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Rig Designs - Tarzan Class

Supplier: Letourneau Technologies Brisbane

Designed for year-round operation in tropical storm regions with water depths up to 300 feet, LeTourneau's TARZAN CLASS self-elevating mobile drilling units represent LeTourneau's dedication to building cost-efficient, long life cycle jack-up rigs.

Price Guide: POA

Design Criteria

  • Classified by the American Bureau of Shipping A1
  • Built in accordance with the 1989 MODU Code
  • Established by the IMO Resolution A 649 (16)
  • Service temperature -10°C (14°F)


  • Bow-mounted octagon configuration 73 feet, flat to flat
  • Designed to CAP 437 regulations for S61N or S92 helicopters


  • Four-level quarters with accommodations for up to 100 persons
  • Includes medical treatment room, offices, conference room, galley, dining and recreation facilities
  • Year-round climate control
  • Top-mounted control house with internal and external access

Anchor Winches

  • Features two optional LeTourneau W-1500TS (2-speed), each with a 50,000-pound line pull
  • Features dynamic electric braking, no clutch or transmission, and provides low-maintenance operation


  • Includes three PCM-220SS LeTourneau high-performance, solid-state pedesta king post cranes
  • 140-foot boom length, rated at 150,000 pounds at 145-foot reach

Jacking System

  • Nine LeTourneau 440-Kip electro-mechanical rack and pinion drives (dual 3-high)
  • Each leg jacks independently at 1.5 feet per minute with a total normal elevating capacity of 21,600 kips and preload jacking of 28,350 kips
  • Monitoring and control from touch screen displays

Substructure, Subbase and Cantilever Beam

  • Designed and equipped for cantilever drilling mode utilising the LeTourneau rack and pinion electro-mechanical skidding system
  • 50-foot (60-foot optional) fore and aft movement of the cantilever and +/- 15-foot transverse movement of the substructure permit multiple drilling positions facilitating workover, production, and exploration drilling

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