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:
Apr. 17, 2018
Filed:
Sep. 25, 2017
Geoprober Drilling Limited, Aberdeen, GB;
Andrew Brown, Aberdeen, GB;
Matthew Taylor, Aberdeen, GB;
Abstract
The present invention provides an apparatus for locating and positioning oilwell tool joints. This invention is particularly useful when the apparatus is placed near a Blowout Preventer (BOP) because it can be used to make sure that a tool joint is not present between the BOP rams. In some embodiments, the invention makes use of magnetic flux creation and detection by electromagnetic coils while a portion of the riser is magnetically saturated by powerful permanent magnets. Different configurations of the driving and sensing coils are possible so that it is possible to locate the tool joints longitudinally and radially within the apparatus. The apparatus is easily retrofitted to existing risers without altering ongoing operations because it can be opened before installation and closed once installed.