Wholesale API oil button drilling bits in stock with discounted price from China factory Far Eastern Drilling can produce TCI tricone bits and steel teeth tricone bits.Steel tooth tricone bit also call milled tooth tricone bit.The bit size rang is from 3" to 26". We can supply most of IADC Codes. Drilling project is an important link of exloration and developemnt of petroleum and natual gas. We will try our best to improve the bit quality to extend the bit life.| Basical Specification | |
| Size of Rock Bit | 8 1/2 inches |
| 215.90 mm | |
| Bit Type | Steel Teeth Tricone Bit |
| Thread Connection | 4 1/2 API REG PIN |
| IADC Code | IADC135 |
| Bearing Type | Journal Bearing |
| Bearing Seal | Elastomer sealed or Rubber sealed |
| Heel Protection | Available |
| Shirttail Protection | Available |
| Circulation Type | Mud Circulation |
| Drilling Condition | Rotary drilling,high temp drilling,deep drilling,motor drilling |
| Total Teeth Count | 83 |
| Gage Row Teeth Count | 35 |
| Number of Gage Rows | 3 |
| Number of Inner Rows | 5 |
| Jounal Angle | 33° |
| Offset | 8 |
| Operating Parameters | |
| WOB (Weight On Bit) | 9,662-33,930 lbs |
| 43-151KN | |
| RPM(r/min) | 300~60 |
| Recommended upper torque | 16.3KN.M-21.7KN.M |
| Formation | Soft formation of low crushing resistance and high drillability. |
8 1/2 is the most regular sizes in oil well rock drilling fields.It is working well with small capacity drilling rigs and widely used in the world.To choose the correct model is important during the drilling project. In drilling project, Far Eastern have 15 years and more than 30 countries services experience to supply the drill bits and advanced drilling soulutions for many different applications. The application including oil field,natural gas,geological exploration,driectional boring,water well drilling ,The various drill bits can be customized as per different rock formation becasue we have our own API & ISO certified factory of tricone drill bits. We can give our engineer's solution when you can supply specific conditions, such as hardness of rocks,types of drilling rig,rotary speed,weight on bit and torque. 
