| 摘要 |
<p>The ends of drill pipe sections are connected together with a connection that mechanically locks the sections against relative rotational movement. The connection includes a pin member (12) on the end of one of the tubular sections that is received within a box member (11) formed at the end of an adjoining pipe section. The two members (11, 12) have a splined structure (17, 18) that meshes to lock the adjoined connections against relative rotary movement. The two sections are held together axially by a threaded lock collar (13) threadedly engaged within the box member (11) of the connection. Threaded engagement of the collar (13) into the box (11) draws a pin shoulder (15) into a tapered metal-to-metal seal (28) within the box to seal the annular area between the mated connection components. A secondary, annular elastomeric seal member (24) may also be disposed in the overlapping pin (12) and box (11) area.</p> |
