In the drilling process, the drill bit is the main tool to break the rock and the wellbore is formed by the drill bit breaking the rock. How well a wellbore is formed and the length of time it takes are not only related to the characteristics of the rock in the drilled formation and the performance of the drill bit itself, but also to the degree of mutual matching between the drill bit and the formation. Reasonable selection of drill bits plays an important role in increasing the drilling speed and reducing the overall cost of drilling. The drill bit is one of the important tools for oil drilling work. Whether the drill bit adapts to the rock properties and its quality plays a very important role in the selection of drilling technology, especially in terms of drilling quality, drilling speed and drilling cost.
| Basical Specification | |
| Size of Rock Bit | 4 5/8" |
| 118 mm | |
| Bit Type | Steel Tooth Tricone Bit/ Milled tooth Tricone Bit |
| Thread Connection | 2 7/8 API REG PIN |
| IADC Code | IADC 117 |
| Bearing Type | Journal Sealed Roller Bearing |
| Bearing Seal | Rubber Seal |
| Heel Protection | Anvailable |
| Shirttail Protection | Available |
| Circulation Type | Mud Circulation |
| Drilling Condition | Rotary drilling,high temp drilling,deep drilling,motor drilling |
| Nozzles | Central Jet Hole |
| Operating Parameters | |
| WOB (Weight On Bit) | 9,280-19,888lbs |
| 41.3-89KN | |
| RPM(r/min) | 60~180 |
| Formation | Very soft formations with low compressive strength and high drillability,such as clay,mudstone,chalk,etc. |
