Novel choke device suitable for air reverse circulation drilling technology

The utility model provides a novel choke device suitable for an air reverse circulation drilling process. The novel choke device comprises a thrust bearing, an upper gland, a lower gland, an annular nylon keel and an annular wear-resistant rubber ring, the annular nylon keel and the annular wear-resistant rubber rings are alternately mounted on the periphery of a shell of the thrust bearing; and the upper gland and the lower gland are respectively arranged at the upper part and the lower part of the thrust bearing. 本发明提供的本实用新型提供的一种适用于空气反循环钻井工艺的新型阻风装置包括：推力轴承、上压盖、下压盖、环形尼龙骨和环形耐磨胶圈；所述环形尼龙骨和所述环形耐磨胶圈交替安装在所述推力轴承的壳外围；在所述推力轴承的上下分别设置有所述上压盖和所述下压盖。