Surface Set Natural Diamond Core Bits
Model:
Type:
Standard:
Product Description
Key Features
Surface Set Core Bit is much superior compared with other companies’ products, as it is made of natural diamond of high quality.
Surface Set Diamond Bits are used for drilling relatively soft, abrasive, unconsolidated formations which usually can not be drilled by impregnated diamond bits effectively. Secondly, drilling for harder formations is also possible when the available rotational speed and bit loads are insufficient for utilizing impregnated diamond bits. Additionally, this diamond tool is also suitable for drilling broken formation rocks which cannot be cored.
Multi-Hardness Matrices
Forged in Extreme Heat,
Our diamond core bits are born from a precisely controlled High-Temperature, High-Pressure (HTHP) sintering process. This advanced technique fuses premium synthetic diamonds with a specialized metal matrix at the molecular level, creating a supremely dense and uniform structure. The result is a cutting crown of unparalleled integrity—engineered for consistent performance, superior wear resistance, and maximum lifespan in the most demanding drilling environments.
Specifications
| Sizes of Core Bits and Reaming Shells | ||||||
| Description | Core bit | Core bit | Reaming shell | |||
|
Model |
Outside Diameter | Inside Diameter | Outside Diameter | |||
| Inches | mm | Inches | mm | Inches | mm | |
| BTW | 2.345 | 59.56 | 1.667 | 42.1 | 2.36 | 59.95 |
| NTW | 2.965 | 75.31 | 2.218 | 56.1 | 2.98 | 75.7 |
| HTW | 3.762 | 95.57 | 2.809 | 71.1 | 3.783 | 96.09 |
| AC(AQ) | 1.875 | 47.63 | 1.062 | 26.97 | 1.89 | 48.01 |
| BC(BQ) | 2.345 | 59.56 | 1.433 | 36.4 | 2.36 | 59.95 |
| BC3(BQ3) | 2.345 | 59.56 | 1.32 | 33.53 | 2.36 | 59.95 |
| NC(NQ) | 2.965 | 75.31 | 1.875 | 47.63 | 2.98 | 75.7 |
| NC3(NQ3) | 2.965 | 75.31 | 1.775 | 45.08 | 2.98 | 75.7 |
| HC(HQ) | 3.762 | 95.57 | 2.5 | 63.5 | 3.783 | 96.09 |
| HC3(HQ3) | 3.762 | 95.57 | 2.406 | 61.11 | 3.783 | 96.09 |
| PC(PQ) | 4.805 | 122.05 | 3.345 | 84.96 | 4.828 | 122.65 |
| PC3(PQ3) | 4.805 | 122.05 | 3.27 | 83.06 | 4.828 | 122.65 |
| T2-56 | 2.205 | 56 | 1.642 | 41.7 | 2.217 | 56.3 |
| T2-76 | 2.992 | 76 | 2.429 | 61.7 | 3.004 | 76.3 |
| T2-86 | 3.385 | 86 | 2.823 | 71.7 | 3.398 | 86.3 |
| T2-101 | 3.976 | 101 | 3.295 | 83.7 | 3.988 | 101.3 |
| T6-101 | 3.976 | 101 | 3.11 | 79 | 3.996 | 101.5 |
| T6-131 | 5.157 | 131 | 4.252 | 108 | 5.157 | 131.5 |
Standard Profiles for Surface Set Core bits:
- Multi-steps
- Semi-round
- Face discharge (FD)
- Non-coring bits with concave profile
To choose a right surface set for the formations drilled, we need at least consider the following aspects: diamond size, diamond grade, profile design.
| Diamond Size | Formation Drill |
| 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 standard diamond size for natural diamond core bit ***Other sizes are available as per request |
|
Application
COMMON DESIGN MODIFICATIONS INCLUDE:
- Thread Type
- OD Size
- Crown Profiles for surface set bits
- Solutions for special rock conditions
- Cutter size for PCD bits
Evaluate the four criteria below to make an initial selection.
- Rock Hardness LOW? Use lower bit ； HIGH? Use higher bit
- Rock Grain Size LARGE? Use lower bit ；FINE? Use higher bit
- Formation Drill Power LOW? Use higher bit ； HIGH? Use lower bit
- BROKEN? Use lower bit ； COMPETENT? Use higher bit
- Fine tune for the selection of the next bit.
- TIP SLOW penetration rate? Try higher bit ; SHORT bit life? Try lower bit
We are the earliest factory to produce drilling tools which have more than 20 years experience.
We are in Wuxi City,China,where is near Shanghai,we can pick you up at the airportsor railway stations.
Our MOQ is 1 pc.
We’re happy to provide small value free samples at your delivery cost.
Yes,we are happy to do customized products if you can provide drawing or samples.
Yes,put on your logo is available.
We will replace the products by free if the problems were caused by us.If it is the men-made problems,
