发明授权
- 专利标题: Oil-soluble tracer solutions containing gadolinium compounds
- 专利标题(中): 含有钆化合物的油溶性示踪剂溶液
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申请号: US8698申请日: 1998-01-19
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公开(公告)号: US6001280A公开(公告)日: 1999-12-14
- 发明人: Timothy G. J. Jones
- 申请人: Timothy G. J. Jones
- 申请人地址: CT Ridgefield
- 专利权人: Schlumberger Technology Corporation
- 当前专利权人: Schlumberger Technology Corporation
- 当前专利权人地址: CT Ridgefield
- 主分类号: C07C53/126
- IPC分类号: C07C53/126 ; C07C53/128 ; E21B47/10 ; G01N31/00 ; C09K11/00 ; G01V5/00 ; H01B1/00 ; H01B1/06
摘要:
A tracer solution suitable for use in measuring flow velocities in a borehole, includes: a) a gadolinium salt of a carboxylic acid of general formula ##STR1## where R is an alkyl of not less than four carbon atoms, typically C4 or C5 alkyl, and R.sub.1 and R.sub.2 are hydrogen or an alkyl group, typically hydrogen, methyl or ethyl; b) a free branched-chain carboxylic acid such as an excess of the acid used to form the Gd salt; and c) a non-polar solvent such as hexane or heptane. The Gd content of the solution should be not less than about 50 g/l and is best when it is as high as possible, for example greater than 100 g/l, and the viscosity should be less than 20 cP.
公开/授权文献
- US5421214A Air sampler for clean rooms 公开/授权日:1995-06-06