Suzhou Energy Tool Co., Ltd.
Suzhou Energy Tool Co., Ltd.
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Well Rock Drilling Tool 7-7/8 " Roller Cone Bit of Diamond Drilling Tool
1 . Descriptions:
Tungsten Carbide Insert (TCI) bits serve as indispensable tools for drilling operations in middle to hard rock formations, presenting a versatile range of carbide inserts meticulously designed to address the varying hardness levels of rock encountered during drilling endeavors. These inserts come in diverse shapes, including spherically shaped inserts tailored for exceptionally hard rock formations and conically shaped inserts optimized for softer rock materials.
The selection of carbide inserts plays a pivotal role in determining the efficiency and effectiveness of the drilling process, as different rock formations demand specific insert configurations to achieve optimal results. The number of rows of inserts featured on TCI bits is directly correlated with the nature of the application and the desired hole size, allowing for customizable configurations that cater to specific drilling requirements.
2. Specification:
| BIT SPECIFICATIONS | |
| Diameter: | 7-7/8" ”(200.00mm) |
| Body Type : | Steel Body |
| Tooth Type: | TCI Tooth |
| Bearing : | Sealed Rearing |
| API Thread API Connection: | 4-1/2 API REG |
| IACD CODE : | 537 |
| OPERATION PARAMETERS | |
| Weight (Kg): | 38 KGS |
| RPM Range (rotary): | 130-40 |
| Weight on Bit(kN): | 156- 327 kN |
| Make Up Torque ( KN): | 9.5- 12.2 KN |
3 . Tricone Bit profile
4 . 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 ?
The tricone feature is that they come with their own passport as below :
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.