Invention Grant
- Patent Title: Method for magnetizing casing string tubulars
- Patent Title (中): 磁化套管柱管的方法
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Application No.: US12422347Application Date: 2009-04-13
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Publication No.: US07679480B2Publication Date: 2010-03-16
- Inventor: Kenneth Stenerson , Leon Ceh , Graham A. McElhinney
- Applicant: Kenneth Stenerson , Leon Ceh , Graham A. McElhinney
- Applicant Address: US TX Houston
- Assignee: Smith International, Inc.
- Current Assignee: Smith International, Inc.
- Current Assignee Address: US TX Houston
- Main IPC: H01F7/20
- IPC: H01F7/20 ; H01F13/00 ; G01V3/08 ; G01V3/00

Abstract:
A method for magnetizing a wellbore tubular includes a positioning a wellbore tubular substantially coaxially in a plurality of longitudinally spaced magnetizing coils deployed on a frame. The coils are selectively connected and disconnected from electrical power such that a circumferential electrical current flows in each of the coils to impart a predetermined magnetic field pattern to the tubular. Exemplary embodiments of this invention provide for semi-automated control of tubular magnetization and thereby enable a repeatable magnetic pattern to be imparted to each of a large number of wellbore tubulars.
Public/Granted literature
- US20090195340A1 Method for Magnetizing Casing String Tubulars Public/Granted day:2009-08-06
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