Material or article handling – Well pipe or rod racking mechanism – With slope change
Patent
1984-01-26
1987-03-24
Werner, Frank E.
Material or article handling
Well pipe or rod racking mechanism
With slope change
175 85, 294 88, 294902, 901 39, 414732, 414744A, 414751, 414735, 414739, E21B 1914
Patent
active
046521950
ABSTRACT:
A casing stabbing apparatus which includes a derrick bracket subassembly for attachment to a brace of 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.
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patent: 3840128 (1974-10-01), Swoboda, Jr. et al.
patent: 3921823 (1975-11-01), Bourree et al.
patent: 4013178 (1977-03-01), Brown et al.
patent: 4077525 (1978-03-01), Callegari et al.
patent: 4274778 (1981-06-01), Putnam et al.
Laney William R.
Werner Frank E.
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