A Novel Method to Enhance Pipeline Trajectory Determination Using Pipeline JunctionsReport as inadecuate




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MMSS Research Group, Geomatics Engineering Department, University of Calgary, 2500 University Dr. NW. Calgary, AB T2N 1N4, Canada





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Academic Editor: Gert F. Trommer

Abstract Pipeline inspection gauges pigs have been used for many years to perform various maintenance operations in oil and gas pipelines. Different pipeline parameters can be inspected during the pig journey. Although pigs use many sensors to detect the required pipeline parameters, matching these data with the corresponding pipeline location is considered a very important parameter. High-end, tactical-grade inertial measurement units IMUs are used in pigging applications to locate the detected problems of pipeline using other sensors, and to reconstruct the trajectories of the pig. These IMUs are accurate; however, their high cost and large sizes limit their use in small diameter pipelines 8″ or less. This paper describes a new methodology for the use of MEMS-based IMUs using an extended Kalman filter EKF and the pipeline junctions to increase the position parameters’ accuracy and to reduce the total RMS errors even during the unavailability of above ground markers AGMs. The results of this new proposed method using a micro-electro-mechanical systems MEMS-based IMU revealed that the position RMS errors were reduced by approximately 85% compared to the standard EKF solution. Therefore, this approach will enable the mapping of small diameter pipelines, which was not possible before. View Full-Text

Keywords: pipeline junctions; Kalman Filter; inertial measurement unit; PLJ; INS; PIG pipeline junctions; Kalman Filter; inertial measurement unit; PLJ; INS; PIG





Author: Hussein Sahli * and Naser El-Sheimy

Source: http://mdpi.com/



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