MAST AND SUBSTRUCTURES

MAST AND SUBSTRUCTURES

Maximum static working hood load: from 275 kN ( 30 short tons, 28 tf ) to 2200 kN ( 248 short tons, 225 tf )
Free height of the mast from the ground to under the crownblock beam: from 17.4 m ( 57.23 ft ) to 39 m ( 127.95 ft )
Mast lifting ( up/down ): hydraulic ( with one or two hydraulic cylinders )
Mast folding/telescoping: hydraulic ( with one cylinder ) for two sections masts
Mast anchoring: mast - chassis resistance anchor set ( semi-trailer ), mast - ground safety anchor set, „monkey board” - mast anchor set and „monkey board - ground anchor set
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Work platform height
4800 mm
15,74 ft
Height under the rotary table beams
3960 mm
13 ft
Maximum static load on the rotary table beams
785 kN
88 short tones
Maximum load on rod cushions
2 x 392 kN
44 short tones
Height under derrick floor
4800 mm
15,74 ft
Rotary table type
Derrick floor dimensions
6835 x 5460 mm
22.4 x 17.9 ft
Simultaneous total load
1570 kN
176 short tones

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Work platform height
5000 mm
16,4 ft
Height under the rotary table beams
4100 mm
13,45 ft
Maximum static load on the rotary table beams
1250 kN
140 short tones
Maximum load on rod cushions
2 x 450 kN
2 x 50 short tones
Rotary table type
Derrick floor dimensions
6900 x 6140 mm
22.63 x 20,14 ft
Simultaneous total load
2150 ( 1250 + 2 x 450 ) kN
241 short tones

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Work platform height
5660 mm
18,56 ft
Height under the rotary table beams
4700 mm
15,41 ft
Maximum static load on the rotary table beams
1600 kN
180 short tones
Maximum load on rod cushions
2 x 600 kN
67 short tones
Rotary table type
Derrick floor dimensions
6900 x 6106 mm
22.63 x 20 ft
Simultaneous total load
2800 ( 1600 + 2 x 600 ) kN
314 short tones

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Work platform height
6100 mm
20,01 ft
Height under the rotary table beams
5140 mm
16,86 ft
Maximum static load on the rotary table beams
1770 kN
199 short tones
Maximum load on rod cushions
2 x 785 kN
2 x 88 short tones
Rotary table type
Derrick floor dimensions
8060 x 6420 mm
26.44 x 21,06 ft
Simultaneous total load
3528 kN
396 short tones

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The mast, equipped with a crownblock, constitutes together with the travelling block and the drawworks, the load handling system, supporting the load during the work and allowing through its construction the lowering and raising of the drill string or tubing column.
It is a welded metal construction, profiled transversely in a “U” shape, made of pipe ( square, rectangular, round ) or open profiles. It can be double ( with two sections ) or single ( with one section ) depending on its length. Putting the mast up and down, as well as its telescoping is done hydraulically.
The mast is anchored with a set of resistant anchors to the chassis of the rig and with a set of external ground safety anchors. It is transported in a horizontal position above the cabin of the chassis and the rig equipment, having a support in the front, while in the back relying on its fixed section.
Folding parallelogram type substructures are complex metal constructions consisting of welded subassemblies, easy to assemble / disassemble, assembled by fork-tongue-bolt system joints, equipped with substructure folding device, access stairs and panels, which ensures the movement of service personnel between the derrick floor, the ground, and the rod ramp, in conditions of work safety.

The substructure is intended for:

  • Supporting the rotary table and taking over its loads;
  • Taking over the loads of the drill rods;
  • It constitutes the working platform around the rotary table, ensuring the circulation of the service personnel, the location of the command, control, and handling devices, as well as the storage of the drilling toolslelor și uneltelor de foraj;
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