Surface-Set Diamond Bit
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  • PRODUCT DETAILS
  • Core Bit and Reaming Shell Sizes
Surface-set diamond bit which is bit with long service life and good penetration in soft to medium hard formations, also is suitable for abrasive and  unconsolidated formations that are not effectively drilled by impregnated diamond bits. They are also recommended for use in drilling harder formations where the available rotational speeds and bit loads are insufficient to use impregnated diamond bits due to drilling equipment limitations. The quality is various by the range of natural diamond grade, grain sizes, and face profiles, China Geo-Equip Tech only manufacture the surface set diamond bit with high quality natural diamond, all we strive is for ensuring good performance at job site.

Available sizes for surface-set diamond bit we manufactured:

  • AQ, BQ, NQ, HQ, PQ
  • T2-56, T2-66, T2-76, T2-86, T2-101
  • T6-86, T6-101, T6-131

Tips for choosing a right surface set diamond bit for your project:

The harder the rock is, the smaller diamonds should be used. The amount of diamonds is one of very important factors to the bit cutting efficiency, our engineers use sophisticated formulas to set each diamond on bit cutting area to ensure proper overlap with a minimum of diamonds to keep the initial bit cost as low as possible in a balance design.

Diamond Grain Size Selection (SPC):

  • 10/15 spc: Soft to Medium Formation
  • 20/25 spc: Medium to Hard Formation
  • 30/40 spc: Medium Hard to Hard Formation
  • 40/60 spc: Hard Formation
  • 60/80 spc: Hard to Very Hard Formation
Different profiles of the bits shapes are for our customers to achieve best of performance according to various of rock formations
  • Semi-round ( STD ) Type
    Standard profile, super strong in hard broken formations.
  • Stepped Type
    High penetration and stability but fragile in hard fractured formation, pay attention to rotation speed is needful.
  • Conical Type
    Good penetration rate and stability. Stronger than stepped profile.

Type

Core bit

Reaming shell

Outer Diameter

Inner Diameter

Outer Diameter

Inch

mm

Inch

mm

Inch

mm

BTW

2.345

59.56

1.667

42.35

2.36

59.95

NTW

2.965

75.31

2.218

56.35

2.98

75.7

HTW

3.762

95.57

2.809

71.35

3.783

96.09

AQ

1.875

47.63

1.062

26.97

1.89

48.01

BQ

2.345

59.56

1.433

36.4

2.36

59.95

BQ3

2.345

59.56

1.32

33.53

2.36

59.95

NQ

2.965

75.31

1.875

47.63

2.98

75.7

NQ3

2.965

75.31

1.775

45.08

2.98

75.7

HQ

3.762

95.57

2.5

63.5

3.783

96.09

HQ3

3.762

95.57

2.406

61.11

3.783

96.09

PQ

4.805

122.05

3.345

84.96

4.828

122.65

PQ-3

4.805

122.05

3.27

83.06

4.828

122.65

T2-56

2.205

56

1.642

41.7

2.224

56.5

T2-76

2.992

76

2.429

61.7

3.019

76.5

T2-86

3.385

86

2.823

71.7

3.406

86.5

T2-101

3.976

101

3.295

83.7

3.996

101.5

T6-101

3.976

101

3.11

79

3.996

101.5

T6-131

5.157

131

4.252

108

5.157

131.5

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