Diamond core bit
Sizes Available:
Diamond core drill bits and diamond non-core drill bits
A-Gauge Core Bits: A, A-RSG, AWG(AX), AWM, AWT, LTK48
B-Gauge Core Bits: B, B-RSG, B-2.400, B3, BWG(BX), BWM, BWT, LTK60, TBW, BX
N-Gauge Core Bits: N, NMLC, NWG(NX), NWM, NWT, TNW, NX
H-Gauge Core Bits: N, HMLC, HWF-Long, HWF-Short, HWG(HX), HWT, 412F, HX
P- Gauge Core Bits: P, P3, PWF-Long, PWF-Short
S- Gauge Core Bits: SWF-Long, SWF-Short
U- Gauge Core Bits: UWF-Long, UWF-Short
Z- Gauge Core Bits: ZWF-Long, ZWF-Short
T, TT, T2 &TB Series Metric Core Bits: T36, TT46, T2-46, TB56, TT56, T2-56, T2-66, T2-76,
T2-76 coreline, T2-86, T2-86 coreline, T2-101, T2-101 coreline
T6 Series Metric Core Bits: T6-76, T6-86, T6-101, T6-116, T6-131, T6-146
T6S Series Metric Core Bits: T6S-76, T6S-86, T6S-101, T6S-116, T6S-131, T6S-146
and all other standard CDDA, DCAMA, Crealius, and ISO sizes .
Features:
This type of bit is primarily recommended for use in drilling relatively soft, abrasive, unconsolidated formations that are not effectively drilled by impregnated diamond bit. It is also recommended for use in drilling harder formations where the available rotary speeds and bit loads are insufficient to use impregnated diamond bits due to drilling equipment limitations.
Principle of choosing diamond size--the harder the rocks, the smaller the diamond size should be.
Diamond Size | Formation Drilled |
10/20 SPC* | Soft formation |
20/30 SPC | soft to medium formation |
30/40 SPC | medium formation |
40/60 SPC | Medium to hard formation |
< 60/80 SPC | Very hard formation |
*SPC is short for Stone per Carat **40/60 is FIT standard diamond size for natural diamond core bit ***Other sizes are available as per request |
Profiles of surface set core bit:
- Semi-round: it is mostly used in the core bit with bit kerf thickness less than 11mm. It can drill various formations. The core bit with semi-round profile has long bit life, and can avoid damage; while the bit kerf thickness is over 11mm with semi-round profile can be applied in drilling abrasive formations.
- Stepped profile: core bit kerf thickness over 11mm usually has this kind of profile. Bit with Stepped profile can obtain high penetration rate with good stability in drilling. However, it is not recommended in fractured very abrasive formations. When the core bit of bit kerf less than 11mm has stepped profile can facilitate drilling speed and have better drilling stability.
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Stepped profile Semi-round profile
We can manufacture all kinds of I diamond core drill bits and reaming shells according
to customer's special requirement.