Surface Diamond Core Bits

This type of bit is primarily recommended for use in drilling relatively soft, abrasive, unconsolidated formations that are not effectively drilled by impregnated diamond bit. It is also recommended for use in drilling harder formations where the available rotary speeds and bit loads are insufficient to use impregnated diamond bits due to drilling equipment limitations.

Parameter

Size	Outside Diameter		Inside Diameter
	inch	mm	inch	mm
AQ	1.880/1.870	47.75/47.50	1.607/1.057	27.10/26.85
BQ	2.350/2.340	59.69/59.44	1.438/1.428	36.52/36.27
NQ	2.970/2.960	75.44/75.19	1.880/1.870	47.75/47.50
HQ	3.770/3.755	95.76/95.38	2.505/2.495	63.63/63.38
PQ	4.815/4.795	122.30/121.80	3.350/3.340	85.09/84.84

Application

1. Surface set diamond core bits are widely used for the site investigation and mineral exploration.
2. Surface set diamond core bits can be used with NMLC core barrels.
3. Surface set diamond core bits are primarily recommended for use in drilling relatively soft, abrasive, unconsolidated formations.
4. In most cases, Surface-set diamond core bits will provide higher rates of penetration than in softer formations due largely to the greater degree of exposure of the individual diamond crystals.
5. Drill soft to hard rock, widely used in all kinds of drillings for prospecting, water and electricity building and construction industry of road, railway, bridge and building taking out core to examine stake, etc

Surface-set Diamond Core Bits

Information on drill bit, core bit and horizontal drill bit products - sales and rebuilding.

Supplier of super-abrasive products of synthetic polycrystalline diamond compacts, polycrystalline diamond inserts, polycrystalline diamonds and polycrystalline diamond compact core bits.

Manufactures wide range of diamond blades, bits, cupstones, and several specialized products for use with concrete, masonry, and stone materials. Also offers core bit retipping and repair service.

China Core Drill Bit

Information on drill bit, core bit and horizontal drill bit products - sales and rebuilding.

Manufacturer of diamond drilling equipment, core bits, reaming shells, casing shoes and other downhole equipment. Provides brochures, video and catalogue.

Exporter based in China, supplying diamond blades, core drill bits, cup wheels and polishing pads for the construction and home improvement industries. Also provides related tips and knowledge.