ZJ40/2250DB oil rig is a kind of advanced electric drilling rig. It can be used for the exploration and development of oil and gas wells, and it is applicable to 2 500～4 000 m depth operation. The rig has superior performance in meeting the requirements of petroleum drilling technology. Mechanicaldriven drilling rigs and DC drive drilling rig beyond compare.
2013, 33 (4):
74-78.
