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Sinodrills Symmetric/Centrex/Symmitrix Drilling System
Symmetric is a concentric drilling system with retrievable pilot bits.
This system drills in any direction and in any type of ground condition.
It is, in fact, the most flexible and efficient overburden system on the market today.
The Symmetric components are made up of:
---A pilot
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Sinodrills DTH Bit DHD350-152, COP42-127, QL60-203
DTH bit diameter: 76mm to 311mm.
DTH bit shank style: DHD shank, COP shank, SD shank, QL shank, Mission shank, Mach shank, etc.
DTH bit face design: Flat face, convex face, concave face, DGR.
DTH bit carbides style: hemi-spherical, Parabolic, and Ballistic.
We can design by customer's
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Sinodrills Cross Bit
Taper Cross Bit
Cross bit diameter: 30mm, 32mm, 35mm, 38mm, 41mm, etc.
Cross bit degree: 4 degree 46 point, 7 degree, 11 degree, 12 degree, etc;
Thread Cross Bit
Cross bits diameter: 33mm--64mm
Cross bit sizes: R22, R25, R28, R32, R35, R38, T38, T45, T51, GT60, ST58, ST68, SR32, and
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Sinodrills Button Bit
Taper Button Bit:
Button bit diameter: 28mm, 30mm, 32mm, 34mm, 36mm, 40mm, etc.
Button bit degree: 4 degree 46 point, 7 degree, 11 degree, 12 degree, etc;
Threaded Button Bit:
Button bit diameter: 38mm to 152mm;
Button bit thread: R22, R25, R28, R32, R35, R38, T38, T45, T51, GT60, ST58, ST68, SR32, and SR35;
Button