发明名称 METHOD AND APPARATUS FOR DOWNHOLE SPECTROSCOPY
摘要 Apparatus and method for estimating a property of a downhole fluid including a carrier that is conveyed in a borehole, and a semiconductor electromagnetic energy source carried by the carrier, the semiconductor electromagnetic energy source having an active region that includes one or more nitride-based barrier layers that are modulation-doped using a nitride-based doped layer.
申请公布号 WO2009140387(A3) 申请公布日期 2010.03.11
申请号 WO2009US43791 申请日期 2009.05.13
申请人 BAKER HUGHES INCORPORATED;CSUTAK, SEBASTIAN 发明人 CSUTAK, SEBASTIAN
分类号 E21B49/08;G01V3/26;G01V8/10 主分类号 E21B49/08
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