Cone drill bits for different rock formations

1

     Soft

Soft mudstone,Soft shale,Clay,Salt rock,Sandstone,etc.

      0.25-0.90

150-80

       ＜10

2

   Middle

Shale,Sandstone,Limestone,etc.

      0.30-1.00

120-70

       ＜10

3

   Hard

      0.35-1.05

110-60

       ＜10

4

   Soft

     0.35-0.90

120-60

       ＜10

5

  Middle

Shale,Sandstone,Limestone,etc.

     0.50-1.00

100-50

       ＜10

6

  Middle

   Hard

Dolomite,Limestone,Hard shale,

etc.

     0.60-1.05

80-40

       ＜10

7

   Hard

Hard dolomite,Hard limestone,Hard sandstone,etc.

     0.70-1.00

70-40

       ＜10

8

Extremely    Hard

Quartzite,Flint,Basalt,Granite,Pyrite,etc.

     0.80-1.00

60-40

      ＜10

   JHJ117

  117

The back cone surface and all the tooth surfaces of the cone wheel are hardened, and the back cone is reinforced with carbide teeth to ensure the diameter.

0.30-0.90

 300-80

   JHJ127

 127

Extremely soft formations with low compressive strength and high drillability, such as shale, clay, salt rock, soft limestone, etc.

The back cone surface and all the tooth surfaces of the cone wheel are  hardened, and the back cone is reinforced with carbide teeth to ensure the diameter.

0.30-0.90

300-80

  JHJ137

137

Soft to medium soft strata with low compressive strength or soft rock strata with harder interlayers, such as hard gypsum, soft limestone, sandstone, etc.

The back cone surface and all the tooth surfaces of the cone wheel are hardened, and the back cone is reinforced with carbide teeth to ensure the diameter.

0.35-0.90

300-80

  JHJ417

417

Low compressive strength, high drillability, large sections of extremely soft formations, such as shale, clay, sandstone, conglomerate, etc.

Large diameter, top spoon-shaped inner row teeth, wedge-shaped outer row teeth, high exposed teeth, unequally spaced teeth

0.35-0.90

280-70

   JHJ437

Extremely soft formations with low compressive strength and high drillability, such as shale, clay, sandstone, soft limestone, salt rock, gypsum, etc.

Large diameter, top spoon-shaped inner row teeth, wedge-shaped outer row teeth, high exposed teeth, unequally spaced teeth

0.35-0.90

280-60

 JHJ447G

447

Extremely soft formations with low compressive strength and high drillability, such as shale, clay, sandstone, soft limestone, salt rock, gypsum, etc.

Large diameter, top spoon-shaped inner row teeth, wedge-shaped outer row teeth, high exposed teeth, unequally spaced teeth

0.35-1.00

240-60

 JHJ517G

517

Extremely soft formations with low compressive strength and high drillability, such as shale, clay, sandstone, soft limestone, salt rock, gypsum, etc.

Large diameter, top spoon-shaped inner row teeth, wedge-shaped outer row teeth, high exposed teeth, unequally spaced teeth

0.35-1.05

240-50

JHJ527G

527

Extremely soft formations with low compressive strength and high drillability, such as shale, clay, sandstone, soft limestone, salt rock, 

Large diameter, top spoon-shaped inner row teeth, wedge-shaped outer row teeth, high exposed teeth, unequally spaced teeth gypsum, etc.

0.35-1.05

240-50

 JHJ537G

537

Large diameter, top spoon-shaped inner row teeth, wedge-shaped outer row teeth, high exposed teeth, unequally spaced teeth

0.50-1.05

220-40

 JHJ547G

547

Low compressive strength, medium-soft formations with hard abrasive interlayers, such as hard shale, mudstone, soft limestone, sandstone, etc.

Large arc spoon-shaped inner row teeth, wedge-shaped outer row teeth, unequally spaced teeth

0.50-1.05

220-40

 JHJ617G

617

High compressive strength, medium-hard formations with hard and thick interlayers, such as limestone, hard shale, mudstone, sandstone, etc.

Large arc spoon-shaped inner row teeth, wedge-shaped outer row teeth, unequally spaced teeth

0.50-1.05

220-40

 JHJ627G

627

High compressive strength, medium-hard strata with hard interlayers, such as limestone, hard sandy mudstone, sandstone, etc.

Conical internal gear, spherical external gear

0.50-1.05

200-40

 JHJ637G

637

High compressive strength, abrasive medium-hard formations, such as limestone, dolomite, hard sandstone, etc.

Conical internal gear, spherical external gear

0.50-1.10

200-40

 JHJ737G

737

Hard formations with high abrasiveness, such as hard limestone, dolomite, hard sandstone, flint, etc.

Large arc spoon-shaped inner row of teeth, spherical outer row of teeth

0.50-1.20

200-40