BHL BRAND NEW AMERICAN BLOCK 1500AC DRAWWORKS
One (1) A.C. Gear Drive Drawworks (based on 2nd layer)
• Maximum Hoisting Capacity (10 Lines) 758,000 LBS
• Maximum Hoisting Capacity (8 lines) 632,000 lbs.
• Maximum Hoisting Capacity (6 Lines) 495,000 lbs
• Max Single Line Pull 93,727
• Drum Diameter 28.875″
• Drum Length 60″
Gear Box & Lubrication
• Single Speed Gear Box:
o Steel Fabrication, Normalized before machining.
o Gear Quality: AGMA Rating of 11Q or higher
o An immersion heater is provided to maintain the oil temperature at a minimum of 100 °F
• Lubrication System:
o Electrically driven Hydraulic pump -5 HP motor, 460V (575V option)
o Filtration System with visual clog indicator -5um
o Immersion heater -460V (575V option)
Breaking (Parking Fail Safe Calipers and Air Cooled Discs)
• Eaton, springs set brake, pneumatic release Eaton 338 DDBS
• Operating Pressure: 90-120 PSI
• Guards provided around the brake to limit contamination of discs.
Pneumatic Control Panel for Air Brake
• Pilot controlled relay valve used to regulate operating pressure required to release brakes.
• Quick Exhaust valve utilized to ensure quick & fail-safe engagement of brakes.
• 15 gal air receiver tank provided along with necessary plumbing and valves.
• Provision to release the brake manually in case of power loss.
Drilling Motor (Alc) (1 per Drawworks) GEB-28 or equivalent
• Continuous Rating: 1500 HP (8,750 FT-LB)
• Drawworks Rating: 1828 HP (12,000 FT-LB)
• Blower: 20 HP, 480 VAC, 60 Hz, 40°C
Dynamic Breaking with A.C. Motors
• Achieved with dynamic breaking resistors powered through AC Drive System (Drive system and resistors not quoted)