Tool and method for cleaning insoluble matter at the cavity bottom of salt cavern gas storage

Abstract

The invention discloses a tool for cleaning insoluble matter at the bottom of a salt cavern gas storage chamber and a cleaning method thereof, which relates to the technical field of oil and gas development, comprising: an oil pipe; a rotary jet flushing tool connected to the lower end of the oil pipe; the rotary jet flushing The tool can be rotated to spray the high-pressure cleaning fluid used to break the insoluble matter and stir the insoluble matter at the bottom of the cavity in the circumferential direction and downward; the first pipe body and the second pipe body arranged beside the oil pipe; the adjustment mechanism, the The adjustment mechanism is installed on the oil pipe or on the first pipe body and the second pipe body, and the adjustment mechanism can make the lower ends of the first pipe body and the second pipe body move in the radial direction. The application can adjust the distance between the pipe body and the oil pipe according to actual working conditions, significantly improve the flowback efficiency of insoluble matter, reduce cleaning construction costs, and increase the effective storage volume of the salt cavern gas storage.

Description

technical field [0001] The invention relates to the technical field of oil and gas development, in particular to a tool for cleaning insoluble matter at the bottom of a salt cavern gas storage chamber and a cleaning method thereof. Background technique [0002] Salt cavern gas storage has the advantages of high injection and recovery rate, large short-term throughput, low cushion gas volume and can be fully recovered, which makes it play a very important role in energy storage and peak shaving emergency, and has now become a natural gas storage facility. It has important practical and strategic significance for my country's energy development. [0003] my country is rich in salt layer resources, and the total thickness of the salt layer can reach thousands of meters, but it has the characteristics of layered distribution, many argillaceous interlayers, and high content of insoluble impurities. After the dissolution of the cavity, there will be thick accumulation of insoluble...

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Problems solved by technology

In order to effectively improve the gas storage capacity of the salt cavern gas storage, various experts and scholars have conducted extensive research on how to remove the insoluble matter at the bottom of the cavity and proposed some more effective methods. However, due to the impact of the rotating jet and the centrifugal effect of the rotating flow field, the broken insolubles tend to gather far away from the nozzle, so that the concentration of insolubles near the cleaning column is significantly reduced, so it is urgent to invent a new cleaning method Improving the Cleaning Efficiency of High-Pressure Rotating Jet on the Insoluble Matter in Cavern Bottom of Cavern Gas Storage

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