Implements or apparatus for applying pushing or pulling force – Device or member for contacting and guiding moving cable – Including rotatable – cable contacting – pulley wheel element
Patent
1975-05-27
1976-10-19
Taylor, Dennis L.
Implements or apparatus for applying pushing or pulling force
Device or member for contacting and guiding moving cable
Including rotatable, cable contacting, pulley wheel element
254105, 61 92, E02B 1704
Patent
active
039863689
ABSTRACT:
A load equalizing system for a jack-up leg on a mobile off-shore drilling platform barge, wherein the leg has a plurality of rigidly interconnected generally parallel chords. Each of the chords is connected to the barge by a rack and pinion type jack assembly arranged for raising and lowering the leg relative to the platform and wherein lateral deflection of the leg by wave action or the like causes the chords to move vertically unequally relative to the barge. The improvement comprises a pair of hydraulic cylinder assemblies mounted between each of the jack assemblies and the barge, with the working axes thereof generally parallel with the longitudinal axis of the leg. Each cylinder assembly has a cylinder piston mounted therein and a piston rod connected to the piston and extending longitudinally therefrom. Each of the hydraulic cylinder assemblies has one end connected to the barge and the other end arranged for vertical bearing against the top of one of the jack assemblies. Conduit means are provided for interconnecting the fluid containing ends of the cylinders for permitting hydraulic fluid to be transmitted therebetween. Means are also provided for charging hydraulic cylinders with at least sufficient hydraulic fluid to maintain the piston rods at about mid-stroke, whereby unequal vertical loads on the chords are reduced by equalization of hydraulic pressure in the cylinders through the conduit means. In the shock absorbing mode, the system includes a plurality of accumulators, each of which is arranged for containing a quantity of gas. Second conduit means are arranged for interconnecting the cylinders with the accumulators. Means are also provided for pressurizing the accumulators with gas whereby shock force exerted on the leg, as would be caused by heaving of the barge during raising and lowering of the leg, are absorbed by displacement of hydraulic fluid from the cylinder to the accumulators and compression of the gas therein.
REFERENCES:
patent: 2992812 (1961-07-01), Rasmussen et al.
patent: 3245658 (1966-04-01), Sutton
patent: 3392534 (1968-07-01), Blenkarn
Levingston Shipbuilding Company
Taylor Dennis L.
LandOfFree
Load equalizing and shock absorber system for off-shore drilling does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Load equalizing and shock absorber system for off-shore drilling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Load equalizing and shock absorber system for off-shore drilling will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-95873