1.Cutting Structure of this type sealed and non-sealed three cone bits : The wear-resistance of teeth is enhanced with premium tungsten carbide hard facing on the tooth surfaces for steel tooth bit. 2.Gauge Structure of this type three cone rock bits : Multiple gauge protection with gauge trimmers on the heel and gauge inserts on the gauge surface of the cone, tungsten carbide inserts and hard facing on the shirttail increases gauge holding capability and bearing life. 3.Bearing Structure of this type three cone rock bits : High precision roller bearing with two thrust faces. Ball lock the cone.Thrust faces hard face with wear resistant alloy. Abrasion resistance and seizure resistance of the bearing are improved 
Table of classification of formation hardness and bit selection | Roller cone bit | IADC code of diamond bit | Formation description | Rock type | Compressive strength (Mpa) | ROP(m/h) |
| IADC code | |||||
| 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 |
Steel Tooth Tricone Bits Size | Regular Sizes | Regular IADC | API Reg Pin | Make-up Torque(N.m) |
| 3 7/8"(98.4mm) | 126/216/637 | 2 3/8 | 4100~4700 |
| 4 5/8"(117.4mm) | 126/216/517/537/637 | 2 7/8 | 6100~7500 |
| 5 1/4"(133.3mm) | 126/216/517/537/637 | 3 1/2 | 9500~12200 |
| 5 5/8"(142.8mm) | 126/216/517/537/637 | 3 1/2 | 9500~12200 |
| 5 7/8"(149.2mm) | 126/216/517/537/637 | 3 1/2 | 9500~12200 |
| 6"(152.4mm) | 126/127/216/517/537/617/637 | 3 1/2 | 9500~12200 |
| 6 1/4"(158.7mm) | 126/127/216/517/537/617/637 | 3 1/2 | 9500~12200 |
| 6 1/2"(165mm) | 126/127/216/517/537/617/637 | 3 1/2 | 9500~12200 |
| 7 1/2"(190mm) | 126/216/517/537 | 4 1/2 | 16300~21700 |
| 7 5/8"(193mm) | 126/216/517/537 | 4 1/2 | 16300~21700 |
| 7 7/8"(200mm) | 126/216/517/537 | 4 1/2 | 16300~21700 |
| 8 1/2"(215.9mm) | 117/127/217/437/517/537/617/637 | 4 1/2 | 16300~21700 |
| 9 1/2"(241.3mm) | 117/127/217/437/517/537/617/637 | 6 5/8 | 38000~43400 |
| 9 7/8"(250.8mm) | 117/127/217/437/517/537/617/637 | 6 5/8 | 38000~43400 |
| 10 5/8(269.8mm) | 117/127/137/217/517/537/617/637 | 6 5/8 | 38000~43400 |
| 11 5/8(295.3mm) | 117/127/137/217/517/537/617/637 | 6 5/8 | 38000~43400 |
| 12 1/4"(311.1mm) | 114/127/217/437/517/537/617/637 | 6 5/8 | 38000~43400 |
| 13 5/8"(346.0mm) | 127/217/517/537/617/637 | 6 5/8 | 38000~43400 |
| 14 3/4"(374.6mm) | 127/217/517/537/617/637 | 7 5/8 | 46100~54200 |
| 17 1/2"(444.5mm) | 114/115/125/215/515/535/615/635 | 7 5/8 | 46100~54200 |
| 26"(660.4mm) | 114/115/125/215/515/535/615 | 7 5/8 | 46100~54200 |
| Minimum Order Quantity | N/A |
| Price | |
| Packaging Details | Standard Export Delivery Package |
| Delivery Time | 7days |
| Payment Terms | T/T |
| Supply Ability | Based on Detailed Order |
