The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 2012
Filed:
Dec. 18, 2009
James Simek, Sandy, UT (US);
Jed Ludlow, Bountiful, UT (US);
John H. Flora, Lynchburg, VA (US);
Syed M. Ali, Lynchburg, VA (US);
Huidong Gao, Forest, VA (US);
James Simek, Sandy, UT (US);
Jed Ludlow, Bountiful, UT (US);
John H. Flora, Lynchburg, VA (US);
Syed M. Ali, Lynchburg, VA (US);
Huidong Gao, Forest, VA (US);
TDW Delaware Inc., Wilmington, DE (US);
Abstract
A pipeline inspection tool includes two pole magnets oriented at an oblique angle relative to the central longitudinal axis of the tool body. An array of sensor coil sets is located between opposing edges of the two pole magnets and oriented perpendicular to the central longitudinal axis. Each sensor coil set includes a transmitter coil and two opposing pairs of receiver coils that are gated to receive reflections from the wall of a tubular member. Because the line of sensor coils is rotated relative to the magnetic bias field, the receiver coils are in-line with, and have the same angular orientation as, the transmitter coil. The tool provides improved sensitivity to small defects, substantial decrease in RF pulser power requirements, full circumferential coverage, self-calibration of the transmitted signals, and less interference between transmitter coils caused by acoustic ring around.