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API 5DP N1310 Non-Magnetic Drill Collars-

  • API 5DP N1310 Non-Magnetic Drill Collars-
  • API 5DP N1310 Non-Magnetic Drill Collars-
  • API 5DP N1310 Non-Magnetic Drill Collars-
  • API 5DP N1310 Non-Magnetic Drill Collars-
  • API 5DP N1310 Non-Magnetic Drill Collars-
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Product Description
Non-magnetic Drill Collars
 
·   According to API Spec.7 and SY/T5144, the non-magnetic drill collars are made of low carbon stainless steel N1310 L-C alloy steel, which are researched and developed independently by our technical personnel. All threads are cold rolled, and they are machined with CNC Lathes –Double –shouldered, including some special threads.
 
Standard size
No.
Outer diameter
Internal diameter
Length
mm
D
     mm
Bending strength ratio
mm
in
mm
in
NC23-31
79.4
3 1/8
31.8
1 1/4
9150
76.2
2.57:1
NC26-35
88.9
3 1/2
38.1
1 1/2
9150
82.9
2.42:1
NC31-41
104.8
4 1/8
50.8
2
9150 or 9450
100.4
2.43:1
NC35-47
120.7
4 3/4
50.8
2
9150 or 9450
114.7
2.58:1
NC38-50
127.0
5
57.2
2 1/4
9150 or 9450
121.0
2.38:1
NC44-60
152.4
6
57.2
2 1/4
9150 or 9450
144.5
2.49:1
NC44-60
152.4
6
71.4
2 13/16
9150 or 9450
144.5
2.84:1
NC44-62
158.8
6 1/4
57.2
2 1/4
9150 or 9450
149.2
2.91:1
NC46-62
158.8
6 1/4
71.4
2 13/16
9150 or 9450
150.0
2.63:1
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
NC46-67
171.4
6 3/4
57.2
2 1/4
9150 or 9450
159.5
3.18:1
NC50-67
171.4
6 3/4
71.4
2 13/16
9150 or 9450
159.5
2.37:1
NC50-70
177.8
7
57.2
2 1/4
9150 or 9450
164.7
2.54:1
NC50-70
177.8
7
71.4
2 13/16
9150 or 9450
164.7
2.73:1
NC50-72
184.2
7 1/4
71.4
2 13/16
9150 or 9450
169.5
3.12:1
NC56-77
196.8
7 3/4
71.4
2 13/16
9150 or 9450
185.3
2.70:1
NC56-80
203.2
8
71.4
2 13/16
9150 or 9450
190.1
3.02:1
6 5/8REG
209.6
8 1/4
71.4
2 13/16
9150 or 9450
195.7
2.93:1
NC61-90
228.6
9
71.4
2 13/16
9150 or 9450
212.7
3.17:1
7 5/8REG
241.3
9 1/2
76.2
3
9150 or 9450
223.8
2.81:1
NC70-97
247.6
9 3/4
76.2
3
9150 or 9450
232.6
2.57:1
NC70-100
254.0
10
76.2
3
9150 or 9450
237.3
281:1
8 5/8REG
279.4
11
76.2
3
9150 or 9450
266.7
2.84:1
Dimensional tolerance
 
range for outer diameter
O.D. Tol.
I.D. Tol.
 
Length
DF
mm
in
≤88.9
≤3 1/2
+1.2
0
+1.6
0
+152.4
±0.4
>88.9~114.3
>3 1/2~4 1/2
+1.6
0
>114.3~139.7
>4 1/2~5 1/2
+2.0
0
>139.7~165.1
>5 1/2~6 1/2
+3.2
0
>165.1~215.9
>6 1/2~8 1/2
+4.0
0
>215.9~241.3
>8 1/2~9 1/2
+4.8
0
>241.3
>9 1/2
+6.4
0
 
Mechanical property
 
Range for outer diameter
Yield Strengthσ0.2
MPa
Tensile Strengthσb
MPa
Elongationδ4
%
 
mm
in
79.4~171.4
3 1/8~6 3/4
≥758
≥827
≥18
177.8~279.4
7~11
≥689
≥758
≥20
 
Magnetic property (magnetic field = 1×105/4πA/m)
1.      Ur1.010
2.      ΔB≤0.05μT
1.Average : Ur<1.010
2. Magnetic field gradient : ΔB≤0.05μT
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