Surface-set diamond bits can be used with any type of core barrels. By varyingthe diamond grade, size, quality, and matrix hardness andcrown shapes , the users can satisfactorilydrill and core hard and homogeneous formations. To avoidexcessive matrix wear at the leading edge of each segment, tungsten carbide inserts are fitted on each side of the water way .this kind of bits cannot be used in broken or loose formations.
Rockcode surface set bits have proven to have high penetration rate, long service life, and best adaptability to chang formation.
Matrix
Our company produces Surface-Set Diamond Core Bits with a hard matrix formula that is highly wear-resistant.
Crown
We produce variety of crown profiles to meet diverse drilling requirements, Standard Crown Profiles for Surface-Set Diamond Bits:
Multi-Step Crown – Enhanced stability in hard formations
Conical/Rounded Crown– Balanced penetration and durability
Flat-Face with Bottom Flush – Efficient cuttings removal in deep holes
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Diamond Quality
Diamond Selection Standards for Surface-Set Bits
We exclusively use high-quality natural round diamonds in our surface-set bits. These diamonds feature:
Exceptional internal density
Superior impact resistance
Diamondsizes (SPC)
Diamond Grain Size Selection Guide for Surface-Set Bits
Recommended Diamond Specifications by Formation Type:
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Formation Type |
Diamond Size |
Grain Density (Stones/Carat) |
Technical Advantage |
|
Soft Formations |
Large-Grain Diamonds |
15 stones/ct |
Enhanced cutting efficiency in low-abrasive strata |
|
Medium-Hard Formations |
Medium-Grain Diamonds |
20-30 stones/ct |
Balanced wear resistance & penetration rate |
|
Hard Formations |
Fine-Grain Diamonds |
40-60 stones/ct |
Maximized matrix retention in abrasive conditions |
