300 Ton Under-Roller

300 Ton Under Roller System w/ 28 ft. Reels

The 300 ton Under Roller System is configured to apply drive torque to four independently driven base mounted rollers. The rollers and their corner block support systems are interconnected at the side by a fabricated beam system and at the front and rear by twelve inch pipe spools. Each side beam has a provision for attachment of the Pull-Down System. Both front and rear pipe spools act as entrance guides for product as it is spooled on a reel, and act a conduit for hydraulic lines that cross the unit. Hydraulic cylinders are integral to the system to lift reels from their shipping cradles. The under roller system can be assembled around a reel and utilize the integral lift system to lift the reel, thus eliminating the need for heavy lift cranes.

Additional traction can be generated by the use of the Pull-Down System. This consists of a hydraulic cylinder attached to a sheave. By installing a choker cable onto the reel and into the sheave of the pull-down system, and pinning the pull-down cylinder to the side beam, an additional 300,000 pounds of downward force may be generated. This system also acts as a safety link to ensure that the reel is secure to the under roller during offshore operations.

For additional information concerning this system; contact Mark Kurtz (OMUS 281-356-8790), Dan Krohn (OIE, 281-351-4499), or Curtis Waters (OIE, 281-351-4499).

Design Specification

Overall Performance

• Footprint: 21'-4" by 28'-8"
• Footprint Bearing Area: 84.67 sq. ft.
• Reel Diameter: 28' outside, Max. 30', Min. 22"
• Reel Width: 16'-5" inside, 8" flanges.
• Torque: 44,400 ft.-lb. continuous, 58,000 ft.-lb. intermittent
• Working Pressure: 3000 psi continuous, 5000 psi intermittent
• Roller diameter: 24"
• Roller Speed: 0.25-50 RPM
• Gear reduction: 53:1 reduction, with fail-safe hydraulic brake

System Weights

• Component weight each weight per 2 assembly
• Corner block 6,000 12,000
• Carriage 3,380 6,760
• Roller Weldment 1700 3,400
• Bearings 150 600
• Motor/Brakes/Gears 1200 2400
• Hyd. Cylinders 900 1800
• Center beam 3200 3200
• Adjoining Pipe 1300
• Pull Down Device 2500
• Total per Assembled Half ( note 1) 30,160
• Total Est. complete Underroller Assembly 67,920

* Note 1. Does not include weight of pull down device

Operating Condition / Engineering Loads

The Under Roller System has been designed and manufactured for use both on land and offshore. The following parameters were used for the design:

• Environment: Indoor and Outdoor, 100% humidity, NEMA 4,4X.
• Temperature: 10 – 130 degrees Fahrenheit (ambient tropical)
• Loads: .75G lateral direction, 1.5G vertical direction, 30o vessel roll.
• Maximum Reel Weight: 300 US Tons, equally distributed.
• Pull-Down System
• The Pull-Down System can be pinned to the side beam of the Under Roller to add virtual load to the reel.
• Pull Capacity: 150,000 lbs. per side @ 3000 psi
• Wire Rope: 1.50 dia. 6 x 41 construction, 404.0" ID choke
• Hydraulic Power Unit (HPU) Also see section 5 for additional HPU details
• Working Pressure: 3000 psi
• Electrical: 460v, 3 Phase, with soft start, (2) 100 Hp motors
• General: (2) Swash plate pumps (for drive rollers) (1) positive displacement pump (for cylinders)
• Controls: Pneumatic, on detachable console
• Hoses: 50 Ft. length
• Oil and Reservoir: ISO 32 Hydraulic Oil, 125 Gallon capacity.