drilling rig,DC drilling Rigs,drilling machinery Model:ZJ50D, ZJ70D Nominal drilling depth, m:5000,7000. 1)DC Rig adopts ... controls into video communication, the driller can perform all drilling parameter setting in the air conditioned room , the working ... Satisfy the requirement for TDS installation....... Parameter. Rig ModelZJ50DZJ70DNominal drilling depth, 127mm(5)DP,m50007000Max. hook load, kN(t ...