| 摘要 |
An improved oil well production tube system characterized by a series of seam-welded, coilable tubes configured for placement in a subterranean fluid recovery well. Smaller coilable tubes, contained within a larger coilable tube, are configured for providing power communication between the surface and a downhole recovery means. The larger coilable tube is configured for providing communication of a recovered fluid from downhole to the surface. During fabrication, one or more smaller coilable tubes is introduced along the surface of a length of flat strip metal. The smaller coilable tubes are preferably tack-welded to the surface of the flat strip metal at determined intervals along their length. The length of flat strip metal is formed into tubular form and seam welded to form a coilable tube containing the smaller tubes therein.
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