Material or article handling – Well pipe or rod racking mechanism – With slope change
Patent
1986-11-03
1988-02-16
Paperner, Leslie J.
Material or article handling
Well pipe or rod racking mechanism
With slope change
175 52, 211 704, E21B 1914
Patent
active
047251794
ABSTRACT:
Apparatus for use to facilitate threading and unthreading substantially vertical lengths of pipe on a drilling rig by moving the pipe between the well bore center line and a racking assembly. An arm having a gripping head mounted thereon is extendable and retractable relative to a carriage mounted on the drilling rig working board. When storing pipe, the lower end of each pipe is set on a support assembly which includes a plurality of switches which signal the position of each pipe thereon. The arm and carriage are moved under control of a computer to an appropriate slot for storing the upper end of the pipe stand. When running pipe into the well bore, the arm and carriage move the upper end of the pipe to the center line of the well and when the traveling block of the drilling rig picks up the pipe, a signal generated by the switch beneath the pipe causes the carriage and arm to move to the location for unracking the next stand of pipe.
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Brittain John C.
Jenkins Cecil
Woolslayer Joseph R.
Lee C. Moore Corporation
McCollom Alan T.
Paperner Leslie J.
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