Drilling Rigs 1. ZJ30~ZJ90 RIG 2. Electrical driven drilling ... SCR DC driving sys Drilling RigsWe can offer drilling rigs and accessories, depth of which ranges from 1,000 ... , and we can also develop new rig as users’ special request.The drilling rigs are used to explore, develop ... accessories are according to API specifications.5,000m serial drilling rigs have those types: ZJ50L, ZJ50JD, ZJ50LD, ZJ50JD, ...