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1.发明授权Method for minimizing mud solids invasion of core samples obtained during subsurface coring 失效在地下取芯期间获得的核心样品的泥浆固体侵入最小化的方法
公开(公告)号：US4848487A
公开(公告)日：1989-07-18
申请号：US213810
申请日：1988-06-30
CPC分类号： E21B25/08 , C09K8/035 , C09K8/5086
摘要： A core sample of an earth formation is obtained by drilling with a coring bit and circulating a coring fluid through the coring bit. The coring fluid contains no mud solids for contaminating the core sample or, in the alternative, contains drilling mud mixed with a bulk material which invades the core sample and occupies the core sample pore spaces preferentially over mud solids. This bulk material is more readily removed from the core sample by cleaning than mud solids.
摘要翻译： 通过用取芯钻进钻孔并使取芯流体通过取芯钻头获得地层岩心样品。 取芯液不含泥浆，用于污染核心样品，或者替代地，含有与大量材料混合的钻井泥浆，这些泥浆侵入核心样品并优先占据泥浆固体物质的核心样品孔隙。 这种散装材料通过清洁比泥浆固体更容易地从核心样品中除去。
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