Mobile heavy duty Double Workover Rig 90 tons


  • SISU heavy duty truck with Caterpillar engine, 10x10 drive for extreme off-road capabilities
  • road approval (Germany, Romania) dimensions and weight within the permitted legal limits for special trucks
  • 6 hydraulical supports, mechanically locked
  • 90 tons hook load
  • drawworks with closed-loop cooling and API 7K monogram
  • sand-line drum for 3000 m working depth (higher depths possible)
  • powerful hydraulic by truck engine via Allison transmission 4700 OFS
  • mast with automatic lock in end position (retracted and extended) and API 4F monogram
  • electric safety according to EN 60204
  • automatically uplifting working platform while mast telescoping
  • stairs foldable for transport
  • store capacity for 140 double tubings up to 31/2“
  • turning circle under < 20 m
  • working temperature range -29°C / +45°C (+55°C for special operations)


max. hook load 90 tons
working depth 3,000 m
max. capacity of double tubings 140 x 31/2“
working temperature range -29°C / 45°C
(55°C for special operations)


type of engine Caterpillar C15 Diesel
output 550 HP


machine corresponds machinery directive 2006/42/EC
ex-classification ATEX 94/9/EC II 2/3 IIA T3
mast API 4F monogram
drawworks API 7K monogram


length 18,300 mm
width 2,550 mm
height 4,000 mm
weight depends on axles (5 or 6) and equipment 50t - 60t

Safety controller functions with motor emergency stop according to EN 13849

  • electronic hook load monitoring (max. 90 tons)
  • monitoring of drawworks cooling and lubrication (ATEX)
  • monitoring of mast locking
  • pneumatic crown block saver
  • dead man switch