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Hunan Tianying Drilling Machine Manufacturing Co., Ltd. Tricone Drill Bit
7 Years
| Ask Lasest Price | |
| Brand Name : | Tianying |
| Model Number : | 12 1/4" IADC635 |
| Certification : | ISO9001 |
| Price : | Negotiable |
| Payment Terms : | L/C, T/T |
| Supply Ability : | 1000 pcs per Month |
| Delivery Time : | 15-35 working days |
Special Sizes Can Be Customized Hard Rock Drill Bits For Rock
Crushing
Click here for catalogueTCI DRILL BIT.pdf
What is Hard Rock Drill Bits
Hard Rock Drill Bit - a drilling method that uses a roller bits. In roller-bit drilling,
rock is cut by hard-alloy 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).
How to read an IADC Code properly
| First Digit | TOOTH |
| 1 | Steel tooth bits for Soft Formation |
| 2 | Steel tooth bits for Medium Formation |
| 3 | Steel tooth bits for Hard Formation |
| 4 | TUNGSTEN CARBIDE INSERT BITS For varying formation hardness with 4 being the softest and 8 the hardest. |
| 5 | |
| 6 | |
| 7 | |
| 8 | |
| Second Digit | FORMATION |
| 1 | 1,2,3 and 4 are further breakdown of formation with 1 being the softest and 4 the hardest. |
| 2 | |
| 3 | |
| 4 | |
| Third Digit | BEARING/SEAL TYPE |
| 1 | Standard open bearing roller bit |
| 2 | Standard open bearing roller bit, air-cooled |
| 3 | Standard open bearing roller bit with gauge protection |
| 4 | Sealed roller bearing bit |
| 5 | Sealed roller bearing bit with gauge protection |
| 6 | Journal sealed bearing bit |
| 7 | Journal sealed bearing bit with gauge protection |
| Fourth Digit | ADDITIONAL FEATURES |
| A | Air application |
| R | Reinforced welds |
| C | Center jet |
| S | Standard steel tooth |
| D | Deviation control |
| X | Chisel insert |
| E | Extended jet |
| Y | Conical Insert |
| G | Extra gage protection |
| Z | Other insert shape |
| J | Jet Deflection |
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 |
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.
Advantage:
1. Strictly select the material to ensure the reliable quality. Bad
steel and tungsten carbide inserts won't be used.
2. Strictly act according to the ISO9001 standard, and control by
full-scale inspection.
3. Sales and support people are highly trained in the latest rock
drilling technology and can offer you expert advice on what
products will best fit a specific end use application.
Tianying's Best Service
1. 365×24 Year-round Service,We are committed to year-round 24-hour
service even during holidays.
1. 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.
Tianying's Best Service
1. 365×24 Year-round Service,We are committed to year-round 24-hour
service even during holidays.
1. Provide professional technical services, including products
introduction, selecting and problem solution etc.
3. Within 35 Working Days Quick Delivery.
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