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. 16, 2016
Filed:
Aug. 08, 2013
Vetco Gray Inc., Houston, TX (US);
Yuri Alexeyevich Plotnikov, Niskayuna, NY (US);
Teresa Chen-Keat, Niskayuna, NY (US);
Yanyan Wu, Houston, TX (US);
Chad Eric Yates, Houston, TX (US);
Xichang Zhang, Houston, TX (US);
Li Zheng, Niskayuna, NY (US);
Pinghai Yang, Niskayuna, NY (US);
Vetco Gray Inc., Houston, TX (US);
Abstract
A wellhead assembly having a tubular magnetized in at least one selected location, and a sensor proximate the magnetized location that monitors a magnetic field from the magnetized location. The magnetic field changes in response to changes in mechanical stress of the magnetized location, so that signals from the sensor represent loads applied to the tubular. Analyzing the signals over time provides fatigue loading data useful for estimating structural integrity of the tubular and its fatigue life. Example tubulars include a low pressure housing, a high pressure housing, conductor pipes respectively coupled with the housings, a string of tubing, a string of casing, housing and tubing connections, housing and tubing seals, tubing hangers, tubing risers, and other underwater structural components that require fatigue monitoring, or can be monitored for fatigue.