• Overview
  • Specifications

Overview

We offer AC gear-driven drawworks concepts for onshore and offshore applications. A wide range of models are available in single-speed or three-speed designs with up to 6000-hp ratings. We offer technically advanced gear-driven, active-heave drawworks systems with up to 11,200-hp ratings that are capable of compensating movements on large floaters and drillships.

LDW Series

LEWCO LDW AC gear-driven drawworks offer technically advanced features to increase drilling performance, safety and reliability. The combination of both cost and operational efficiency with small footprints, less weight and reduced noise and vibration further adds to the advantages provided by these solid machines.

UltraHoist Series

UltraHoist offshore drawworks delivers efficient hoisting and lowering during drilling, tripping and handling operations. All UltraHoist drawworks are AC and gear-driven. The three-speed version offers operational flexibility, both at high speeds and high loads. Cameron's UltraHoist drawworks is also simpler to use, and integrates many safety features that are not currently offered by other models. 

UltraHoist AHC Series

UltraHoist active heave compensated (AHC) drawworks delivers safe and efficient hoisting and lowering during traditional drilling, tripping and handling operations, as well as accurate heave compensation during drilling or landing of the BOP to the seafloor. All UltraHoist AHC drawworks are gear-driven and available in three-speed or single-speed versions with power input from 4.500 hp to 9.000 hp and a load handling capacity of up to 1.250 short tons.

Specifications

LDW Series

  • Offered in 500/550K, 750K, 1000K, 1500K and 2000K hook load models
  • Feature an engineered braking system for increased safety
  • Achieve higher operational speeds (in all models) through the use of variable frequency drive (VFD) AC motors
  • Require fewer utilities for installation and fewer spare parts

UltraHoist™ Series

  • Three-speed transmissions used between AC motors and fixed speed gearbox provide unique, fast line speed and pull characteristics
  • Lebus grooved drum for 1-1/2” (or 1-5/8”) drill line – complete with kickback rollers and easily removable guards
  • Easily removable cable anchor
  • Control system interfaces with the Zone Management System via the C-NET network to enable communication with other system PLC, such as the anti-collision system
  • Custom PLC software ensures smooth and natural operation for the driller
  • Built-in, self-diagnostic functions with automatic warning system for service and overhaul of main components
  • Onboard HPU systems for brakes and lubrications fitted with dual pumps and motors
  • Remote-operated fast shift mechanism in the gearbox to avoid gear-shift problems and load-dropping
  • Internal gearboxes use a keyless design avoid stress configurations
  • Fail-safe braking system comprised of two brake discs, one at each side of the drum, and a single caliper with brake pads acting on each disc
  • Combined braking capacity of the emergency and park brakes equal to 200% of maximum line pull
  • Automatic brake monitoring system, including brake slip detection, drum creep detection and drum response detection
  • Two separately fused emergency shutdown circuits
  • Integrated crown and floor saver provides full control of the various braking systems

UltraHoist AHC Series

  • Lebus grooved drum for 2” drill line – complete with kickback rollers and easily removable guards
  • Easily removable cable anchor
  • Control system interfaces with the Zone Management System via the C-NET network to enable communication with other system PLC, such as the anti-collision system
  • Custom PLC software ensures smooth and natural operations for the driller
  • Built-in, self-diagnostic functions automatically warn for service and overhaul of main components
  • Onboard HPU systems for brakes and lubrications fitted with dual pumps and motors
  • Internal gearboxes use a keyless design to avoid stress configurations
  • Fail-safe braking system comprised of two brake discs, one at each side of the drum, and two calipers with brake pads acting on each disc
  • Braking capacity of the emergency brakes equal to 200% of maximum line pull
  • Automatic brake monitoring system, including brake slip detection, drum creep detection and drum response detection
  • Two separately fused emergency shutdown circuits
  • Integrated crown and floor saver provides full control of the various braking systems