FIELD: bore-hole drilling equipment. SUBSTANCE: this relates to design of rolling-cutter bits intended for drilling deep bore-holes for gas and oil. Sealing unit for support of rolling-cutter bit accommodates journal, rolling cutter, disk-type seal stationary fastened on journal, circular seal, and flexible member. Disk-type seal is made rubberized, circular seal is metal-made and self-positioning. Aforesaid circular metal seal is kept in contact with disk-type rubberized seal through flexible member. This makes drilling bit support sealed reliably. EFFECT: higher efficiency. 1 dwg
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Authors
Dates
1998-06-27—Published
1996-12-10—Filed