METHODS TO INCREASE THE NUMBER OF FILTERS PER OPTICAL PATH IN A DOWNHOLE SPECTROMETER
摘要
<p>Downhole spectrometer tools are provided with two ways to increase the number of filters on an optical path. A first approach employs multiple filter wheels that rotate alternately in a common plane to intersect the optical path. Portions of the wheels are cut out to avoid mechanical interference between the wheels. A second approach drives the one or more filter wheels with a wobble that causes the filters to trace one or more hypocycloidal curves that each intersect the optical path.</p>
申请公布号
EP2697615(A4)
申请公布日期
2015.01.28
申请号
EP20110865983
申请日期
2011.05.24
申请人
HALLIBURTON ENERGY SERVICES, INC.
发明人
ZHANG, WEI;ATKINSON, ROBERT;PELLETIER, MICHAEL, T.;JONES, CHRISTOPHER, M.