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:
Dec. 31, 2019
Filed:
Jun. 12, 2015
Beijing Nano Tesla Technology Co. Ltd, Beijing, CN;
BEIJING NANA TESLA TECHNOLOGY CO. LTD, Beijing, CN;
Abstract
A rotating magnetic field range finder for measuring relative distance in drilling, comprising a permanent magnet steel drill collar (), an underground detector () and a ground interface box (). The permanent magnet steel drill collar () is fixed to the rear part of a drill bit and rotates together with the drill bit to generate a rotating magnetic field to provide a magnetic field signal source. The underground detector () comprises two tri-axial fluxgates and three accelerometers. The ground interface box () is used for processing the obtained data, and powering the underground detector. The permanent magnet steel drill collar () is an obliquely arranged one or a perpendicularly-and-parallelly assembled one. A measuring method for magnetic range measurement is also disclosed.