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The 22'' IADC 537G TCI Tricone Bit from HJ-Bits caters to enterprise customers drilling soft to medium-hard formations. Equipped with staggered tungsten carbide inserts and a sealed self-lubricating bearing system, it cuts efficiently in clay, siltstone, and sandstone. The concave bit face minimizes cuttings balling, and ISO 9001 certification guarantees consistent quality for shallow gas, water well, and offshore foundation projects.
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The 22 inch (558.8mm) IADC 537G TCI tricone bit is designed for drilling operations in soft to medium-hard formations. This drill bit features three ductile iron cones with staggered tungsten carbide inserts measuring 10mm in height. The design incorporates a sealed roller bearing system with double-row ball bearings, capable of handling weight on bit up to 500kN and rotational speeds up to 200 RPM.
The bit's 20-degree cone angle and 8-blade configuration enhance cutting efficiency in clay, siltstone, and low unconfined compressive strength (UCS) sandstone. Its concave bit face design reduces cuttings balling in sticky formations, supported by nozzles that facilitate high-volume mud flow. This tricone bit complies with IADC 537G specifications for general-purpose drilling applications.
Parameter | Value |
Bit Size | 22 inch, 558.8mm |
IADC Code | 537 |
Series | HR |
Tooth Type | TCI/tungsten carbide insert |
Connection | 7 5/8 API REG PIN |
Bearing Type | Rubber sealed bearing |
Nozzle Configuration | Three jet nozzles |
Rotary Speed Range | 50-120 rpm |
Weight on Bit Range | 0.45-1.0 kN/mm |
Primary Applications | Water well, oil well, HDD, exploration |
Suitable Formations | Soft to medium formations with low compressive strength, including medium soft shale, medium soft limestone, and medium soft sandstone |
 PDC 3 7/8'' |  PDC 4 5/8'' |  PDC 4 3/4'' |  PDC 5 1/2'' |
 Tricone 5 7/8''537 |  Tricone 14 3/4'' 117 |  Tricone 12 1/4'' 537 |  Tricone 10 5/8'' 537 |
 Tricone 20'' 637 |  Tricone 15 1/2'' 517 |  Tricone 14 3/4'' 637 |  Tricone 12 1/4'' 637 |
 Tricone 12 1/4'' 437 |  Tricone 8 3/4'' 617 |  Tricone 12 1/4'' 537 |  Tricone 9 7/8'' 517 |
 Drag bit 9 7/8'' |  Drag bit 15'' |  Drag bit 8 1/2'' |  Drag bit 7 1/2'' |
 Tricone 22''517 |  Tricone 20'' 127 |  Tricone 17 1/2'' 217 |  Tricone 17 1/2'' 637 |
 Hole opener 18'' |  Hole opener 14'' |  Hole opener 16'' |  Hole opener 12 1/4'' |
The conical teeth feature a 15-degree tip angle that maximizes chip formation in unconsolidated clays with UCS less than 50MPa. Field testing has recorded rates of penetration up to 40 meters per hour in Mississippi Lime formations. The staggered tooth spacing of 15mm minimizes regrinding requirements, with field data showing 30% longer tooth life in silty sandstone.
The bearing system uses polyurethane seals with fabric reinforcement that resist swelling in oil-based mud with high aromatic content, passing the 100-hour immersion test according to ASTM D471 standards. Self-lubricating journal bearings made from graphite-impregnated bronze require no pre-drilling maintenance, reducing rig floor preparation time by 30 minutes. A 0.15mm bearing clearance accommodates thermal expansion in wells with temperatures up to 150°C, preventing seize-up during tripping operations.
Gauge pads feature 5mm-deep helical grooves that disrupt mud cake formation, reducing differential sticking incidents by 40% in shale intervals. The concave bit face with a 1.2m radius improves cuttings flow velocity by 20% at the bit face, as measured by high-speed photography in laboratory tests. Optional nozzle configurations are available, including jet nozzles in 16mm, 18mm, and 20mm sizes, and impact nozzles in 12mm and 14mm sizes, allowing customization for different mud types and flow rates.
This tricone bit is suitable for multiple industrial drilling applications. It performs well in shallow gas well drilling in alluvial plains with high clay content, such as the Texas Gulf Coast region. The bit is also used for water well construction in loose Quaternary sediments where 1% diameter tolerance is required. Additional applications include foundation drilling for offshore platforms in sandy seabeds with high tidal currents, and coalbed methane extraction in soft coal formations with Vickers hardness less than 50HV.
All tricone bits undergo a 20-stage inspection process, including dye penetrant testing for cracks, torque testing ranging from 500-1000 ft-lb, and rotational balance checks. The manufacturing process is ISO 9001 certified. Dedicated flatbed transport is available for oversized bits, with crating compliant with IMO IMDG Code for international shipments. A 1-year warranty covers manufacturing defects, including free bearing replacement for premature failure, excluding normal wear and tear.
The IADC 537G TCI bit is designed for soft to medium formations with low compressive strength, including medium soft shale, medium soft limestone, medium soft sandstone, clay, and siltstone.
The maximum weight on bit rating for the 22 inch IADC 537G TCI tricone bit is 500kN, with an operating range of 0.45-1.0 kN/mm.
Standard configuration includes three jet nozzles. Optional sizes include jet nozzles in 16mm, 18mm, and 20mm diameters, and impact nozzles in 2mm and 14mm diameters to accommodate different mud types and flow rates.
