Hydraulic well derrick with cable lifts

Details Hydraulic well derrick with cable lifts Hydraulic well derrick with cable lifts

1979-09-28

1982-07-27

Jillions, John M.

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

With rotatable, cable contacting, pulley wheel element...

254 29R, 254399, B66D 308

Patent

active

043413730

ABSTRACT:
As part of a well derrick system using pair of elongated hydraulic cylinders mounted on the derrick face for well pipe elevating, in which an equalizer beam bridges the cylinder ram heads to maintain equality of advance of the rams, the beam being pivoted on a horizontal pivot above the ram heads, the beam carries a lower centrally aligned horizontal pivot sheave means from which cable means extend downwardly to suspend a travelling beam from which depend any of various pipe manipulating tools. In some species additional sheave means on the travelling beam and on an intermediate fixed beam provide for multiple wrappings of the cable means whereby force or distance multiplication may be obtained.

REFERENCES:
patent: 2415014 (1947-01-01), Luebbers
patent: 2438277 (1948-03-01), Fife et al.
patent: 3474924 (1969-10-01), Wheeler
patent: 3877680 (1975-04-01), Childs et al.

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