公开(公告)号：US20160116625A1

公开(公告)日：2016-04-28

申请号：US14919874

申请日：2015-10-22

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Martin G. Luling ,  Mohamed Jaidane

IPC: G01V3/28

CPC classification number: G01V3/28 ,  H01F38/30

Abstract: A downhole device may include a closed ring of ferromagnetic material mounted on a conductive pipe. The downhole device may also include a first coil spirally wound around the closed ring comprising an electrically conductive flat metallic strip to substantially cover the closed ring.

Abstract translation: 井下装置可以包括安装在导电管上的铁磁材料的封闭环。 井下装置还可以包括围绕闭环螺旋地卷绕的第一线圈，包括导电的扁平金属条，以基本上覆盖封闭环。

公开(公告)号：US10120098B2

公开(公告)日：2018-11-06

申请号：US14919874

申请日：2015-10-22

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Martin G. Luling ,  Mohamed Jaidane

IPC: G01V3/28 ,  H01F38/30

Abstract: A downhole device may include a closed ring of ferromagnetic material mounted on a conductive pipe. The downhole device may also include a first coil spirally wound around the closed ring comprising an electrically conductive flat metallic strip to substantially cover the closed ring.