PDC Core Bit
The diamond core bits mainly comprise three types like single tube, double tubes and wire-line. The design of surface discharger flow passage can reduce the corrosion of the mud to the rock core. The PDC teeth and the natural diamond are used for mixed gauge protection, and the patented surface strengthening technology is used. Therefore, the coring bit has the advantages of high rate of penetration, high yield percentage of core and long life time. The coring bits have complete range of specifications, and the customers can choose the product according to their production demand and the change of the rock formation.
In the technical scheme of the kerve gauge protection, the diamonds are embedded in the longitudinal or lateral groove to form a roof comb by sintering. As a result, the gauge protection part can obtain the best cleaning and cooling effects.
The PDC cutting teeth are arbitrarily arranged in the ledge spirally in high density to ensure the steady operation of the bit with high speed.
Core Type | Type | Core Diameter (mm) | Weight on Bit (KN) | Rotation Speed (r/min) |
Single Barrel | Sq 76 | 70 | 3-11 | 80-200 |
Sq 98 | 70 | 3-11 | 80-200 | |
Sq 113 | 70 | 3-11 | 80-200 | |
Sq 125 | 80 | 5-12 | 80-200 | |
Sq 133 | 80 | 5-12 | 80-200 | |
Double Barrels | SQ 4 1/8 | 45 | 10-58 | 80-500 |
SQ 5 1/4 | 70 | 10-58 | 80-500 | |
SQ 6 | 70 | 10-58 | 80-500 | |
SQ 7 1/2 | 89 | 22-80 | 80-500 | |
SQ 8 1/2 | 101 | 22-80 | 80-500 | |
SQ 9 1/2 | 105 | 40-100 | 80-500 |