Rapid data-based data adequacy procedure for pipeline integrity assessment
US9182081B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 30, 2008 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | May 21, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17D5/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method and system for evaluating the sample coverage of ultrasonic or radiography (UT/RT) measurements of pipeline wall thickness for statistical validity. A data library contains distributions of in-line inspection (ILI) measurements for other pipelines, calibrated to correspond to UT/RT measurements as needed. The data library for these ILI-measured pipelines also includes statistics generated from Monte Carlo simulation, by way of which various sample coverage levels sample the ILI measurements, for determining whether a measurement exceeds a given threshold or meets another premise related to determining the extreme wall loss measurement for the pipeline. A pipeline with sampled UT/RT measurements is used to identify one or more ILI-measured pipeline datasets that are most similar, and the statistics from those most similar pipeline datasets determine whether the sample coverage of the UT/RT measurements is sufficient to draw conclusions about the extreme value of wall loss in the sampled pipeline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.