Mining drilling Tool 12-1/4 Inch IADC 516 with Reg 7-5/8 API
A tricone bit is an essential component of the bottom hole assembly
used in drilling operations. This mechanical drill bit utilizes
rotational motion and the mechanical friction generated by its
teeth to remove the rock surface during drilling. Its purpose is to
harness the energy from the rotating drill string and the mud
supply, effectively applying this force to facilitate well
|Product name||12 1/4 inch ,TCI Tricone Bit|
|Size||12 1/4 inch, .3111mm|
|Tooth type||TCI / Tungsten Carbide Insert|
|Connection||6- 5/8" API Reg|
|Bearing||Rubber Sealed Roller Bearing|
|Nozzle||Three Jet Nozzles & Center Jet|
|Application||Water Well ,Oil Well ,HDD,Exploration ,etc|
|RECOMMENDED ROCK FORMATION|
|For hard to very hard rock with high compressive strength and high
abrasiveness,such as limestone,dolomite,sandstone and chert,etc.|
|RECOMMENDED DRILLING PARAMETERS FOR APPLICATION |
How the know a triconequality ?
- IADC code passport
- TCI & Steel tooth options
- Additional tungsten carbide inserts on heel rows
- Tungsten carbide coating on cone bodies
- Diamond coated tungsten carbide inserts on the gauge of the cones
- Tungsten carbide inserts on the shirttail of the legs
- Additional central nozzle for cleaning cones
The tricone feature is that they come with their own passport as
- The specification of the cones
- The quality stamp signed by the person who made and checked the bit
- The recommended drilling parameters to get the best performance out
of the bit:
- Bit weight
- Rotation speed
- Flushing volume
- Geotechnical investigation
- Mining exploration & Probing
- Geotechnical instrumentation
Which type of tricone you choose depends on the geology you are
drilling in and the diameters of the borehole you are drilling. The
International Association of Drilling Contractors (IADC) have
developed an easy use step system to choose the right tricone for
your geology with additional features such as bit protection for
longer production life.
|Tungsten carbide Inserts|
|Chisel||High Penetration for Plastic Rock||Plastic Rock soft& Medium Hard|
|Conical||Same as chisel plus high breaking and Rotation Resistance||Fragile Rocks medium to hard|
|Ball||Very High Breaking Resistance||Fragile Rocks medium to hard|
There are primarily three types of bearing designs used in tricone
• STANDARD OPEN BEARING ROLLER BIT:
On these bits the cones will spin freely. This type of bit has a
front row of ball bearings and a back row of roller bearings.
• SEALED BEARING ROLLERS BITS
These bits have an O-Ring seal with a grease reservoir for bearing
cooling. The seals acts as a barrier against mud and cuttings to
protect the bearings
• JOURNAL BEARING ROLLER BITS
These bits are strictly oil/grease cooled with nose bearings,
O-Ring seal and a race for maximum performance.
IADC Codes make it easier to describe what kind of rock bit is
The first three digits classify the bit according to the formation
it is designed to drill and the bearing/seal design used.
1, 2, and 3 designate STEEL TOOTH BITS with 1 for soft, 2 for medium and 3 for hard formations.
Codes 4, 5, 6, 7 and 8 designate TUNGSTEN CARBIDE INSERT BITS for varying formation hardness with 4 being the softest and 8 the
The following shows the typical formation and its IADC reference
1 & 4 Soft formations with sticky layers and low compressive
strength, such as clay, marls.
1 & 4 Soft formations with low compressive strength such as
marl, salt, anhydrite and shale.
5 Soft to medium formations with low compressive strength and
inter-bedded with hard layers, such as sands, shale and chalk.
2 or 6 Medium to hard dense formations with high to very high
compressive strength, but with non-abrasive or small abrasive
layers, such as shales, mudstone, sandstone, limestone, dolomite
3 or 7 Hard and dense formations with very high compressive
strength and some abrasive layers, such as siltstone, sandstone and
8 Extremely hard and abrasive formations such as quartzite and
IADC Codes - Digits The first three digits classify the bit according to the
formation it is designed to drill and the bearing/seal design used.
First Digit 1, 2, and 3 designate STEEL TOOTH BITS with 1 for soft, 2 for medium and 3 for hard formations.
4, 5, 6, 7 and 8 designate TUNGSTEN CARBIDE INSERT BITS for varying formation hardness with 4 being the
softest and 8 the hardest.
Second Digit 1, 2, 3 and 4 are further breakdown of formation with 1 being the softest and 4 the hardest.
Third Digit This digit will classify the bit according to bearing/ seal type as follows:
Standard open bearing roller bit Standard open bearing roller bit,
air-cooled Standard open bearing roller bit with gauge protection
which is defined as carbide inserts in the heel of the cone Sealed
roller bearing bit Sealed roller bearing bit with gauge protection
Journal sealed bearing bit Journal sealed bearing bit with gauge
Fourth Digit The following letter codes are used in the fourth digit position
to indicate additional features: A. Air Application R. Reinforced Welds C. Centre 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.