Non-destructive test evaluation of welded claddings on rods of hydraulic cylinders used for saltwater, brackish and freshwater applications
US8166821B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2009 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Aug 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2634
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of maintaining a rod of a hydraulic cylinder for a motion compensation system of an offshore platform includes non-destructive testing of a metallic cladding deposited onto the rod. An inspection crawler includes a visual inspection device, an eddy current inspection device and an ultrasonic inspection device. The method includes rotating the visual inspection device, the eddy current inspection device and the ultrasonic inspection device around a circumference of the rod while moving the inspection crawler along a longitudinal axis of the rod to simultaneously collect data related to the metallic cladding from the visual inspection device, the eddy current inspection device and the ultrasonic inspection device. The data is analyzed to detect any discontinuities, i.e., defects, in the metallic cladding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.