Tricone mining bits
– **Sizes:** Available in sizes ranging from 3 7/8’’ to 36’’.
– **Application:** Suitable for a variety of drilling projects including oil, natural gas, geothermal, water well drilling, and HDD projects.
– **Cutting structure:** Utilizes high-quality tungsten carbide inserts and a widened crest insert for improved aggressivity and penetration rate.
– **Gauge protection structure:** Features multiple heel positions with gauge trimmer, tungsten carbide, and hardfacing for enhanced gauge protection.
– **Bearing structure:** Equipped with high precision journal bearings, ball locked cone, and friction-reducing alloy for improved abrasion resistance and seizure resistance, suitable for high rotary speed.
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IADC
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WOB(kN/mm)
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RPM (r/min)
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Suitable formation
|
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417
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0.35~0.90
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140~70
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Very soft with low compressive strength and high drillability,such as shale,clay,sandstone and conglomerate,etc.
|
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437
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0.35~0.95
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140~60
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Very soft with low compressive strength and high drillability,such as shale,clay,sandstone and conglomerate,etc.
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517
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0.35~1.05
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120~50
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Soft with low compressive strength and high drillability,such as shale,clay,sandstone and soft limestone,etc.
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537
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0.35~1.05
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110~40
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Medium soft with low compressive strength and harder abrasive stringers,such as hard shale,hard gypsolyte,soft limestone,sandstone
and dolomite with stringers,etc. |
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617
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0.35~1.05
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80~40
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Medium hard with high compressive strength and thick&hard stringers,such as hard shale,limestone, sandstone and dolomite,etc.
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637
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0.70~1.20
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70~40
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Medium hard with high compressive strength and high abrasiveness,such as limestone,dolomite, sandstone and chert.ect.
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Note:The upper limits of WOB and RPM in above table should not be used simultaneously.
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