Multilayer fuel gas storage well cylinder used for high-pressure underground fuel gas storage well and molding-fixing method thereof
A fixing method and technology of gas storage wells, applied in the direction of transportation and packaging, storage devices, etc.
Inactive Publication Date: 2012-07-18
自贡力源科技有限公司
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Problems solved by technology
[0004] The solution to the multi-layer gas storage well body of the present invention is to aim at the disadvantages existing in the use process of the double-pipe underground natural gas high-pressure gas storage well. It not only tightly wraps the outer surface of the gas storage cylinder, but also tightly connects the inner layer of the gas storage cylinder with the outer cylinder to strengthen the inner layer of the gas storage cylinder to reduce the adverse effects of alternating loads on the gas storage cylinder during use. In addition, since the inner gas storage tank, the cement protection reinforcement layer and the outer cylinder are fastened together, there is no cavity or gap in the middle, not only the surface water is difficult to infiltrate, even if the outer cylinder due to cementing defects During the use of the gas storage cylinder, it is corroded by groundwater and harmful gases, causing perforation, etc. Since the outer surface of the gas storage cylinder has a layer of cement protection and strengthening layer that tightly wraps it, it can still effectively protect the gas storage cylinder from damage and ensure high-pressure gas storage wells service life; in order to ensure that the cement protection reinforcement layer not only tightly wraps the outer surface of the gas storage cylinder, but also tightly connects the inner gas storage cylinder and the outer cylinder body into one effect, the fixing method of the multi-layer gas storage well cylinder body of the present invention is: First, use geological drilling to open a foundation well, then lower the outer cylinder with a grouting hole at the bottom into the foundation well an...
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[0019] This embodiment takes CNG gas filling stations, urban gas peak-shaving stations, and natural gas underground gas storage wells used in storage and distribution stations as an example: the outer cylinder 3-1 has a specification of Φ323.9×6mm, and the gas storage cylinder 3-3 The diameter is Φ244.48mm (9 5 / 8 ″) casing, the effective gas storage part is 100m deep, and the gas storage pressure is 25Mpa. The forming and fixing method of the multi-layer gas storage well casing is as follows:
[0020] Step A. Lower the outer cylinder 3-1: first drill a foundation well 1 with a diameter of Φ400mm and a depth of not less than 105m according to oil and natural gas drilling technology and procedures, and then lift the splint through the outer cylinder according to the fixing method of the conventional underground gas storage well shaft 5 and lifting lug 6 to lower the outer cylinder body 3-1 with the grouting process hole at the bottom into the foundation well. In this embodime...
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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...
Claims
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Inventor 冉训刘国伟陈英辛国斌陆德明杜川李利李睿
Owner 自贡力源科技有限公司
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