초록 ▼

Disclosed are apparatus for gripping and manipulating pipe members, including a plurality of slip carriers mounted on an equal number of carrier actuators. The carrier actuators are arranged within a drive sleeve and constrained by radial T-slot connections to a base ring. Sloped T-slot connections

Disclosed are apparatus for gripping and manipulating pipe members, including a plurality of slip carriers mounted on an equal number of carrier actuators. The carrier actuators are arranged within a drive sleeve and constrained by radial T-slot connections to a base ring. Sloped T-slot connections link each of the carrier actuators to the drive sleeve. Longitudinal movement of the drive sleeve in one sense propels the carrier actuators and the slip carriers radially inwardly whereby slips mounted on the slip carriers may grip a pipe member positioned within the drive sleeve; longitudinal movement of the drive sleeve in the opposite sense withdraws the carrier actuators and slip carriers from the pipe member. Cooperating wedging surfaces between each of the slip carriers and the corresponding carrier actuator permits the application of holding or moving force on pipe members in either longitudinal sense. The base ring may be rotated by means of a chain drive mechanism to thereby apply torque to pipe members by way of the slips.

대표청구항 ▼

Apparatus for manipulating tubular members comprising: (a) slip carrier means mounted on carrier actuator means arranged generally about a passage and movable generally radially relative thereto; (b) slip means, for gripping such tubular member, on said slip carrier means whereby movement by said sl

Apparatus for manipulating tubular members comprising: (a) slip carrier means mounted on carrier actuator means arranged generally about a passage and movable generally radially relative thereto; (b) slip means, for gripping such tubular member, on said slip carrier means whereby movement by said slip carrier means generally radially inwardly relative to said passage may effect gripping engagement between said slip means and said tubular member within said passage; (c) first surface means as part of said slip carrier means and second surface means as part of said carrier actuator means for cooperating with said first surface means for wedging said slip carrier means and said slip means against said tubular member so engaged by said slip means when longitudinal force is applied to said tubular member by said slip means; and (d) drive means linked to said carrier actuator means whereby generally longitudinal movement of said drive means propels said carrier actuator means radially relative to said passage.