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 ... develop new rig as users’ special request.The drilling rigs are used to explore, develop oil, gas and ... accessories are according to API specifications.5,000m serial drilling rigs have those types: ZJ50L, ZJ50JD, ZJ50LD, ZJ50JD, ...