Borehole tube mounting unit for lifting unit for lifting of casing consisting of one or more tubular segments with casing mounting which has reception space open downwards

摘要

The locking pin (13) is acted on by a spring in the direction of the interlocked position. Each latching unit (12) has a holding back unit (22) for holding locking pin (13) in the unlatched position. The unit (22) is connected with a release sensor (40), which projects in the reception space (7), and with acting on by a tube segment (10) travelling in the space (7), a movement of the holding back unit (22) from a held back position in to a released position is effected. The locking pin (13), under the effect of the spring loading (16,17), moves in the direction of the interlocked setting. The locking pin (13) is coupled with a drive (26-39), across which it is movable from the interlocked setting in the unlatched setting.