| 摘要 |
<p>A tubing connector non-releasably connected to a tube of tubing string for use downhole in oil and gas well operations, the connector comprising connector body (1) with an end portion fitted concentrically within or over a corresponding end of the tube (2), the end portion having a plurality of depressions (12) coinciding with corresponding depressions (10) on the corresponding end of the tube (2) whereby the connector body (1) and tube (2) are connected together, the depressions (10) and the tube (2) having been formed by localised plastic deformation of the walls of the tube (2).</p> |
