Connectors and corresponding drill bit with a standard shackle on. The tool is equipped with adjustable joints, adjustable gap between the inner core barrel and drill, the inner core barrel to compensate errors due to thermal expansion. Coremaster coring tool on the structure and 250P series coring tool is basically the same, the difference is the addition of an inner cylinder and the card centralizers heart indicator. Centralizer inner tube provides the best stability, when the composition of the shaft coring can increase the stiffness of the inner cylinder. Card heart indicator because the card when leaving the standpipe pressure increases the heart will issue a card heart signal ground, to ensure that the main reservoir is not due to wear and damage. In addition, Coremaster coring tube can be used in the case of motor 90b of inclination over coring.

Baker Hughes coring drill a mixture of tungsten carbide matrix made of corrosion-resistant, with high wear resistance, can extend the drilling time, cutting their teeth using PDC piece, natural diamond and artificial diamond Balas thermal stability, range Canton, for all strata coring.

Baker Hughes ARC series of anti-coring drill maneuver, relying on advanced technology to improve the anti-swirling ROP, drill and core quality of life. The main structure and performance characteristics are:

(1) The best of the cutting teeth are arranged to make this become a self-help type drill coring drill bit;

(2) reduce the number of cutting teeth;

(3) is flush with carbide inserts for low-friction gage teeth;

(4) improve the life of the cutting teeth, expand PDC coring bit range, reducing tool vibration, improving core quality, reduce card heart, no spiral borehole and core;

(5) Increase the depth of cut to improve the ROP and reduce filtrate invasion;

(6) to increase stability, so that the borehole and core rules.