Drilling mud circulating purification system

The utility model provides a drilling mud circulation purification system. The drilling mud circulation purification system comprises a circulation pool, a mud pool, a stirring device and a mud backflow device. And the circulating pool is communicated with the drilling well so as to fully precipitate solid-phase particles in the slurry. And the mud pool is communicated with the circulating pool so as to store the settled mud. The stirring device works in cooperation with the mud pit and is configured to refine mud in the mud pit. The mud backflow device communicates with the mud pool and the drilling well so that the refined mud can be injected into the drilling well. The drilling mud circulation purification system can prevent drilling mud from flowing back into a well to cause safety accidents in the well, can purify the mud to the maximum extent, and is energy-saving and environment-friendly. 本实用新型提供了一种钻井泥浆循环净化系统，钻井泥浆循环净化系统包括循环池、泥浆池、搅拌装置和泥浆回流装置。循环池与钻井连通，以充分沉淀泥浆中的固相颗粒。泥浆池与循环池连通，以储存沉淀后的泥浆。搅拌装置与泥浆池配合工作，配置成将泥浆