API Oil Water Well Mill Tooth Tricone Drill Bits Rock Bit For Hard Rock
Introduction
Ball locking cone. Hard faced bearing surface. The tapered bearing is embedded with antifriction alloy and then silver plated. Improved wear resistance and anti bite resistance of bearings, suitable for high rotational speeds. Ball lock cone, optimized tooth cone R groove size and steel ball tolerance gap, effectively preventing rock detachment
| Suitable Formation |
| IADC CODE | Rock Formation | WOB KN/mm | PRM(r/min) |
| 115 | Extremely soft formations with low compressive strength and high drillability, such as clay, mudstone, chalk. | 0.3~0.75 | 180~60 |
| 117 | Extremely soft formations with low compressive strength and high drillability, such as clay, mudstone, chalk. | 0.35~0.8 | 150~80 |
| 127 | Soft strata with low compressive strength and high drilla-bility, such as mudstone, gypsum, salt rock, soft shale, and soft limestone. | 0.35~0.9 | 150~70 |
| 217 | Soft to medium strata with low compressivestrength, such as medium soft shale, medium softlimestone, medium soft sandstone, and soft strata with hard intercalation. | 0.4~1.0 | 100~60 |
Operational principle
1) The speed of the drill bit is the speed of the rotary table or downhole power drilling tool. When the drill bit rotates, the cone also rotates around the axis of the drill bit. The linear velocity of each row of teeth on the cone rotating around the axis of the drill bit is different, and the linear velocity of the outer row of teeth is the highest.
2) The rotation of the drill bit is called rotation when the cone rotates counterclockwise around the tooth palm axis. The rotational speed of the cone is determined by the rotational speed of the drill bit and is related to the influence of the teeth on the bottom of the well.
3) The longitudinal vibration (axial vibration) of the drill bit impacts and changes the position of the breaking wheel center, causing the drill bit to reciprocate up and down along the axial direction. This is the longitudinal vibration of the drill bit, which is related to the structural parameters of the drill bit such as tooth height, tooth pitch, and lithology. The amplitude of soft formations is small, while that of hard formations is large. The vibration frequency is proportional to the number of teeth and cone speed.
4) The sliding shear fracture effect of a drill bit requires different types of rock to be broken, which is determined by the structural parameters of the drill bit. In soft formations, the slip of the drill bit is relatively large, while in hard formations, it should be as small or non slip as possible.
Used in
Tri-cone bit is a decelerating bit. It is based on the fact that the speed of the cone is less than the speed of the bit. It is suitable for sidetracking of old wells and deepening of small boreholes under high speed and high drilling pressure.
FAQ:
1. How to order the products?
A: Please send the inquiry with detail item description or with Model number.
2. How about the common packing?
A: If there is no special packing demand, we will take it as our normal packing. First in small carton, and then put in the bigger carton together to make sure goods completed.
3. Can I expect a quality products?
A: Yes. mature production technology ensuring the quality satisfy international request.
4. How to check the product are the exact one you want?
A: If possible, please attach one reference picture to avoid any misunderstanding or any links from our website for a better understanding.
5. How to control quality?
A: We have our own experienced QC team,there will be strict inspection and testing for each order before shipping out.
6. Fast delivery time:
A: Usually it takes 25 days for production.only 3 or 5 days if we have stock of your request size.
7. Competitive price:
A: Our factory can supply you the lowest price due to direct sale to customers without distributor!
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