ТЕХНОЛОГІЇ ВНУТРІШНЬОТРУБНОГО ОБСТЕЖЕННЯ ТА РЕМОНТУ ВАЖКОДОСТУПНИХ ДІЛЯНОК ГАЗОНАФТОПРОВОДІВ

Abstract

Expediency of in-tube tools for inspection and repair of oil and gas pipelines’ hard-to-reach areas laid under water at great depths in a remote swampy, mountainous terrain, built by means of directional drilling was defined.
The analysis of the defects during pipelines’ construction and operation was performed. The defect types in oil and gas pipelines’ hard-to-reach areas were determined. The trends of the in-tube inspection and repair of oil and gas pipelines’ hard-to-reach areas were listed. The analysis of the technical feasibility of in-tube inspection (intelligent pig, crawler) was performed; their advantages and disadvantages were outlined. The analysis and classification of existing methods of the in-tube repair, including packers, liners (C, U - liners, primus liners, liners stockings) were performed, welding (robotic devices, manual arc elding), metal inserts (tube-in-tube, in-tube sleeve), the features, advantages and disadvantages were defined, the onclusions about the suitability of a method for the repair of different defect spots of oil and gas pipelines were made. The development priorities of in-tube repair of oil and gas pipelines’ hard-to-reach areas were outlined. It was found that the most versatile and cost-effective method of repair are by means of in-tube robots – the current world trend in pipelines repair.

The structural parts consist of in-tube robots were presented and the types of in-chassis robots, their
advantages and disadvantages, promising for solving main oil and gas pipelines’ hard-to-reach areas of different
diameters were highlighted