发明名称 High temperature downhole tool
摘要 Apparatus and method for estimating a downhole parameter include a high-gain semiconductor device having a plurality of semiconductor layers forming an active region, the active region having a bandgap offset that provides device operation through at least the temperature environment of a downhole location, the high-gain semiconductor device being used at least in part to estimate a downhole parameter.
申请公布号 US7638761(B2) 申请公布日期 2009.12.29
申请号 US20070837692 申请日期 2007.08.13
申请人 BAKER HUGHES INCORPORATED 发明人 CSUTAK SEBASTIAN
分类号 G01V5/04 主分类号 G01V5/04
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