FOB Price
أحصل على آخر سعر2000 ~ 5000 / Piece ( Negotiable )
|Minimum Order
Place of Origin:
-
Price for Minimum Order:
Minimum Order Quantity:
1 Piece
Packaging Detail:
wooden box
Delivery Time:
within 5 work days
Supplying Ability:
50 Piece per Week
Payment Type:
T/T, L/C, Western Union
الشخص الذي يمكن الاتصال به zwbittwo
Zhoutou, Hebei
| Table of classification of formation hardness and bit selection | |||||
|
Roller cone
bit IADC code |
IADC code of diamond bit | Formation description | Rock type | Compressive strength(Mpa) | ROP(m/h) |
| **1/**4 | M/S**2~M/S**3 | Very soft:sticky soft formation with low compressive strength. |
Clay Siltstone sandstone |
<*5 |
>*0 |
| **6/**7 | M/S**2~M/S**3 | Soft:soft formation with low compressive strength and high drillability. |
Clay rock Marl Lignite sandstone |
*5~*0 |
*0~*0 |
|
**7/**7 |
M/S**3~M/S**3 |
Medium soft:soft to medium formation with low compressive strength and steak. |
Clay rock Marl Lignite Sandstone Siltstone Anhydrite Tuff |
*0~*5 |
5~*5 |
| **7/**7 | M**2~M**3 | Medium:medium to hard formation with high compressive strength and thin abrasive streak. |
Mudstone Dark rock shale |
*5~**0 | 2~6 |
| **7/**7 | M**2~M**4 |
Medium hard:hard and dense formation with high compressive strength and medium abrasiveness. |
Dark rock Hard shale Anhydrite Sandstone Dolomite |
**0~**0 | 1.5~3 |
| PDC bit shank thread and recommended make up torque | ||
| Bit size(in) | API regular pin(in) | Recommended up torque(KN.M) |
| 3 1/2~4 1/2 | 2 3/8 Reg | 2.4~2.7 |
| 4 *7/*2~5 | 2 7/8 Reg | 4.2~4.6 |
| 5 1/*2~7 7/8 | 3 1/2 Reg | 7.1~7.7 |
| 7 *3/*2~9 3/8 | 4 1/2 Reg | *7.0~*8.6 |
| 9 *3/*2~*4 1/2 | 6 5/8 Reg | *0.3~*7.5 |
| *4 9/*6~*8 1/2 | 7 5/8 Reg | *5.5~*1.9 |
