Petroleum pipeline plugging device

Abstract

The invention provides a petroleum pipeline plugging device. The petroleum pipeline plugging device comprises a plugging part which is matched with a to-be-maintained pipeline in shape, wherein the bottom of one side, away from an opening part of the to-be-maintained pipeline, of the plugging part is sealed; flange shaped sealant is further arranged on the side surface of the plugging part; a groove is formed in the side surface of one side, close to the opening part of the to-be-maintained pipeline, of the sealant; and both the plugging part and the sealant are made of a material which can bedissolved into petroleum. The petroleum pipeline plugging device has the beneficial effects of high efficiency and high safety.

Description

Technical field: [0001] The invention relates to an oil pipeline sealing device. Background technique: [0002] At present, pipelines for transporting flammable and explosive substances such as natural gas and oil need to be replaced and repaired after a period of use due to corrosion of the pipelines, and welding and hot work are required during replacement and maintenance. During hot welding operations, if flammable and explosive substances cannot be effectively isolated, major explosion and combustion accidents will occur. In the past, the main ways to seal the pipeline are: (1) The butter sealing method is also called the butter wall: this method is to push a certain amount of butter at both ends of the pipeline that needs to be repaired to form a butter column to play a sealing role. The function of blocking and isolation, the disadvantage is that the operator needs to complete the welding hot work in a short time, otherwise the butter will collapse and fail, the butte...

AI Technical Summary

Problems solved by technology

(2) The rubber ball plugging method is also called pigging ball: this method is to place an inflatable rubber isolation ball at both ends of the pipeline that needs to be repaired, and cooperate with the butter wall to play the role of sealing and isolation, and the operation is completed Finally, the isolation ball needs to be taken out. The disadvantage is that the rubber isolation ball must be able to be taken out. In the process of taking it out, the rubber isolation ball needs to be destroyed. The damaged rubber residue will pollute the pipeline and also cause blockage to the instrument on the pipeline.

(3) Freezing plugging method: This method is to fill the inside of the pipeline that needs to be replaced with water, and use refrigeration equipment to freeze two sections of icicles in the pipeline, so as to play the role of sealing. The disadvantage is that a lot of preparation work is required before operation , It needs to consume a lot of resources. If it takes a long time to freeze in high temperature seasons, and in cold areas, it will take a long time for the icicles to completely melt after the operation is completed, resulting in a waste of resources.

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