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发明名称
CLAY-FREE BIODEGRADABLE DRILLING FLUID AND METHOD OF USING SAME
摘要
申请公布号
PL330156(A1)
申请公布日期
1999.04.26
申请号
PL19970330156
申请日期
1997.05.12
申请人
BAROID TECHNOLOGY,INC.
发明人
LIAO W.ANDREW
分类号
E21B21/00;C09K8/04;C09K8/08;(IPC1-7):C09K3/00
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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