|
1.
The main crown technical parameters of impregnated diamond core bits include diamond grade, size, concentrarion and quality, matrix hardness and crown shapes. The users can make rational selections according to the formations to be drilled.
To avoid exessive bit wear, tungsten carbide inserts are used on both sides on the waterway, and gage stones are a bit larger.
2.
Suface 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 homeogeneous formations. To avoid excessive matrix wear at the leading edge of each segment. tungsten carbde inserts are fitted on each side of rhe waterway. This kind of bits cannot be used in broken or loose formations.
|
ITEM
|
DIAMOND BIT
|
REAMING SHELL
|
|
"Q" Series Wireline
|
Size
|
Bit-set OD
|
Bit-set ID
|
|
mm
|
inch
|
mm
|
inch
|
mm
|
inch
|
|
AQ
|
47.60
|
1.88
|
26.97
|
1.06
|
48.00
|
1.89
|
|
BQ
|
59.50
|
2.35
|
36.40
|
1.43
|
59.90
|
2.36
|
|
NQ
|
75.30
|
2.97
|
47.60
|
1.88
|
75.70
|
2.98
|
|
HQ
|
95.58
|
3.77
|
63.50
|
2.50
|
96.00
|
3.78
|
|
PQ
|
122.00
|
4.80
|
84.96
|
3.35
|
122.60
|
4.83
|
|
Swedish Metric T2 Series
|
36
|
36.0
|
1.417
|
22.0
|
0.866
|
36.3
|
1.429
|
|
46
|
46.0
|
1.811
|
32.0
|
1.260
|
46.3
|
1.823
|
|
56
|
56.0
|
2.205
|
42.0
|
1.654
|
56.3
|
2.217
|
|
66
|
66.0
|
2.598
|
52.0
|
2.047
|
66.3
|
2.610
|
|
76
|
76.0
|
2.992
|
62.0
|
2.441
|
76.3
|
3.004
|
|
86
|
86.0
|
3.386
|
72.0
|
2.835
|
86.3
|
3.398
|
|
101
|
101.0
|
3.976
|
84.0
|
3.307
|
101.3
|
3.988
|
|
Swedish T Series
|
TAW
|
47.6
|
1.875
|
23.2
|
1.31
|
48.0
|
1.89
|
|
TBW
|
59.5
|
2.345
|
44.9
|
1.77
|
59.9
|
2.36
|
|
TNW
|
75.3
|
2.965
|
60.5
|
2.38
|
75.7
|
2.98
|
|