Patent ID: 11867049
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Civil engineering (Other fields)
Classification: CPC E  G | IPC E

Claim 24:
25. The method of claim 15, wherein at least one of the first or second magnetic anchors comprises two permanent magnets connected in parallel between two ferromagnetic poles, with a first permanent magnet of the two permanent magnets having a higher coercivity or resistance than a second permanent magnet of the two permanent magnets, and
adjusting the one of the first or second magnetic anchors from the inactive state to the active state comprises:
controlling a power source of the respective first or second bodies to provide power to a coil of the second permanent magnet;
generating an external flux in a first direction through the second permanent magnet; and
extending at least a portion of one or more magnetic field lines from the two ferromagnetic poles to attach to the wellbore tubular.