公开(公告)号：US20210238929A1

公开(公告)日：2021-08-05

申请号：US17237327

申请日：2021-04-22

Applicant: SHELL OIL COMPANY

Inventor： Dhruv ARORA ,  Matheus Norbertus BAAIJENS ,  Stephen Palmer HIRSHBLOND ,  Derrick MELANSON ,  Brian Kelly MCCOY

IPC: E21B17/00 ,  E21B47/092 ,  E21B47/135

Abstract: A system for providing information through a metal wall employs a device adapted to be arranged on one side of the metal wall and a magnetic-permeability element, provided at, near or connected to the device. The magnetic-permeability element is based on a material having a relative magnetic permeability of at least 2000. The disclosure also provides use of said system. The use may involve the step of optimizing the magnetic-permeability element using equivalent inductive mass (EIm). The system can for example be used to magnetically sense the location of a cable present on the outside of a wellbore tubular using a magetic orienting tool that is located within the wellbore tubular.