| Customized: | Non-Customized |
|---|---|
| Standard: | ISO 9001 |
| Length: | Stub-length |
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Surface Set Diamond Core Bit
The surface set diamond bit is produced from a single layer of natural diamond setting on the surface of bit crown with hard matrix.
Surface set diamond bit is mainly recommended for drilling soft to hard formations. Generally speaking, surface set diamond bit can provide satisfying penetration rate.
To choose a right surface set for the formations drilled, we need at least consider the following aspects: diamond size, diamond grade, profile design.
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 Forsun standard diamond size for natural diamond core bit ***Other sizes are available as per request |
|
Rule of selecting diamond grade--the harder the rocks, the better the diamond grade should be.
|
Diamond Grade |
Formation Drilled |
|
A Grade |
Soft formation |
|
AA grade |
Soft to medium formation |
|
AAA grade |
Hard to very hard formation |
|
*AA grade is Forsun standar diamond grade used in natural diamond core bit |
|
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