12 inch 311mm IADC537 tricone bit
1) Steel tooth roller bit， size 3 inch-26 inch， IADC 517/537/617/637 is suitable for soil, mudstone, gypsum, rock salt, chalk, soft lime，soft shale，with hard interlayer below 40 MPa Soft formation. 2)Bearing: rubber seal， compound seal， metal seal. The bearing seal structure can be selected from rubber seal, composite seal and metal seal bearing. The service life of the bearing is different. For different working conditions， the product can be reasonably matched with the working conditions， the product can be reasonably matched with the customer to effectively control the cost of drilling
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- Description
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1) Steel tooth roller bit， size 3 inch-26 inch， IADC 517/537/617/637 is suitable for soil, mudstone, gypsum, rock salt, chalk, soft lime，soft shale，with hard interlayer below 40 MPa Soft formation.
2)Bearing: rubber seal， compound seal， metal seal. The bearing seal structure can be selected from rubber seal, composite seal and metal seal bearing. The service life of the bearing is different. For different working conditions， the product can be reasonably matched with the working conditions， the product can be reasonably matched with the customer to effectively control the cost of drilling
IADC
Recommended parameter Applicable stratum
Weight on bit
（KN/mm）
Rotational speed
（r/min）
116 117
0.350.8
15080
Extremely soft formations with low compressive strength and high drillability, such as clay, mudstone, chalk 126 127
0.350.9
15070
Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt rock, soft shale, and soft limestone 136 137
0.351.0
12060
Soft to medium-soft formations with low compressive strength and high drillability, such as medium-soft shales, anhydrite, medium-soft limestone, medium-soft sandstone, and soft formations with hard interlayers 216 217
0.41.0
10060
Medium strata with high compressive strength, such as medium soft shale, anhydrite, medium soft limestone, medium soft sandstone, and soft strata with hard interlayers 246 247
0.41.0
8050
Medium-hard formations with high compressive strength, such as abrasive shales, limestone, sandstone, dolomite and anhydrite, marble 417 437 447
0.350.9
15070
Extremely soft formations with low compressive strength and high drillability, such as clay, mudstone, chalk, mudstone, gypsum, salt rock, soft shale, soft limestone 517 527
0.351.0
14060
Soft strata with low compressive strength, such as mudstone, gypsum, salt rock, soft shale, soft limestone 537 547
0.451.0
12050
Soft to medium formations with low compressive strength, such as medium soft shales, medium soft limestone, medium soft sandstones, and medium formations with hard abrasive interlayers 617 627
0.451.1
9050
Medium-hard strata of high compressive strength, such as hard shale, limestone, sandstone, dolomite 637
0.51.2
8040
Hard strata of high compressive strength, such as sandstone, limestone, dolomite and anhydrite, marble Keywords：- 镶齿牙轮钻头
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