发明名称 Externally Guided and Directed Halbach Array Field Induction Resistivity Tool
摘要 In one aspect of the invention an induction resistivity tool incorporated into a downhole tool string comprises an outer wall of a downhole component having an outer diameter. At least one induction transmitter assembly is disposed along the outer diameter. The transmitter assembly comprises at least one coil array and at least one induction transmitter coil wound about at least one core. The coil array comprises a plurality of magnetic units and each unit comprising a magnetic field orientation. The magnetic field orientations accumulatively form a Halbach array with an augmented field side and a canceled field side of the array. The transmitter assembly generates an induction signal from outside the outer wall and substantially prevents the signal from entering the outer wall when the transmitter assembly is carrying an electrical current.
申请公布号 US2008265894(A1) 申请公布日期 2008.10.30
申请号 US20070776484 申请日期 2007.07.11
申请人 SNYDER HAROLD L;TURNER PAULA 发明人 SNYDER HAROLD L.;TURNER PAULA
分类号 G01V3/18;G01V3/30;H01F27/32 主分类号 G01V3/18
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