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Diamond casing shoe bits: The inner sides of casing shoe bits are NOT set with diamonds, it flush with the inside diameter of the casing. the corresponding size of core bits and core barrels can get through the inner diameter of the casing shoe bits freely.

Diamond casing bits: The inner sides of casing bits are set with diamonds, the diameter size is smaller than casing shoe bits, so that the core barrels can NOT get through.

surface set diamond casing and casing shoe bits are featured with a layer of natural diamond normally on the active places of the bit crown on a particular predetermined pattern. Unlike the impregnated diamond type, these surface set diamond bits are usually made in semi-round crown making it ideal for drilling formations from soft to hard. These type of diamond grits are normally mounted on a bit crown-powdered metal matrix body that’s anchored to a robust steel body. Because of the diamond unique characteristics, S.S core bits offer super-fast drilling efficiently for long hours. Most impregnated diamond bits which its powdered metal bit can expose new diamond crystals because of uncontrolled erosion, while surface set diamond bit crowns feature a toughened metal bond matrix making it robust, resilient and tough. Actually, the true function of the bit crown metal matrix body on this type of surface set diamond casing and casing shoe bits is to securely hold the diamonds in the right place throughout their operational lifetime.

The strength of the surface set diamond type comes straight from the mold, which is normally subjected to extreme thermal treatment, hence ensuring metallurgical bond of the matrix on the steel body. Surface set Natural diamond casing and casing shoe bits are manufactured for use in drilling abrasive, soft and unconsolidated formations that will be more efficient than impregnated diamond bits. Nevertheless, they can also be used to drill harder formations whenever there is lack of enough rotational speeds. In most cases, surface set diamond bit crown close up providing a high rate of penetration in drilling formations of soft, medium and relatively high hardness. But because the surface set diamond bits are made with diamond crystals exposed on matrix, they’ll perform a lower bit life than impregnated diamond casing and casing shoe bits.

Adavantages of surface set diamond casing and casing shoe bits:

· Maximum Penetration – As mentioned earlier, due to the robust nature and resilient nature of surface set diamond casing and casing shoe bits, they can produce optimal performance giving out maximum penetration. This is because of the greater degree of exposure of individual diamond grits.

· High Quality – Not only are the diamonds tough, the thermally treated metal matrix is of high quality which boosts the functionality of these surface set diamond casing and casing shoe bits.

· Diversity – The surface set diamond bits can be used for both soft and hard formations. However, higher rotational speeds will be needed in the case of harder formations. They are sharp enough to drill hard rocks.

· Longevity – The durability of the surface set diamond bits cannot be underestimated. So long as they’re used as it is supposed to be, they can last for significant amount of time without causing any problem.

· Versatility – These diamond casing and casing shoe bits can be customized to suit the needs of a particular client. The range one could get include variety of diamond grades, mesh sizes, matrix profiles, and we offer a cost effective solution for mining.