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17-1/2" Diamond PDC Drill Bits S423 PDC Bits for Geothermal Drilling

Bit Size 17 1/2"(444.5mm)
Bit Connection 7 5/8"
IADC Code: S423
Blade Count 6pcs
Primary Cutter 19mm
Nozzles 7pcs
Junk Slot Area (in2) 72.15
Bit Rotary Speed (rpm) 60~260
Weight-On-Bit (KN) 30~180
Flow Rate (lps) 40~70

Application

Medium Hard formation of high resist compression strength, and have hard interlayer. Such as argillite, sandstone, limestone and so on.

Feature

Cutter backing raised to minimize excessive depth of cut because of formation heterogeneity.Reduces cutter loading; minimize torque in transitional drilling.Minimizes cutter breakage and extends bit life.

Thermally stable polycrystalline (TSP) diamonds are placed on the leading edge of each blade.

Backreaming cutters. Strategic placement of cutters on the upside of each blade, to allow backreaming in tight spots, reduces the potential of "bit sticking" while pulling out of the hole.

Balanced force design of spiral blades endows the bits with good orientation,little radial vibration as well as ability to increase cutter placement

The reasonable layout of patented PDC cutters in various structures at different locations endows the bits with strong aggressiveness and anti-abrasiveness

Strong aggressiveness allows the bits high ROP

The simulation technology of dynamic flow field are used in hydraulic design to optimize down-hole flow field,beneficial to improve clearance speed and anti-balling simultaneously