Abrasive reason of the core bi

Details:SANYOU   |  2021-01-18

1、 Bottom surface became and drilling too slow

Reason:  the drill bit matrix is too hard.
2、Bottom matrix become cone shape

Reason: Drilled into crush rock.
3、Eccentric abrasion

Reason: Poor concentricity between core bit and drill tool or water gap specification is different from water channel
4、Outside diameter of bit abrasive seriouslyeven grid to cone shape.

Reason: cleaning bottom of hole for a long time

5、Inside diameter of bit abrasive seriouslyeven grid to horn shape.

Reason:  Cleaning core for a long time and the core is jammed.


6、Inside and outside diameter abrasive seriously even appear steps.

Reason: There are metal chippings at the bottom of hole. Rock debris and diamond mal-distribution.
7、The matrix abrasive too fast and diamond is overexposure.

Reason: matrix is too soft or rock powder over pile.
8、There is groove on bit surface

Reason: insufficient cooling down for core bit,Rock debris inside and diamond mal-distribution.
9
There is groove in water gap or bottom surface

Reason: High sand-carrying capacity of washing fluid,matrix is too soft and pump volume is too large.
10
The steel and matrix become blue

Reason: insufficient cooling,light burning

11、Matrix crack

Inside and outside channel are too deep

12、Steel crack  There is hard smash in the hole


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