| 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.Drillers always drill a smaller hole at first, then enlarger it with hole opener, it is a type
of regular drilling technology when the drilling machine is lower power or the end-hole is too bit
2.We can make the hole opener and solutions according to the hardness of rocks, drilling depth,
size of pilot hole, size of end-hole
3.If fix the tricone bits as the pilot bits, the hole opener will be a rock bits, hole opener with tricone bits
as pilot bits is always applicable in special sizes well drilling
4.The reamer mainly consists of four or more cones
5.Cutting structure with premium tungsten carbide hard facing or premium tungsten carbide insert
of formulas and netechniques is utilized, and increases wear-resistant capability of reamer
6.The pilot is tricone bit
7.Seal and lubrication: High-performance HNBR O-ring for bearing seal and advanced grease for lubrication
8.Product applications: Suitable for the large size well, mining and infrastructure applications
9:Recommended drilling paramete Please kindly note that the size and number of cones are set according to
customer's requirements
2. Advantages of hole opener bits
Directional crossing operation is widely used in unexcavated project. Three steps in such operation are:
1, oriented hole operation; 2, hole opening; 3, pipe pulling.
Hole opening is the most onerous task in this operation, but, the key for hole opening operation is the hole opener
choosing according to the operation equipment and formation.
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