Transneft, the Pipeline Transport Institute and Transneft Upper Volga became holders of the Russian Federation patent No. 192203 for the utility model “Sealing device with installation and removal through air escape valves, for blocking pipelines' internal cavity".
The sealing device is designed to temporarily block the internal cavity of pipelines from oil or petroleum products vapor during repair and restoration work on pipelines.
Application of this sealing device secures increased safety of emergency recovery works due to closing off a pipeline’s internal cavity with two sealing units, which are put in and removed from a pipeline by special devices through air escape valves (nozzles, tees or fittings). It also lets control pressure and vacuum level in the section between the sealing elements, increasing the level of work safety.
The uniqueness of the development is that the sealing elements are resistant to oil and petroleum products, including jet fuel, which allows to maintain the quality of the transported petroleum product and eliminates the cost of its restoration after repairs that require loss of containment of a pipeline. Application of the development will ensure uninterrupted operation of the mechanical-process equipment of oil pumping stations thanks to the lack of the necessity to transport sealing elements through the pipeline.