METHOD OF TREATMENT OF INTERNAL SURFACES OF PIPELINES WITH CHEMICAL REAGENTS AND A DEVICE FOR ITS REALIZATION Russian patent published in 2004 - IPC

FIELD: petroleum and gas and other industries.

SUBSTANCE: the invention pertinent to the field of treatment of internal surfaces pipelines with chemical agents: technological pipelines, water-air ducts and also main oil-and-gas-products pipelines. The method is realized by a compressed gas pushing the liquid chemical reagents through a pipeline cavity between two delimiters of the volume underpinned from the front side by the pressure of the medium being expelled from the pipeline, and by separation of compressed gas from the liquid chemical reagent in the upper part of the pipeline cavity restricted by the delimiters, that penetrates through the non-compact contacts of the delimiter with the pipeline and its outburst into the cavity of the pipeline together with the expelled medium, and also by introduction of the chemical reagent level in the forced oscillations in the gas bubble. The device for the method of realization includes two delimiters, that are limiting the pipeline cavity with a volume of the chemical reagent, and two installed in the restricted cavity gas separators with possibility of their displacement on a circle around the axis of the pipeline. The gas separators are installed on the both ends of the restricted cavity and have a positive floatation, due to that they are always in the upper part of the restricted cavity of the pipeline. The gas separators are incorporated in the over-all system of discharge of the separated from the chemical agent gas through a check valve into the cavity of the pipeline together with the being expelled medium. The design of the gas separators in the process of the gas separation ensures excitation of the forced oscillations of the level of the chemical agent in the gas bubble. Application of the invention allows perform an efficient, qualitative and cost-saving treatment of the internal surface of the oil and gas pipelines.

EFFECT: the invention ensures an efficient, qualitative and cost-saving treatment of the internal surfaces of the oil and gas pipelines.

3 cl, 8 dwg