| 摘要 |
A highly mobile and capable oil, gas and geothermal well drilling rig is shown which provides for the rapid placement, assembly, disassembly, and repositioning of various rig components of the drilling rig The drilling rig includes a support base and working floor which is trailerable and which can be rapidly erected to a working height at the well site. A special drawworks trailer both transports the drawworks and the rig derrick. Hydraulic cylinders on the drawworks trailer are used to move the derrick from a horizontal, transport position to a vertical, working position. At the same time, the weight of the derrick is off-loaded from the drawworks trailer to the base support structure. The selection and arrangement of the various rig components provides a faster set up and take down operation than was previously obtained.
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