| 摘要 |
<p>The invention, a reinforcement joint for riser columns used in oil extraction, relates to a reinforcement joint (J) preferably used in drill pipe risers and similar systems, composed of three tubes (1, 3 and 11) rigidly interconnected by connectors (4 and 12) that use a thread (5) for attaching said parts, and are provided with an anti-unscrewing device (10) to prevent accidental disconnections.</p> |
