Henan Duke Machinery Equipment Co., Ltd.
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| Product name | API 7 7/8" IADC517 Tricone drill Bit for water well and oil well |
| Size | 7 7/8"(200mm) |
| type | HJ517 |
| Bearing type | rubber sealed bearing |
| thread | 4 1/2" API Reg pin |
| Gauge protection | gauge protection |
| WOB(KN/mm) | 0.35-1.05 |
| RPM(r/min) | 120-50 |
| Application formation | soft with low compressive strength and high drillability,such as shale,clay,sandstone and softlimestone,etc |
| Weight | 38kg |
| Industrial standard | SY/T5164 |
| MOQ | 1 |
| 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) |
| 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 |