| 摘要 |
A power swivel stand for horizontally and vertically positioning a power swivel with respect to a well being serviced. A frame is mounted on a base, preferably by pinned connections. A carriage is mounted in the frame and is vertically positioned by one or more hydraulic cylinders. Attached to the carriage are one or more positioning arms, in such a manner that the positioning arms can be pivoted in a vertical plane. The positioning arms can be pivoted by extension and retraction of hydraulic cylinders connecting the carriage and the positioning arms. A power swivel is held by the positioning arms. Pivoting the positioning arms moves the power swivel horizontally into and out of alignment with the well being serviced.
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