Multilayer fuel gas storage well cylinder used for high-pressure underground fuel gas storage well and molding-fixing method thereof

Abstract

The invention belongs to a multilayer fuel gas storage well cylinder used for a high-pressure underground fuel gas storage well and a molding-fixing method of the fuel gas storage well cylinder. The fuel gas storage well cylinder comprises an inner-layer fuel gas storage cylinder, a cement protecting-reinforcing layer and an outer cylinder. The molding-fixing method comprises the following steps: drilling a foundation well and lowering the outer cylinder, fixing the outer cylinder, preparing extended slurry used for the protecting-reinforcing layer, and lowering the fuel gas storage cylinder and the multilayer fuel gas storage well cylinder for molding and fixing. In the invention, the cement protecting-reinforcing layer which tightly wraps the outer surface of the fuel gas storage cylinder and fastens the fuel gas storage cylinder and the outer cylinder integrally is additionally arranged on the basis of a traditional double-tube underground fuel gas storage well, so that the multilayer fuel gas storage well cylinder has the advantages that in the using process, the corrosion of the fuel gas storage cylinder caused by the underground water is isolated completely, the well fixing effect is improved effectively, the deformation amplitude of the fuel gas storage cylinder caused by alternating load is reduced greatly, the safety and reliability of the fuel gas storage and the running of the underground fuel gas storage well is ensured, not only the service life of the fuel gas storage well is prolonged, but also the breakage or explosion in the using process of the shaft of the fuel gas storage well can be prevented, and the like.

Description

technical field

[0001] The invention belongs to a multi-layer gas storage well body for an underground gas storage well of high-pressure fuel gas and a method for forming and fixing the well body, in particular to a multi-layer gas storage well body for high-pressure fuel gas containing a gas storage layer, a cement protection strengthening layer and an outer cylinder protection layer. A shaft body for underground gas storage, and a method for forming and fixing the shaft body; adopting the multi-layer gas storage shaft body for underground gas storage wells for high-pressure fuel gas of the present invention to store high-pressure fuel gas can ensure that the outer surface of the gas storage layer is covered by cement and the outer cylinder The body is evenly covered and fastened into one body, so that while enhancing the strength of the gas storage cylinder, it can effectively prevent the gas storage cylinder from being corroded by groundwater and harmful gases, ensuring long...

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