TCI tricone bit, full name Tungsten Carbide Insert Tricone Bit.
It is one main type of rotary tricone drill bit. Hard tungsten carbide inserts are pressed into pre-machined holes on three cones. While drilling, the carbide inserts impact, crush and shear rock formations.
IADC 837 is a heavy-duty TCI (Tungsten Carbide Insert) tricone bit.
It adopts dense spherical tungsten carbide inserts pressed into cones. Under weight-on-bit and rotation, inserts continuously impact, crush hard rock. Equipped with sealed journal bearing system for long service life under high WOB.
Manufactured strictly in accordance with API Spec 7-1, standard API REG thread connections.
Spherical tungsten carbide inserts
Short, densely arranged spherical buttons, strong anti-chipping performance, resist heavy impact and abrasion.
Sealed journal bearing
Pressure-balanced seal system, stable lubrication, suitable for high weight-on-bit drilling.
Enhanced gauge protection
Extra gauge inserts & shirttail hardfacing, maintain hole diameter and prevent undergauge.
Optimized hydraulic design
Multi-nozzle configuration to clean cuttings efficiently and cool cones.
Wide size availability
Covers common sizes: 6", 6½", 7⅞", 8½", 9⅝", 9⅞", 12¼",14 3/4'' ,15 1/2'', 16 1/2'', 17 1/2'', 20'' ,22'' etc.
Application Industries
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Oil & Gas Drilling Drilling of intermediate and target sections in onshore and offshore oil/gas wells; directional well and horizontal well drilling through hard bedrock; deep exploration wells.
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Geothermal & Deep Water Well Drilling Deep water wells, geothermal heating wells, boreholes passing through hard bedrock strata.
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Mining Engineering Open-pit mine blast hole drilling; underground mineral exploration drilling; ore body delineation.
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Construction Foundation Drilling Bridge and building pile foundation drilling; anchor bolt holes for slope reinforcement; engineering geological investigation boreholes.
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Geological Prospecting Regional geological survey, mineral resource exploration drilling projects.
Suitable Formations
Medium-hard, hard and strongly abrasive rock: Hard sandstone, limestone, dolomite, granite, basalt, quartzite, conglomerate, chert and metamorphic rock.
Brief Comparison: Steel Tooth VS TCI Tricone Bit
| Item | Steel Tooth (Milled Tooth) | TCI Tricone Bit |
| Cutting part | Teeth milled from cone body | Pressed tungsten carbide inserts |
| Dominant action | Scraping & shearing | Impact crushing |
| Best strata | Soft ~ medium, low abrasion | Medium-hard ~ hard, abrasive rock |
| ROP | Higher in soft plastic formations | Lower in soft strata |
| Unit cost | Lower | Higher |
