Івано-Франківський державний технічний університет нафти і газу
Ивано-Франковский государственный технический университет нефти и газа
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Application filed by Івано-Франківський державний технічний університет нафти і газу, Ивано-Франковский государственный технический университет нефти и газаfiledCriticalІвано-Франківський державний технічний університет нафти і газу
Priority to UA95010070ApriorityCriticalpatent/UA15155A/en
Publication of UA15155ApublicationCriticalpatent/UA15155A/en
The invention relates to oil-and-gas equipment, in particular to designs of roller cutter drill bits. Drill-bit bearing structure has peripheral and retaining drill bit bearings where retaining bearing is lined with anti-friction material. Peripheral bearing is made as one part with retaining one with following lining of continuous structure with anti-friction material, most probably with bronze.
UA95010070A1995-01-031995-01-03Support of roller cutter drill bit
UA15155A
(en)
Drill string fitting with rotatable mounts on body exterior housing rollers that can rotate so as to reduce friction in axial and transverse directions