Independent safe long-acting double-pipe water injection pipe column
An independent and safe technology, applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., it can solve the problems of insufficient diversion of inner and outer pipes, unreliable safety control, and large force on the outer pipe, so as to reduce operation cost, increase service life, and save construction cost
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[0021] The detailed description and technical content of the present invention are described below with the accompanying drawings, but the accompanying drawings are only provided for reference and description, and are not intended to limit the present invention.
[0022] according to figure 1 , an independent safe long-term double-pipe water injection string, including an independently arranged inner pipe 12 and an independently arranged outer pipe 11. The inner water injection channel, the annular space formed between the inner pipe and the outer pipe is used as the outer water injection channel connected to the upper oil layer, and the upper ends of the inner and outer pipes are equipped with safety control devices, including inner pipe safety valve 8, annular safety valve 6 and annulus safety packer 10, which respectively control the three axial passages of the inner pipe, the inner and outer pipe annulus, and the outer pipe and casing annulus, so as to realize the complete...
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