Surface set diamond core bits can be used with any type
of core barrels. By varying the diamond grade, size, quality and matrix
hardness and crown shapes, the users can satisfactorily drill and
core hard and homogeneous formation.
To avoid excessive matrix wear at the leading edge of each segment
,tungsten carbide inserts are fitted on each side of the waterway.
This kind of bits cannot be used in broken or loose formation. |
The main crown technical parameters of
impregnated diamond core bits include diamond grade,size, concentration
and quality, matrix hardness and crown shapes. The users can make
rational selections according to the formation to be drilled.
To avoid excessive bit wear, tungsten carbide inserts are used on
both sides of the waterway and gage stone are a bit larger. |
