Surface Set Diamond Bit

Natural diamond surface set bits differ from impregnated bits in that they only have a single layor of diamonds set onto the working surface of bits according to a pre-determined pattern. Its water ways are usually shallower than an impregnated bit because of the single layor of diamonds. Some bits are designed with Face Discharge holes to minimize core wash when drilling in soft or fractured formations.

We manufacture a wide range of surface set bits, which includes a variety of profiles, diamond grades and sizes designed to provide the most efficient cutting ability in all different rock formations.

Some other types of bits such as pilot type, special discharge type or concave type non-coring special purpose bits are available on request.

Rule of thumb: The harder the rock is, the smaller the diamonds we should use.

Number of Stones is very important factor in determining how well a bit will cut. Our engineers use mathematical formulas to set each diamond on bit cutting area to ensure proper overlap with a minimum of diamonds to keep the carat weight (and initial bit cost) as low as possible in a balanced design.

Diamond Grade is the most important factor to take into consideration when selecting a bit. As it affects total meters drilled and therefore affects cost per meter drilled, it obviously also affects bit price. The diamonds we use have been selected carefully and also have been improved over the years. Our most stringent quality control and practices ensure constant reproduction ability of lower cost per meter.

Customers have three (3) choices of natural diamonds:

A - Economy quality natural diamond.
AA - Medium quality natural diamond
AAA - High quality natural diamond.

DIAMOND BIT CROWN SHAPES
PROFILE	APPLICATION
Semi-Round	Suitable for drilling medium-hard rocks. Diamond distribution on the bit face is well, therefore this crown bit can also serve few broken and loose formations.
Flat	For impregnated diamond bit only. Suitable for drilling various hardness and abrasiveness rocks.
Face Discharge	Suitable for drilling sedimentary or metamorphic formations containing some more powder mineral. It can prevent excessive core washing out, so as to get high coring percentage.
Stepped	Suitable for drilling medium-hard, fractured or interbedded formations, hole deviation can be prevented.
Serrated (V-Ring)	Suitable for drilling hard and dense formations with high penetration rate.

STANDARD DIAMOND SIZE RANGE
DIAMOND SIZE (SPC)	ACTUAL NUMBER OF STONES PER CARAT
6/8	6 - 8
10	9 - 12
15	13 - 20
25	21 - 35
50	36 - 60
75	61 - 90
100	91 - 120

GLOBAL LEADER IN DRILLING INNOVATION

Surface Set Diamond Bit

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