8 1/2 inch PDC bit M166
|Number of Blades||6|
|Primary Cutter Size||16mm|
|Gauge Length||2.2 Inch|
|Flow Rate (lps)||22~35|
Soft to medium-hard formations with low
compressive strength interbedded with hard
layer , such as claystone,marl,lignite,
The M1663 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.
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.