The standard method involves percussion drilling in which a drill is alternatively raised and dropped in the descending borehole. It is suited to the drilling of wells in any material from soft clay to the hardest rock.
[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 m.
[pdf] This model is a full-hydraulic gyrator-type anchoring engineering drilling rig, which is mainly suitable for engineering construction such as foundation pit support and control of building displacement, geological disaster management in urban areas.
[pdf] 
