YQZ trailer-type drilling rig is suitable for: *Drilling of drinking water wells in urban and rural areas *Agricultural irrigation water drilling *Industrial and other water well drilling holes *Engineering constructi.
[pdf] In DTH drilling, the percussion mechanism – commonly called the hammer – is located directly above the drill bit. The drill pipes transmit the necessary feed force and rotation to the hammer and the bit, along with the fluid (air, water or drilling mud) used to actuate the hammer and flush the cuttings. The drill pipes are added to the drill string successively behind the hammer as the hole gets deeper.
[pdf] Our company is going international. As a professional manufacturer of drilling equipment, we can supply high quality crawler drilling machine, hydraulic drilling machine. JK Drilling has established a.
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