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Product type:Oil Country Tubular Goods--Drilling String
 
Name:Non magnetic drill collar
Item:ydaer_1
Description:
        Materials of the Non-magnetic drill collars are from chrome manganese, low carbon obtained by combining a proprietary chemical analysis and a rotary hammer process. The material is resistant to stress corrosion cracking, with high machine ability and no tendency to galling.
Magnetic permeability (when MPS=1105/4Nm) relative max r:1.010. 
Magnetic field gradient (hot spots) max: B 0.05micro tesla/100mm.
 
Mechanical Property
OD
Yield strength  0.2
Tensile strength b
Elongation 4%
mm
in
79.4--171.4
3 1/8--6 3/4
758
827
18
177.8--279.4
7--11
689
758
20
 
Technical Parameters
No.
Outer diameter
Inter diameter
Length
mm
DF
mm
Bending strength ratio
mm
in
mm
in
NC46-65
165.1
6 1/2
57.2
2 1/4
9150 or 9450
154.8
2.76:1
NC46-65
165.1
6 1/2
71.4
2 13/16
9150 or 9450
154.8
3.05:1
6 5/8REG
209.6
8 1/4
71.4
2 13/16
9150 or 9450
195.7
2.93:1
1 2

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