Roller Cone Bit 10-1/2 Inch IADC 437 TCI Tri- Cone Bit API Oil Bit
1 . Descriptions:
Tungsten Carbide Insert (TCI) Tricone bits are used middle to hard
rock formation which offers a variety of carbide inserts such as
spherically shaped inserts for very hard rock or conically shaped
inserts for softer rock. The number of rows of inserts of Tricone
Bit is directly related to the type of application and the size of
hole to be drilled. Here are also open and sealed bearings
available as well as three types of shirttail protection to choose
from. TCI stands for Tungsten Carbide Insert.
2. Specification:
| BIT SPECIFICATIONS |
| Diameter: | 10-1/2 ”(266.7mm) |
| Body Type : | Steel Body |
| Tooth Type: | TCI Tooth |
| Bearing : | Sealed Rearing |
| API Thread API Connection: | 6-5/8 API REG |
| IACD CODE : | 527 |
| OPERATION PARAMETERS |
| Weight (Kg): | 86 KGS |
| RPM Range (rotary): | 140-50 |
| Weight on Bit(kN): | 89-267 kN |
| Make Up Torque ( KN): | 38 - 43 KN |
3 . Tricone Bit profile
4 . Tricone Bearing Types
There are primarily three types of bearing designs used in tricone
drilling bits:
• 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.
5. Question :
What we should be pay attention on choosing the tricone drill bit ?
- Tricone Bit IADC code passport
- Tricone Bit TCI & Steel tooth options
- Tricone Bit Additional tungsten carbide inserts on heel rows
- Tricone Bit Tungsten carbide coating on cone bodies
- Tricone Bit Diamond coated tungsten carbide inserts on the gauge of
the cones
- Tricone Bit Tungsten carbide inserts on the shirttail of the legs
- Tricone Bit Additional central nozzle for cleaning cones
The tricone Bit feature is that they come with their own passport
as below :
- 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
Which type of tricone you should choose ?
It 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.
