| 摘要 |
A threaded connection (10) having a straight central axis (26), the connection (10) including a plurality of pin threads (20), each pin thread (20) having a root (42) and a crest (40), and a box (16) having a plurality of box threads (22), each box thread (22) having a root (50) and a crest (48). The crests (48) of at least a portion of the box threads (22) are curved so that when the pin threads (20) are fully engaged with the box threads (22), there is a void (104) between the roots (42) of the pin threads (20) and the corresponding curved crests (48) of the box threads (22) to reduce standoff caused by lubricant or other fluids becoming trapped between the threads as the connection (10) is made up. |
