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Configuration design of detector shielding for wireline and MWD/LWD down-hole thermal neutron porosity tools
Configuration design of detector shielding for wireline and MWD/LWD down-hole thermal neutron porosity tools
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机译:电缆和MWD / LWD井下热中子孔隙度仪探测器屏蔽的配置设计
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摘要
An apparatus for estimating a property of an earth formation penetrated by a borehole, the apparatus includes: a carrier configured to be conveyed through the borehole; a neutron source disposed at the carrier and configured to irradiate the earth formation with neutrons; a neutron detector disposed at the carrier and configured to detect neutrons reflected by the earth formation to the detector; a neutron reflector disposed partially around the detector, an area of the detector not covered by the reflector being configured to admit the reflected neutrons; and a neutron absorber disposed at least around the reflector.
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