PDC Bits

Product name : 12 1/4 inch PDC bit M166
Product model : 12 1/4 inch PDC bit M166
Product No. : PDC bit
Details:

12 1/4 inch  PDC bit M166

                                    Number of Blades    6
                                    Primary Cutter Size   16mm
                                                 Nozzle Qty.    7NZ
                                            Gauge Length    3 Inch
                                                RPM (r/min)    80~250
                                                   WOB(KN)    30~140
                                           Flow Rate (lps)    28~70
                                                Application Soft to medium-hard formations with low
compressive strength interbedded with hard
layer , such as claystone,marl,lignite,
sandstone,anhydrite, tuff, etc.
                                                  Features The M1662 is a matrix body PDC bit with 6
curved blade with back-reaming and spiral
gauge protection. Optimized Hydraulie design
and enhanced cleaing and cooling effects of
the bits to prevent bit from balling.

 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.

clay

siltsone

sandstone

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




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