... Drilling Rig 1. ZJ30~ZJ90 RIG 2. Electrical driven drilling rig 3. Mechanical driven drilling rig 4. SCR DC driving sys Drilling RigWe can offer drilling ... ZJ50JD, ZJ50D and etc. ZJ50L and ZJ50LD drilling rig have exported to oversea, and obtained reputation of ... efficiency, and distribute load automatically.Drilling Rig ModelZJ50/3150JDZJ50/3150LZJ50/3150DNominal drilling depth, m5in, 5in DP3000-45004 ...