Fast Drilling Rate Rotary Rock Bit , Rock Boring Drill Bits For Open Pit Mine

Advanced Cutting Structure designed Mining Drill Bits For Open Pit Mine

Click here for catalogueTCI DRILL BIT.pdf

We took the following factors into consideration when designing:

1. Journal Angle - Journal angle determines the overall aggressiveness of the bottom hole profile. Soft formation rock bits employ a 33 degree angle while hard formation rock bits employ a 36 degree angle.
2. Cone Offset - Increased rate of penetration (ROP) can be achieved by offsetting the ceter line of the cone away from the center of bit rotation. This produces more on-bottom action. The higher the offset the greater the scraping and gouging action on bottom.
3. Cone Angle –Oversize angle controls the diameter of the cone at gage.

Soft to medium formation tricones employ a more round cone profile and a larger cone angle. This creates a bottom hole action of gouging and scraping.

Hard formation bits employ a smaller cone angle and a flatter cone profile. This creates a bottom hole action of crushing.

1. Oversize Angle - Oversize angle controls the diameter of the cone at gage.

Soft formation tricones employ a higher oversize angle; thus, escalating gage action and cone diameter.

Hard formation bits have very little or no oversize angle. This reduces the action on gage and also reaming of gage inserts.

1. Intermesh - Intermesh is the distance the top of a tooth or button bit insert extends into the grooves of adjacent cones. This spacing allows for cleaning of formation and prevents packing.
2. Projection and Pitch - Projection is the height of the button or tooth. Pitch is the space between teeth or inserts.

The soft formation TCI tricone bits are used to drill low compressive strength, very soft formations. This bit maximized to use of both conical and chisel tungsten carbide inserts of large diameters and high projection. This cutting structure design, combined with maximum cone offset, results in high bit penetration rates. The deep intermesh of cutter rows prevents bit bailing in sticky formations.

What is Mining Drill Bits?

Mining Drill Bit is an ideal solution for soft, medium, or hard rock formations, it is connected with the drill stem and rotates along with it, and drive cones to pressed on the rock. Each cone rotates round the axis of its leg and three cones simultaneously revolve around the bit center. The tungsten carbide inserts on the cone shell cause the formation to spall under the weight on bit and the impact load of cone rotating, the debris will be discharged out to hole by compression air. Tricone bits come in several different varieties, and can deal with a wide range of different rock formations. It is important to know the type of formation you are drilling in when selecting a drill bit.

CUTTING SELECTION GUIDE

Advantage:

1. Optimized cutting structure and bearing geometry to distribute load .
2. More uniformly distributed load over bearings.
3. Smoother bit performance .
4. Sustained penetration rate over longer periods of time .
5. Reduced risk of bearing failure .
6. Streamlined lug manages.
7. larger drill cuttings.
8. Higher penetration rate Less regrinding of cuttings to smaller pieces.
9. Less bit wear.
10. Full body armor minimizes wear on bit body and shirttail.

Main Products We Provide

We mainly provide Tricone Bits(TCI Drill Bits) for open pit mining.

a). Type: Tungsten Carbide Insert (TCI)

b). Formation Application: Soft to Hard Formation

c). Size Available: 7 7/8''~26''

d). Popular IADC Code: IADC545,645,725,735,745,825,835