| Customization: | Available |
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| Customized: | Customized |
| Standard: | API |
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Roller cone bit IADC code |
IADC code of diamond bit |
Formation description |
Rock type |
Compressive strength(Mpa) |
ROP(m/h) |
|
111/124 |
M/S112~M/S223 |
Very soft:sticky soft formation with low compressive strength. |
Clay Siltstone sandstone |
<25 |
>20 |
|
116/137 |
M/S222~M/S323 |
Soft:soft formation with low compressive strength and high drillability. |
Clay rock Marl Lignite sandstone |
25~50 |
10~20 |
|
417/527 |
M/S323~M/S433 |
Medium soft:soft to medium formation with low compressive strength and steak. |
Clay rock Marl Lignite Sandstone Siltstone Anhydrite Tuff |
50~75 |
5~15 |
|
517/537 |
M322~M443 |
Medium:medium to hard formation with high compressive strength and thin abrasive streak. |
Mudstone Dark rock shale |
75~100 |
2~6 |
|
537/617 |
M422~M444 |
Medium hard:hard and dense formation with high compressive strength and medium abrasiveness. |
Dark rock Hard shale Anhydrite Sandstone Dolomite |
100~200 |
1.5~3 |
1. Hole Opener
1. Initially, drillers create a smaller hole, subsequently expanding it using a hole opener. This technique is a
part of standard drilling procedures, particularly when dealing with lower-powered drilling machines or when
2. We offer customizable hole openers and solutions tailored to the rock hardness, drilling depth,
pilot hole size, and final hole size.
3. By integrating tricone bits as pilot bits, the hole opener evolves into a rock bit. This combination of hole openers with
tricone bits as pilot bits is especially effective for drilling wells of unique dimensions.
4. The reamer is ingeniously designed to feature four or more cones,
5. Its cutting structure is fortified with top-tier tungsten carbide hard facing or precision tungsten carbide inserts,
crafted from exclusive formulas and techniques to significantly enhance the wear-resistance of the reamer.
6. The pilot bit employed is a robust tricone bit,
7. Seal and Lubrication: Equipped with a high-performance HNBR O-ring for reliable bearing sealing, complemented by advanced lubrication.
8. Product Applications: Ideally suited for large-scale well drilling, mining endeavors, and infrastructure projects.
9: Recommended Drilling Parameters: Please be aware that the cone size and quantity are customized to
meet specific customer requirements.
2. Advantages of Hole Opener Bits
Directional Crossing Operations are pivotal in construction projects without excavation. These operations encompass three phases:
1. Oriented Hole Operation; 2. Hole Opening; 3. Pipe Pulling.
The hole opening phase is the most challenging aspect of this process, and selecting the proper hole opener is crucial,
dictated by the specific operation equipment and geological formation.
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