Geological drilling tools&drag well chevron type stepped drill bit
Chevron-Type Drag Bits
Chevron-type drag bits are recommended for drilling in slightly harder and more consolidated materials than step-type drag bits, such as hard shales, limestones, and unconsolidated gravels.size 3inch upto26inch,3 wings ,4wings,5 wings
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water/oil well drilling 12 1/4 5 blades PDC rock drill bit | size:12 1/4"(311.1mm) body type:steel body primary cutter size: 16mm number of nozzle : 9 number of blade:6 Gauge length:2.5" connection :6 5/8" AP... | |
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