impregnated diamond core bits with matrix height of 6mm for conventional core bits, 8mm, 9mm, 10mm, 12mm, 14mm for wireline core bits.

bits Matrix crown W profile is the standard profile for most impregnated bits, usually produced in a matrix height over 6mm. It provides good drilling stability and is suitable for various formations.

bits Matrix crown flat profile is suitable for various rocks, often used in impregnated casing bits, casing shoes as well as the bits with very hard matrices (e.g. F1, F2).

bits Matrix crown cross profile is especially designed for ultra-hard formations, such as granite (hardness 8-9), ganister, quartzite, siliceous limestone, chert, etc.

bits Matrix crown Semi-round profile: Impregnated bits with this profile are recommended for use in highly fractured formations with good drilling stability. Surface set bits of this style have a long bit life and the matrix is not easy to be damaged, surface set is mostly used in the core bits with bit kerf thickness less than 11mm. It can drill various formations. core bits with semi-round profile has long bit life, and can avoid damage. when the bit kerf thickness is over 11mm with semi-round profile can be applied in drilling abrasive formations.  

bits Matrix crown Multi-step profile: impregnated 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 core bits, with good drilling stability and fast penetration. when core bit kerf thickness is over 11mm with stepped profile, core bits can obtain high penetration rate with good stability in drilling. but we don't recommend multi-stepped core bits 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.

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

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.

Turbo Type: It’s suitable for relatively hard fractured formations or hard competent formations.

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

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.

Slot Face Discharge Hole Type: It’s often adopted in PDC bit, TSP bit, 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.

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.