SMD Roller Cone Drilling Bits is designed with roller-journal composite bearing and metal face seal.
In consideration of this high speed drilling condition, We specially developed the SUPER-MD ultra-high speed motor bit ,The bit is also equipped with advanced cutting structure and special hydraulic system with double extended nozzles that are suitable for high RPM drilling operations. This new Super-MD bit features high bearing reliability and long working life under high speed drilling conditions. SUPER-MD Ultra-high speed motor bit has structure features of metal face sealed, special cone shell protection, enhanced head O.D. Protection and enhanced gage protection, so that the bit is suitable for drilling at ultra-high RPM drilling applications.
• It is recommended that SMD bits should be run within the range of 250 to 600 RPM in order to get better and economic drilling result.
• The size range of SMD series bit is 8 3/4 – 11 5/8 inch and its IADC code is 417 – 617.
SMD bit features long service life, high reliability and high ROP under ultra-high rotary speed conditions
Roller journal composite bearing with metal face seal
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 higher reliability of the bit under high RPM and high WOB.
Advanced cutting structure suitable for ultra-high
RPM drilling
Working environment of the bit’s cutting structure becomes more severe under ultra-high RPM conditions. SMD bits uses selected carbide inserts with the strength and hardness of the inserts are matched properly. Cutter layout is optimized and new machining process for drilling insert hole is used to reduce or even eliminate insert breakage and loss during drilling.
Highly efficient hydraulic system
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.
