Mobile land drilling rig and method of installation

Details Mobile land drilling rig and method of installation Mobile land drilling rig and method of installation

2008-09-16

2010-10-26

Bagnell, David J (Department: 3676)

Boring or penetrating the earth

With magazine for successively moving unconnected, oriented...

C175S085000

Reexamination Certificate

active

07819207

ABSTRACT:
A mobile oil, gas and geothermal well drilling rig 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 drawworks trailer transports both 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 while the weight of the derrick is off-loaded from the drawworks trailer to the base support structure.

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National Oilwell Varco webpages 1-4; “Rapid Rig”; www.nov.com; copyright 2006.

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