Available sizes for surface-set diamond bit we manufactured:
- AQ, BQ, NQ, HQ, PQ
- T2-56, T2-66, T2-76, T2-86, T2-101
- T6-86, T6-101, T6-131
Semi-round ( STD ) Type
Standard profile, super strong in hard broken formations.
Surface-Set Diamond Bit
Surface-Set Diamond Bit
- Mobile: +86-18851513960 /
- whatsapp: +86-18851513960
- E-mail: sales@chinageotec.com
Surface-set diamond bit which is bit with long service life and good penetration in soft to medium hard formations, also is suitable for abrasive and unconsolidated formations that are not effectively drilled by impregnated diamond bits. They are also recommended for use in drilling harder formations where the available rotational speeds and bit loads are insufficient to use impregnated diamond bits due to drilling equipment limitations. The quality is various by the range of natural diamond grade, grain sizes, and face profiles, China Geo-Equip Tech only manufacture the surface set diamond bit with high quality natural diamond, all we strive is for ensuring good performance at job site.
Tips for choosing a right surface set diamond bit for your project:
The harder the rock is, the smaller diamonds should be used. The amount of diamonds is one of very important factors to the bit cutting efficiency, our engineers use sophisticated formulas to set each diamond on bit cutting area to ensure proper overlap with a minimum of diamonds to keep the initial bit cost as low as possible in a balance design.
Diamond Grain Size Selection (SPC):
- 10/15 spc: Soft to Medium Formation
- 20/25 spc: Medium to Hard Formation
- 30/40 spc: Medium Hard to Hard Formation
- 40/60 spc: Hard Formation
- 60/80 spc: Hard to Very Hard Formation
Different profiles of the bits shapes are for our customers to achieve best of performance according to various of rock formations
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-
Stepped TypeHigh penetration and stability but fragile in hard fractured formation, pay attention to rotation speed is needful.
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Conical TypeGood penetration rate and stability. Stronger than stepped profile.
|
Type |
Core bit |
Reaming shell |
||||
|
Outer Diameter |
Inner Diameter |
Outer Diameter |
||||
|
Inch |
mm |
Inch |
mm |
Inch |
mm |
|
|
BTW |
2.345 |
59.56 |
1.667 |
42.35 |
2.36 |
59.95 |
|
NTW |
2.965 |
75.31 |
2.218 |
56.35 |
2.98 |
75.7 |
|
HTW |
3.762 |
95.57 |
2.809 |
71.35 |
3.783 |
96.09 |
|
AQ |
1.875 |
47.63 |
1.062 |
26.97 |
1.89 |
48.01 |
|
BQ |
2.345 |
59.56 |
1.433 |
36.4 |
2.36 |
59.95 |
|
BQ3 |
2.345 |
59.56 |
1.32 |
33.53 |
2.36 |
59.95 |
|
NQ |
2.965 |
75.31 |
1.875 |
47.63 |
2.98 |
75.7 |
|
NQ3 |
2.965 |
75.31 |
1.775 |
45.08 |
2.98 |
75.7 |
|
HQ |
3.762 |
95.57 |
2.5 |
63.5 |
3.783 |
96.09 |
|
HQ3 |
3.762 |
95.57 |
2.406 |
61.11 |
3.783 |
96.09 |
|
PQ |
4.805 |
122.05 |
3.345 |
84.96 |
4.828 |
122.65 |
|
PQ-3 |
4.805 |
122.05 |
3.27 |
83.06 |
4.828 |
122.65 |
|
T2-56 |
2.205 |
56 |
1.642 |
41.7 |
2.224 |
56.5 |
|
T2-76 |
2.992 |
76 |
2.429 |
61.7 |
3.019 |
76.5 |
|
T2-86 |
3.385 |
86 |
2.823 |
71.7 |
3.406 |
86.5 |
|
T2-101 |
3.976 |
101 |
3.295 |
83.7 |
3.996 |
101.5 |
|
T6-101 |
3.976 |
101 |
3.11 |
79 |
3.996 |
101.5 |
|
T6-131 |
5.157 |
131 |
4.252 |
108 |
5.157 |
131.5 |
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