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:
Aug. 08, 2017
Filed:
Feb. 25, 2015
Applicant:
Onesubsea Ip Uk Limited, London, GB;
Inventor:
Audun Magne Askeland, Bergen, NO;
Assignee:
ONESUBSEA IP UK LIMITED, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 47/00 (2012.01); G05B 23/02 (2006.01); E21B 43/12 (2006.01);
U.S. Cl.
CPC ...
G05B 23/0256 (2013.01); E21B 43/128 (2013.01); E21B 47/0007 (2013.01);
Abstract
To enable any measurement through the galvanic isolation of a subsea transformer, a topside system is used apply an AC voltage thereby generating a flux is the transformer core. The test is preferably done prior to any rotation in a subsea motor installed 'behind' the transformer. Therefore, the voltage and frequency combination is be selected such that the torque produced is insufficient to rotate the motor. Impedance amplitude and phase are measured and then comparing the results of modeled fault scenarios. Faults such as, open circuits, short circuits, and loss of phase(s) can be detected prior to startup.