BORE BIT WITH SEALED OIL FILLED SUPPORT

摘要

FIELD: oil and gas production. ^ SUBSTANCE: bore bit with filled oil filled support consists of case of welded sections of brackets, on journals of which there are movably fastened roller cutters with rock breaking teeth and cavities of bearing supports with sealing elements. The packing units are taken off zone of journals base into recesses made on ends of the roller cutters. ^ EFFECT: increased bearing ability of big friction bearing resulting in increased wear resistance of support and bore bit in whole. ^ 3 cl, 7 dwg