Improving the quality of diagnostics of gas-main pipelines by using a device for automated control of the velocity of pig flaw detectors

Numerical simulation of contact force on bi-directional pig in gas pipeline: At the early stage of pigging

“…Problems such as pig getting stuck in pipeline or crashing with pipeline accessories are some of the risks associated with pigging process (Rahe, 2006;Podgorbunskikh, 2008;Podgorbunskikh and Loskutov, 2008;Guibin et al, 2011). As a result, predicting the motion of a pig to estimate its velocity, position and required driving pressure is particularly important before pigging.…”

Experimental study on the probe dynamic behaviour of feeler pigs in detecting internal corrosion in oil and gas pipelines

“…With the long timelines employed, the problem of pipeline ageing is becoming more and more serious, and pipelines aging greatly promotes defects. Among pipeline defects, corrosion is the critical factor affecting the service life of pipelines (Teixeira et al, 2008;Cosham et al, 2007;Podgorbunskikh et al, 2008;Choi et al, 2003). According to statistics by the US National Transportation Safety Board, 59% of pipeline accidents are caused by corrosion.…”

The evaluation of the bouncing model of caliper pig’s detection arm in subsea gas pipelines

“…To avoid accidents, subsea pipeline inline inspection is indispensable as the fundamental practice for oil and gas pipeline. [4][5][6][7] To describe a full picture of the pipeline, it requires to obtain information of internal pipeline geometry such as big deformation, ovality, buckle, wrinkle, girth-weld and thickness transition. Caliper pig, as one of the intelligent inspection pigs, is always dedicated to detect the pipeline internal geometry anomalies.…”