Impregnated Diamond Core Bits:

The impregnated diamond core bits are the most commonly useful bits in the mineral exploration industry, as they have the widest range of application. The carefully selected grades of high quality synthetic diamond are distributed in the depth of impregnated bit's matrix series. The matrix layer of the SD Drill contains a uniform distribution of these crystals that are embedded in a powdered metal bond.

Impregnated Diamond Core Bits Matrix Height:

Our standard matrix height is 6mm, and the max we can do is 25mm matrix height.

Generally, 6mm height is recommended for conventional bits, 8mm or higher are recommended for wireline bits.

Bit Crown Profiles for Diamond Core Bits:

To suit various drilling conditions encountered and meet worldwide customer's requirements, our engineers produces core bits in corresponding crown profiles.

The basic profiles are below. Some special profiles may not be available in certain bit sizes due to the improper kerf width or matrix hardness of the bit.

W Profile - Standard profile for most impregnated diamond drill bits, usually produced in a matrix height over 6mm. It provides good drilling stability and is suitable for various formations.

Flat Profile - It's suitable for various rocks, often used in impregnated casing bits & casing shoe bits as well as the bits with very hard matrices F1/ F2 series.

Cross Profile - It's especially designed for ultra-hard formations, such as granite (hardness 8-9), ganister, quartzite, siliceous limestone, chert, etc.

Semi-Round Profile - Impregnated diamond bits with this profile are recommended for use in highly fractured formations with good drilling stability. Surface set diamond bits of this style have a long drill life and the matrix is not easy to be damaged.

Multi-Step Profile - Multi-step type impregnated diamond bits are suitable for soft to medium hard formations and alternating hard- soft formations. With very good drilling stability, it makes the borehole not liable to deflection and the penetration fast. This profile is also often adopted in thick-kerf surface set diamond core bits, with good drilling stability and fast penetration.

Waterway Configurations:

1. Standard Type (no discharge hole) - Waterway without discharge hole is the standard type, applied in many normal formations.

2. Wide Type - This waterway is wider than the standard type, applied in formations in which there is much rock debris, eg. clay, shale, coal gangue, etc.

3. Turbo Type - It's suitable for relatively hard fractured formations or hard competent formations.

4. Wide Turbo Type - Suitable for medium hard fractured formations where there is much slurry and rock debris.

5. Round Face Discharge Hole Type - It's suitable for triple core barrels, to improve recovery rate. It reduces the flushing fluid's erosion against the core during drilling.

6. Slot Face Discharge Hole Type - It's often adopted in PDC bits, TSP bits, and has bigger flow capacity, which minimizes the occurrence of discharge hole blockage. It's suitable for drilling in fractured formations where there is much flushing fluid and rock debris.

7. Trapezoid Type - It's suitable for the core bits with a thick matrix, it facilitates debris removal and flow capacity, and make the bit wear out evenly.

Matrix Index for Impregnated Diamond Core Bits:

Notes:

WLA - AQ

WLB - BQ

WLN - NQ

WLH - HQ

WLP - PQ

Imp. - Impregnated Diamond Type

S.S. - Surface set Diamond Type

T.C. - Tungsten Carbide Type

PDC - Polycrystalline Diamond Compact Type

TSP - Thermally Stable Diamond Polycrystalline Type

E.P. - Electroplated Diamond Type