| 摘要 |
In a wellhead near the top of an oil and gas well, a locking profile configured for locking engagement with an inner well member and including a locking ridge having a rib and a locking shoulder. The locking ridge extends radially inward from an inner surface of the wellhead into a well bore. The rib is located on an end of the ridge distal from the wellhead and protrudes into the inner well member. The locking shoulder is located on an end of the ridge distal from the wellhead and adjacent a lower end of the rib, so that as the inner well member exerts an upward force on the rib, the upward force creates a moment in the locking ridge that pushes the locking shoulder into tighter engagement with the inner well member. |
