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The drilling rig URB-2A2
The drilling rig URB-2A2 is designed for drilling of geophysical and stratigraphic test wells in oil and gas exploration, in exploration of solid commercial minerals and ground water, for engineering and geological research. It is used to drill water wells and blast holes. URB-2A2 is the mobile drilling rig mounted on truck ZIL-131 (ЗИЛ-131) or Ural-4320 (Урал-4320).
Swivel head moved along the mast is used for drilling, installing the drilling tools without taking out of the bottom hole. The swivel head and the hydraulically operated hoist transport up and down the drilling tools during drilling. Swivel head, along the mast, moves by hydraulic cylinder and tubing traveling system.
Monitoring devices and regulators of hoisting speed, rate of downward drilling bit feed and speed of swivel head are located in control desk.
Specification of the drilling rig URB-2A2:
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Drilling depth, m:
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- of stratigraphic test wells with flushing
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300
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- of geophysical wells:
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- fluid circulating drilling
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100
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- air drilling
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30
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- auger drilling
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30
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Starting diameter of fluid circulating drilling, mm
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190
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Finishing diameter of fluid circulating drilling, mm:
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- of stratigraphic test wells with flushing
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93
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- of geophysical wells:
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118
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Diameter of air drilling, mm
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118
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Diameter of auger drilling, mm
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135
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Speed of tool string, s-1
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2,33; 3,75; 5,42
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Max torque, Nm
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2010
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Stroke of swivel head, mm
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5200
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Hoisting speed of tool string, m/s
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0-1,25
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Overall dimensions in transportation condition, mm
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7850х2500х3300 (8080х2500х3500)
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Overall dimensions in working condition, mm
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7850х2500х3300 (8080х2500х3500)
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Weight if the rig, kg
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< 100 100 (13 800)
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Mud pump NB-50:
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Max displacement of mud pump, m3/s
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0,011
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Max pump discharge pressure, MPa
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6,3
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Compressor K-5A (4VU1-5/9) (4ВУ1-5/9)
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Compressor output, m3/s
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5
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Max compressor outlet pressure excess, MPa
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0,8
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