Equipped with hydraulic drive combined rotary valve, hydraulic pressure regulating valve to control the annular pressure, free of compressed air, suitable for high latitude, polar.
Equipped with hydraulic drive combined rotary valve, hydraulic pressure regulating valve to control the annular pressure, free of compressed air, suitable for high latitude, polar.
Equipped with hydraulic drive combined rotary valve, hydraulic pressure regulating valve to control the annular pressure, free of compressed air, suitable for high latitude, polar.
Drilling Equipment
Drilling Equipment
Drilling Equipment
Drilling Equipment
Drilling Equipment
Drilling Equipment
Drilling Equipment
Drilling Equipment