| 摘要 |
<p>A rotary slip for supporting a drill string having a plurality of slip segments connected to define an opening for insertion of the drill string (14), wherein each slip segment (32, 34, 36) comprises a head region (24), a toe region (26), and an inner radial surface (50) axially extending between the head and toe regions, and wherein the inner radial surface of each slip comprises a circumferential groove (70). A plurality of axially aligned drill string gripping inserts (60) are attached to each slip segment between the head region and the circumferential groove, wherein each insert comprises a gripping surface for contacting the drill string. A load ring (90) is disposed within the circumferential groove of each slip element, the load ring comprising at least one securing element (96) which is engaged by one of the plurality of axially aligned inserts.</p> |
