Load ring for lifting by elevator, of casing having an upset

摘要

A load lifting apparatus comprises a first housing, a second housing and a mechanical obstruction structure(s). The first housing is sized to slide over an upset tubular having a given diameter, wherein the first housing comprises the mechanical obstruction structure(s) that is designed to move radially inward when engaged with the second housing. The compressed internal diameter of the mechanical obstruction structure(s) can contact the upset tubular, wherein the upset tubular can then be supported by the mechanical obstruction structure(s) and the second housing, for safely lifting the upset tubular.

主权项

1. An apparatus usable for lifting an upset tubular, the apparatus comprising:
a ring comprising an interior surface, the interior surface comprising a groove; a band comprising an exterior surface, wherein the band is disposed relative to the ring such that the exterior surface of the band contacts the interior surface of the ring within the groove; and at least one mechanical obstruction structure connected to the band, wherein at least one of the interior surface and the exterior surface comprises a first portion wider than a second portion, and wherein an external force applied to the band moves the exterior surface relative to the interior surface such that contact between the first portion and at least one of the interior surface and the exterior surface compressively urges the at least one mechanical obstruction structure toward the upset tubular.