PDC Bits

Product name : 8 1/2 inch PDC bit
Product model : 8 1/2 inch PDC bit
Product No. : PDC bit

8 1/2 inch PDC bit

                           Bit diameter 8 1/2"
                                                      Body Type Steel
                                          Number of Blades 6",5 blades;8 1/2",6 blades
                                        Thread Connection 4 1/2 API REG PIN
 Primary Cutters and Secondary Cutters Number 16mm*24pcs;13mm*40pcs
                                 Gauge Cutters  Number 13mm*32pcs
               Gauge Protection Cutters  Number 13mm*28pcs
                     Back Reaming Cutters Number ---
                           Gauge Protection Materials Tungsten Carbide,PDC cutter
                                  Gauge Protection Type Normal
                          Length of Gauge Protection ---
                                         Number of Nozzle 8 1/2" - 6 pcs;6" - 5pcs
                                     Total Flow Area(TFA) ---
                                               Junk Slot Area ---
                                     Production Standard API Spec 7-1

Polycrystalline diamond compact (PDC) bits deliver premium performance and durability for a wide range of standard drilling applications. These matrix- and steel-bodied bits incorporate the latest cutter technology, computational fluid dynamics (CFD), enhanced hydraulics, and various structure geometries to maximize ROP.
**Matrix-body bit
Matrix-body PDC bits are commonly preferred over steel-body bits for environments in which body erosion is likely to cause a bit to fail. For diamond-impregnated bits, only matrix-body construction can be used.
** Steel-body bits
The strength and ductility of steel give steel-bit bodies high resistance to impact loading. Steel bodies are considerably stronger than matrix bodies.A beneficial feature of steel bits is that they can easily be rebuilt a number of times because worn or damaged cutters can be replaced rather easily. This is a particular advantage for operators in low-cost drilling environments.

Rock hardness and bit selection 
Cone bit IADC code  PDC  Formation  Rock Types  Compressive strength (Mpa) ROP(m/h)
111/124 M/S112~M/S223 Very soft: low viscosity, low compressive strength.




<25 >20
116/137 M/S222~M/S323 Soft: the formation is soft with low compressive strength and good drillability. Clay rocks
25~50 10~20
417/527 M/S323~M/S433 Medium soft: weak to medium, low compressive strength. Clay rocks
50~75 5~15
517/537 M322~M443 Medium to hard formation with high compressive strength and poor abrasion resistance. mudstone
Sandy limestone
75~100 2~6
537/617 M422~M444 Medium hardness: hard, dense formation with high compressive strength and moderate wear. The marble
Hard shale
100~200 1.5~3


Superdrill specialize in research and development of drilling tools and drilling equipments, we are manufacturing and marketing with senior technical staffs for many years. Our company has a group of experienced designers and engineers, who are servicing in dr.... [View More]

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