| 摘要 |
Apparatus for picking up and laying down elongated well elements such as pipe, tubing and sucker rods characterized by a rotatably mounted upright means carrying supporting means telescopically extendible and retractable along the longitudinal axis of the upright means, a boom having one end pivotally connected to the supporting means, means for pivoting the boom with respect to the longitudinal axis of the supporting means to raise and lower the other end of the boom and gripper means on the boom for releasably holding an elongated well element generally parallel to the longitudinal axis of the boom.
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