| 摘要 |
A machine for laying down or picking up pipe sections, casing sections and the like during a well drilling operation and includes a draw works associated with a catwalk alongside of a pipe rack and oriented in normal relationship to a drill rig with cable arrangements extending from the draw works to a sheave supporting post assembly anchored in the rathole pipe in the drill rig floor. Carriages are mounted on the cable assembly for picking up a pipe section or laying down a pipe section in relation to the catwalk and conveying the pipe section to and from a position adjacent the sheave supporting post assembly in the rathole pipe thereby enabling the pipe section to be picked up by the structure in the drill rig in order to assemble the pipe section with sections already in the drill rig and to facilitate removal of the pipe sections when breaking down or disassembling a pipe string.
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