| 摘要 |
<p>Continuous coil tubing (100) made from shorter lengths of flat metal strip (26) which are spliced end-to end and formed into tubular form (104) and seam welded and thereafter introduced into a forging or hot reduction process (106) . Finished coil tubing is withdrawn from the process at a faster rate than flat metal strip is fed into the process. Welds made to the flat metal strip blend into and substantially disappear from the finished coil tubing.</p> |
