Product Description
The high-strength diamond drill bit blade adopts the latest developed spherical diamond blade, characterized by fast drilling speed and strong impact resistance. When the drill bit is drilling, the lip is used for scraping the normal and uniform formation rock, and the protruding part can suppress the sudden large footage when the drill bit encounters gaps during the drilling process, greatly reducing the accidental damage of the drill bit and improving the drilling level to deal with complex rock formations.

Key Features & Technical Specifications

Outer diameter: 152mm (6 inches). Inner core diameter: 126mm. 

PDC cutters: 1304 series, 11 cutters on the annulus. 

Waterway area: 16 cm squared. Recommended pump flow: 200-350 L/min. 

Maximum WOB: 2500 kgf. Overall length: 220mm.

Performance Advantages

In medium-hard formations at 35-90 MPa, the 6-inch PDC core bit maintains 1.2-2.8 m/min with core recovery ratios of 85-95% in competent rock. The 89mm core diameter provides 40% more sample volume than the 99mm bit's 63mm core while only requiring 25% more pump output. Matrix body gauge retention keeps oversize below 1.5mm after 500m of drilling in abrasive formations. The flat crown profile is less prone to directional deviation than concave profiles, holding borehole deviation below 1 degree per 100m — useful when the core hole serves as a pilot for subsequent reaming to larger well diameter.

Application Scenarios

Water-well formation coring in rural development projects across Africa and South Asia. Pilot holes for subsequent reaming to 8-inch or 10-inch production wells. Mineral exploration diamond-drill replacement where PDC cutters provide faster ROP in soft-medium rock at lower cost per meter. Environmental site assessment requiring rock and soil core samples to 150m depth. Agricultural irrigation well aquifer confirmation in alluvial fan deposits.

Problem-Solving Capabilities

Many water-well drillers in developing regions face the dilemma of needing formation information while working with rigs that have limited capacity for tripping heavy coring tools. The 6-inch PDC core bit weighs only 5.8 kg, making it one of the lightest coring options that still provides an 89mm core — large enough for visual aquifer identification and basic permeability testing. This lightweight design reduces handling time during tripping by 25-35% compared to 7-inch or 8-inch core barrels, allowing crews with manual pipe handling to run coring programs that would otherwise require mechanized rod handlers. A drilling NGO in East Africa reported that the 6-inch PDC core bit increased their daily coring footage by 50% compared to their previous 7-inch setup.

Technical Support & Customization

SUNGOOD provides core bit inner diameter options of 76mm, 89mm (standard), and 100mm for the 152mm outer diameter. Matrix body hardness can be selected from HRC 32 (soft formations) to HRC 42 (hard abrasive formations). Impregnated diamond ring options are available for interbedded hard zones within otherwise PDC-drillable sequences. Custom nose profiles including semi-round and tapered designs can be specified for specific directional control requirements. Connection threads compatible with AQ, BQ, and NQ wireline core barrel systems are available.

Related product: 99mm PDC coring bit