| PRODUCT SPECIFICATION |
| IADC Code: 537 |
| Bearing Type: Sealed Bearing |
| Circulation Type: Mud |
| Pin Connection: 6 5/8″ API REG |
| Bit Diameter: 228.6mm (9 inch) |
| Weight: 63.56kgs |
| Applications: Medium-hard formations with high compressive
strength, such as hard shale, limestone, sandstone, dolomite, etc. |
Cutting structure
Using high-quality tungsten carbide new formula and new process,
special top wedge-shaped inserts can more effectively break rocks
and remove cuttings, so that drilling efficiency and life are
improved.
Gauge protection
The palm tip trimming teeth and palm back gauge protection teeth
protect the drill bit more effectively, making the wellbore more
regular and smooth, and extending the life of the drill bit.
Bearings
High-precision sliding bearings with two thrust surfaces, ball lock
mechanism, bearing surface inlaid with wear-resistant alloy and
silver-plated. It has strong wear resistance and is suitable for
high-speed rotation during drilling.
The roller cone bit should be performed as follows:
1. The roller cone drill bit is activated near the well's bottom,
and the pump's displacement is gradually increased to the required
level.
2. The roller cone drill bit progressively increases the drilling
pressure after cleaning the well's bottom for a brief time.
3. Because the pump pressure rises as the roller cone drill bit's
drilling pressure rises, the change in pressure and the value of
the roller cone bit's drilling pressure must be managed within the
technical specifications.
4. To avoid sticking, the roller cone drill bit must be spun
slowly.
5. Place one bit of a salvage cup before putting roller cone drill
bit in the well, verify roller cone bit outer diameter wear and
other wear and tear, measurement of the outside diameter and usage
of the previous one in good condition, then the diamond type can go
in. Check the damage to the cutting teeth, a blockage in the water
eye, the outer diameter of the roller cone bit, whether the
drilling fluid meets the design specifications, and whether the
purified products are operating normally.
6. The roller cone drill bit is turned on and off in the same way
as a regular turntable at work. Some parameters of the roller cone
drill bit, such as speed, drilling speed, drilling pressure, and so
on, as well as some conditions of the drill bit equipment and data
from the exploration equipment, can be used to represent the
drilling situation.
7. When the roller cone drill bit operates, the difference in rock
chips directly reflects several conditions, such as changes in the
formation at the well's bottom, roller cone bit wear, drill bit
working condition, and parameter appropriateness. Poor support of
the roller cone drill bit, drilling into a broken formation, or the
roller cone drill bit being covered with mud are the main causes of
unstable pump pressure.
