Current availablity
Bit size
Inmm
4 1/8104.8
4 1/2114.3
4 5/8117.5
4 7/8123.8
5 1/2139.7
6 152.4
6 1/2165.1
7 1/2190.5
7 7/8200.0
8 1/2215.9
Recommended drilling parameters
IADCWOB(KN/mm)RPM(r/min)Applicable Formations
5270.3-0.7120-50Soft formation with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft shale, soft limestone, etc
5470.3-0.7100-50Soft to medium formation with low compressive strength, such as medium soft shale, medium soft limestone, medium soft sandstone, medium for formation with harder and abrasiver interbeds, etc.
6170.4-0.890-50
Medium hard formations with high compressive strength, such as hard shale, limestone, sandstone, dolomite, etc.
Recommended drilling parameters
IADCWOB(KN/mm)RPM(r/min)Applicable Formations
5270.3-0.7120-50Soft formation with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft shale, soft limestone, etc
5470.3-0.7100-50Soft to medium formation with low compressive strength, such as medium soft shale, medium soft limestone, medium soft sandstone, medium for formation with harder and abrasiver interbeds, etc.
6170.4-0.890-50
Medium hard formations with high compressive strength, such as hard shale, limestone, sandstone, dolomite, etc.
Cutting Structure
In response to the characteristics that inserts in different areas on the cone have different cutting actions, conical inserts are placed in permanent contact area and wedge inserts are placed in alternative contact area so that the drilling efficiency is greatly improved. Wear resistance of cutting structure is enhanced by setting diamond inserts in the permanent contact area of the cone where inserts are severely worn. Tungsten carbide inserts are placed on cone top face to protect cone body from abrasive erosion.
Gauge Structure
With active cutting gauge protection inserts on bit body, the bit has good gauge protection and updrill capability.
Bearing Structure
High precision journal bearing. Balls lock the cone. Hardfaced head bearing surface. Cone bearing inlaid with friction-reducing alloy. Abrasion resistance and seizure resistance of the bearing are improved. Compared with three cone bit, the leg bearing is bigger, so it can receive higher WOB and high reliability.
Hydraulic Design
Small angled watercourse design increased the shirttail thickness and can effectively prevent the watercourse erosion. Opitmized hydraulics structure improves the cleaning capability and increase ROP.
Product application
It is suitable for sidetracking, deep well drilling and old well repairing.
Packaging & Shipping
By plane, By train, By ship and so on
Our Services
Perfect after-sales service
Supply use and maintenance support
Welcome to visit our company and inquire any other question, We will answer your questions in detail
Company Information
Hejian Hengji Bit Manufacture Co., Ltd is established in 2012. It is located in hejian, hebei province. It is emerging enterprises in Chinese bit industry. It is mainly engaged in the development, production and sales of all kinds of bits.
It has developed and mass-produced products 3 to 26 inches series steel tooth bits and tricone bits, various types of PDC bits, core bits and production and processing assembly 0.6m to 3 m large diameter .
| IADC |
WOB(KN/mm) |
RPM(r/min) |
Applicable Formations |
| 417/427 |
0.3-0.9 |
150-70 |
very Soft formation with low compressive strength and high drillability,such as clay,soft mudstone,shale,salt,loose sands,etc. |
| 437/447 |
0.35-0.9 |
150-70 |
very Soft formation with low compressive strength and high drillability,such as clay,soft mudstone,shale,salt,loose sands,etc. |
| 515/525 |
0.35-0.9 |
180-60 |
very Soft formation with low compressive strength and high drillability,such as mudstone,salt,soft limestone, sands,etc. |
| 517/527 |
0.35-1.0 |
140-50 |
Soft formation with low compressive strength and high drillability,such as mudstone,salt,soft limestone,sands,etc |
| 535/545 |
0.35-1.0 |
150-60 |
medium soft with harder formation, more abrasive streaks,such as hard shale,mudstone,soft limestone,etc. |
| 537/547 |
0.4-1.0 |
120-40 |
medium soft with harder formation, more abrasive streaks,such as hard shale,mudstone,soft limestone,etc. |
| 617/627 |
0.45-1.1 |
90-50 |
medium hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc. |
| 637 |
0.5-1.2 |
80-40 |
hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc. |
| 737 |
0.7-1.2 |
70-40 |
Hard with high abrasiveness such as hard limestone,dolomite,firm sands,etc |
| 827/837 |
0.7-1.2 |
70-40 |
very hard with high abrasiveness,such as quartzite,quaruzite sand,chert,basalt,granite,etc. |
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