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1、Summarize
Tri-cone Rock Bit has a widest variety of uses. Cutting teeth cut the bottom alternately. The rock breaking torsion and the contact area between teeth and bottom are small, while the specific pressure is high. This makes the bit easier to enter the stratum. The total working blade is long, which can reduce formation abrasion. Tri-cone Rock Bit is suitable for various formations from soft to hard.
2、Structural features
Insert bit is a tri-cone rock bit with sleeve or rolling bearing and jet design. It has the merit of optimized teeth placement, different teeth shape and height for different formations, well gauge protection, anti-attrition alloy on bearing system, silver plating, elaborate processing, anti-seizure, high strength and long working life. It is widely used in oil and gas exploitation and geological prospecting with a high drilling efficiency.
High strength and high tenacity carbide inserts are applied on the bit. The optimized teeth placement, height and shapes provide a well performance of high abrasion resistance and cutting capacity.
3、Recommended drilling parameters
Formation | Bit Type | Drilling Weight (KN/mm) | Rotary Speed (r/m) |
Very soft: such as soft marl, unconsolidated sand-stone, salt, etc. | 437 | 0.4-0.7 | 100-50 |
Soft strata with low compressive strength and high drill ability, such as shale, clay, sandstone, soft limestone, etc | 515 | 0.25-0.7 | 140-80 |
Soft strata with low compressive strength and high drill ability, such as shale, clay, sandstone, soft limestone, etc | 517 | 0.35-0.9 | 100-50 |
Low compressive strength, medium and soft, and relatively hard abrasive interlayer strata, such as hard shale, hard gypsum, soft limestone, sandstone, laminated dolomite, etc | 537 | 0.5-0.9 | 180-40 |
Formation with moderate hardness with high compressive strength ,Such as hard shale, limestone, sandstone, etc | 617 | 0.5-1.0 | 80-40 |
With hard abrasive streak,such as hard shale,anhydrite,soft lime-stone,dolomite,etc | 637 | 0.55-1.05 | 70-30 |
Note: The upper limits of drilling weight and rotary speed recommended in
4、Main Models
Bit size | Bit type | |
inch | mm | |
3 3/8 | 85.7 | GY537 |
3 7/8 | 98.4 | GY537 |
4 9/16 | 115.9 | GY437 |
4 5/8 | 117.5 | GY437、GY537 |
5 1/8 | 130.2 | GY537 |
5 1/4 | 133.4 | GY537 |
5 1/2 | 139.7 | GY537 |
5 5/8 | 142.9 | GY537、GY637 |
5 3/4 | 146.1 | GY537、GY637 |
5 7/8 | 149.2 | GY517 |
6 | 152.4 | GY537、GY617、GY637、GY737 |
6 1/8 | 155.6 | GY517 |
6 1/2 | 165.1 | GY547、GY637 |
7 1/2 | 190.5 | GY547 |
7 5/8 | 193.7 | GY537 |
7 7/8 | 200.0 | GY517、GY617、GY647 |
8 3/8 | 212.7 | GY517 |
8 1/2 | 215.9 | GY437、GY517、GY537、GY617、GY637 |
8 5/8 | 219.1 | GY617 |
8 3/4 | 222.3 | GY437、GY517、GY537、GY637 |
9 | 228.6 | GY537、GY637 |
9 1/2 | 241.3 | GY437、GY517、GY537、GY637 |
9 5/8 | 244.5 | GY537、GY617 |
9 3/4 | 247.7 | GY437 |
9 7/8 | 250.8 | GY437、GY517、GY537、GY617、GY637 |
10 5/8 | 269.9 | GY437、GY537、GY637 |
11 | 279.4 | GY617 |
11 5/8 | 295.3 | GY437、GY517、GY537 |
12 3/8 | 314.3 | GY517 |
12 1/4 | 311.2 | GY437、GY517、GY537、GY637 |
12 3/4 | 323.9 | GY537 |
13 1/8 | 333.4 | GY537 |
13 5/8 | 346.1 | GY517、GY537、GY617、GY637 |
13 3/4 | 349.3 | GY417、GY637 |
14 1/4 | 368.3 | GY537 |
14 3/4 | 374.7 | GY515、GY517、GY537 |
15 | 381.0 | GY515 |
15 1/2 | 393.7 | GY435、GY545、GY637 |
16 | 406.4 | GY435、GY515、GY617、GY637 |
17 1/2 | 444.5 | GY515、GY517、GY537、GY637 |
18 1/2 | 469.9 | GY537 |
20 | 508.0 | GY535 |
23 | 584.2 | GY435、GY515 |
26 | 660.4 | GY515 |
Additional features can be selected according to SY/T 5164-2016 table 2.
Jiangxi Feilong Rock Bit Manufacture Co., Ltd.
Service hotline：+86-795-3243041
Sales email：info@feilongbit.com
Address: #518, South Circle Road, Yichun City, Jiangxi Province,P.R.China
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