Turbine drilling tools are used widely in Russia oilfield, bits run with super high speed, rotary speed of turbine which is matched with 11 5/8” and 81/ 2” bits reaches to 400rpm ~600rpm, therefore, service life of normal cone bits is about 10 hours usually. Kingdream has invented roller-journal compound bearing for working situation with super high rotary speed, which matches with metal seal, in order to provide bit with high bearing reliability and long life in situation of super high rotary speed. Kingdream has also developed cutting structure and extended double nozzle hydraulic structure to be suitable for drilling with super high rotary speed. SMD super-high speed motor bit matches with turbine while be used in Russia market, the stable service life of bit can reaches to more than 30 hours in the work situation of above 400 RPM.

SMD super-high speed motor bit is recommended to work in high rotary speed from 250rpm to 600rpm, which is quite economical.

Patented roller-journal composite bearing technology is used on SMD bit.This  new bearing package combines the advantages of both roller bearing and journal bearing,together with metal face seal, insures reliability of the bit under high RPM and high WOB.

Working environment of the bits' structure becomes more severe uder ultra-high RPM conditions.SMD bits uses selected carbide inserts with the strength and hardness of the inserts are matches properly.Cutter layout is optizmized and new matchining process for drilling insert hole is used to reduce or even eliminate insert breakage and loss during drilling.

Special hydraulic system with double extended nozzles can remove large amount of drilling cuttings generated from fast drilling operations  and eliminate drilling cutting logjamming area at the bottom hole and therefore facilitate up removal of the drilling cuttings.