Material or article handling – Well pipe or rod racking mechanism
Patent
1990-05-01
1991-11-05
Werner, Frank E.
Material or article handling
Well pipe or rod racking mechanism
4147448, 4147452, 414735, 414751, 414730, 901 39, 294902, 294 88, B65G 4708
Patent
active
050627562
ABSTRACT:
A casing stabbing apparatus which includes a derrick bracket subassembly for attachment to a derrick, and a boom having an end pivotally connected to the bracket assembly for pivotation about a vertical axis and about a horizontal axis. A pair of arcuate casing gripping jaws is pivotally connected to the second end of the boom. A piston and cylinder assembly extends between the jaws to selectively converge and diverge the jaws. A second piston and cylinder assembly extends between the bracket assembly and the boom to elevate the boom by pivotation about a horizontal pivotal axis. A third piston and cylinder assembly extends between the bracket assembly and the boom to swing the boom laterally in pivotation about a vertical axis. A remote automatic control subassembly enables the casing stabbing operation to be carried out from a remote location by the use of a hand held wand, and it includes remote control feedback circuitry which aids the operating in quickly and precisely positioning the boom for engaging the casing and moving it into a position of alignment.
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Harrel John
Mayberry John
McArthur James R.
Harrel Charlena
Harrel John
Werner Frank E.
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