| 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 Functionality
1. Initially, drillers create a smaller pilot hole, followed by expansion using a hole opener, a standard drilling
technique especially beneficial when the drilling machine's power is limited or when dealing with significantly large end-holes.
2. Our expertise allows us to customize hole openers and solutions tailored to the specific hardness of rock formations,
desired drilling depth, and the dimensions of the pilot hole, as well as the targeted size of the end-hole.
3. When combined with tricone bits as pilot bits, the hole opener exhibits exceptional performance in special-sized
well drilling, ensuring efficiency and precision.
4. The reamer's robust design features four or more cones,
5. Enhanced cutting structures utilize premium tungsten carbide hard facing or inserts, which significantly increase
the wear resistance and longevity of the reamer, ensuring sustained operational excellence. techniques, ensuring sustained operational excellence.
6. The tricone bit serves as the trusted pilot,
7. Sealing and lubrication are optimized with high-performance HNBR O-rings for bearings and advanced grease,
8. Product applications: Ideal for large-size well projects, mining operations, and key infrastructure developments.
9: Recommended Drilling Parameters: The size and number of cones are customizable, set meticulously to meet
the unique specifications and requirements provided by our esteemed clients.
2. Advantages of Hole Opener Bits
Directional crossing operations, prevalent in unexcavated projects, involve three essential steps:
1. Oriented hole operation; 2. Hole opening; 3. Pipe pulling.
The hole opening phase is notably demanding in these operations, but selecting the right hole opener is
crucial, guided by the operational equipment and geological formations encountered.
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