Rock Well Bit 8-1/2" Tricone Drilling Bit Of Drilling Equipment
1 . Descriptions:
Tungsten Carbide Insert (TCI) bits are 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 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. Tricone Specification:
| Roller Cone SPECIFICATIONS |
| Diameter: | 8.5 ”(215.9mm) |
| Body Type : | Steel Body |
| Tooth Type: | TCI Tooth |
| Bearing : | Sealed Rearing |
| API Thread API Connection: | 4-1/2 API REG |
| IACD CODE : | 637 |
| OPERATION PARAMETERS |
| Weight (Kg): | 42 KGS |
| RPM Range (rotary): | 90-40 |
| Weight on Bit(kN): | 151-259 kN |
| Make Up Torque ( KN): | 16 - 22 KN |
3 . Roller Cone Bit Profile
The Tricone Bit is composed by Tricone bits consist of three
rotating cones that have teeth made of a hard material, usually
steel, tungsten carbide, or diamond.
These teeth crush the rock as the cones rotate, and the rock debris
is then cleared away by the drilling fluid
4. What we should be pay attention on choosing the tricone drill bit ?
- 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
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.
5. Roller Cone Application Area
