Increased Performance Hard Rock Drill Bits Drilling Through Soft To Ultrahard Formations
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Advantage:
- Suitable for soft to extremely hard and abrasive formations.
- High temperature heat treatment forged alloy steel.
- Specifically designed tungsten carbide insert.
- Advanced synthetic grease improves bearing lubrication and reliability.
- Sealed bearing can improves bearing life for longer drilling time and more footage drilled.
- Tungsten carbide pucks added on the shirttail to protect against abrasive applications.
- Thread protected to prevent it damaged during transportation.
What is Hard Rock Drill Bits
All bits the above are manufactured according to strict standards, set forth by the American Petroleum Institute (API).
And classified according to characteristics set forth by the International Association of Drilling Contractors (IADC).
Hard Rock Drill Bit is cut rock by Tungsten Carbide teeth projecting from rolling cutters, which rotate on the drill-bit bearings. Inturn, the drill bit rotates at a high rate, and presses against the bottom hole with a high axial force. The teeth of the rolling cutters roll over the bottom hole and, owing to the large stresses that develop in the area of contact between the teeth and the rock, cut the rock by crushing and chipping. As the hardness of therock increases, the rotation rate decreases and the axial force increases. Destroyed at the mine the rock is removed to the surface by air compressor, mud pump, or a combination of these methods.All bits the above are manufactured according to strict standards, set forth by the American Petroleum Institute (API). And classified according to characteristics set forth by the International Association of Drilling Contractors (IADC).
Working theory of TCI tricone bit
The medium formation TCI tricone bits features aggressive chisel tungsten carbide inserts on the heel rows and inner rows. This design provides a fast drilling rate and added cutting structure durability in medium to medium hard for mations. The HSN rubber O-ring provides adequate sealing for bearing durability.
Tricone bit is connected with the drill stem and rotates along with it, and drive cones to pressed on the rock. Each cone rotates round the axis of its leg and three cones simultaneously revolve around the bit center. The tungsten carbide inserts on the cone shell cause the formation to spall under the weight on bit and the impact load of cone rotating, the debris will be discharged out to hole by compression air.
The medium formation TCI tricone bits features aggressive chisel tungsten carbide inserts on the heel rows and inner rows. This design provides a fast drilling rate and added cutting structure durability in medium to medium hard for mations. The HSN rubber O-ring provides adequate sealing for bearing durability.
Common fault analysis of Tricone bits
| Common fault | Fault description | Method |
| Early wear of the shirttail | Abrasive formations, bent drill rod, seriously worn stabilizer and insufficient air for drilling rate attained etc, are all the causes which result in premature shirttail wear. In this case, the configuration of cones is good and the amount of inserts wear is small. Shairttail wear can also allow the big roller bearings to fall out resulting in bit failure. | The designer should strength the shirttail with certain measures to increase the wear-resistance capacity of shirttails. |
| Early wear and loose movement of the bearing | Excessive weight on bit, insufficent air to clean the hole and/or cool the bearing, leads to bearings overheating due to improper cooling and poor cuttings removal can shorten the service life of bit bearing. | Reduce bit pressure and increase air pressure |
| Cutting structure failure | Excessive WOB or Rotation speed; Wrong bit selection; Cuttings blowing in bad conditions caused repeating crushing. | Correctly select operating parameters and rotary types for specific working conditions |
Tianying's Best Service
1. 365×24 Year-round Service,We are committed to year-round 24-hour service even during holidays.
2. Provide professional technical services, including products introduction, selecting and problem solution etc.
3. Within 35 Working Days Quick Delivery.
Our Company
Hunan Tianying Drilling Machine Manufacturing Co., Ltd, supplies tricone drill bits, which are widely used in mining drill. Products offers a complete line of tricone bits, which using the best raw material in the market. Reliable steel, tungsten carbide, bearing and lubrication system, size from 7 7/8”(85.7mm) to 26”(660.4mm) for use in all formations, Our Tricone Bits are with Sealed Bearing, Roller Bearing and Gage Protected which can ensure you can drill more meters.
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Mines TCI Drill Bit , Roller Cone Drill Bit Through Soft - Ultrahard Formations Images
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