Vigor’s Non-magnetic drill collar is made from low carbon high-chromium manganese alloy steel, it is refined with strict chemical composition control, specially forged to achieve high strength mechanical properties and low magnetic permeability, excellent intergranular corrosion cracking resistance, and wear resistance. Non-magnetic drill collar used with MWD, and LWD for Directional Drilling applications, to allow magnetic surveying of the well trajectory using instruments inside the drill string. Magnetic survey instruments (MWD) run in the hole located in the non-magnetic drill collar to allow the measurement of the earth’s magnetic field without magnetic interference. Survey instruments are isolated from magnetic disturbance caused by steel components in the BHA and drill pipe.
OD
ID
Length mm
Style of connection
Bevel diameter mm
Bending strength ratio
mm
in
mm
in
79.4
3 1/8
31.8
1 1/4
9150
NC23-31
76.2
2.57:1
88.9
3 1/2
38.1
1 1/2
9150
NC26-35(23/8IF)
82.9
2.42:1
104.8
4 1/8
50.8
2
9150
NC31-41(27/8IF)
100.4
2.43:1
120.7
4 3/4
50.8
2
9150
NC35-47
114.7
2.58:1
127.0
5
57.2
2 1/4
9150
NC3850(31/2IF)
121.0
2.38:1
152.4
6
57.2
2 1/4
9150/9450
NC44-60
144.5
2.49:1
158.8
6 1/4
57.2
2 1/4
9150/9450
NC44-62
149.2
2.91:1
158.8
6 1/4
71.4
2 13/16
9150/9450
NC46-62(4IF)
150.0
2.63:1
165.1
6 1/2
57.2
2 1/4
9150/9450
NC46-65(4IF)
154.8
2.76:1
165.1
6 1/2
71.4
2 13/16
9150/9450
NC46-65(4IF)
154.8
3.05:1
171.4
6 3/4
57.2
2 1/4
9150/9450
NC46-67(4IF)
159.5
3.18:1
171.4
6 3/4
71.4
2 13/16
9150/9450
NC50-67(41/2IF)
159.5
2.37:1
177.8
7
57.2
2 1/4
9150/9450
NC50-70(41/2IF)
164.7
2.54:1
177.8
7
71.4
2 13/16
9150/9450
NC50-70(41/2IF)
164.7
2.73:1
184.2
7 1/4
71.4
2 13/16
9150/94500
NC50-72(41/2IF)
169.5
3.12:1
196.8
7 3/4
71.4
2 13/16
9150/9450
NC50-77
185.3
2.70:1
203.2
8
71.4
2 13/16
9150/9450
NC50-80
190.1
3.02:1
209.6
8 1/4
71.4
2 13/16
9150/9450
6 5/8REG
195.7
2.93:1
228.6
9
71.4
2 13/16
9150/9450
NC61-90
212.7
3.17:1
241.3
9 1/2
76.2
3
9150/9450
7 5/8REG
223.8
2.81:1
247.6
9 3/4
76.2
3
9150/9450
NC70-97
232.6
2.57:1
254.0
10
76.2
3
9150/9450
NC70-100
237.3
2.81:1
279.4
11
76.2
3
9150/9450
8 5/8REG
266.7
2.84:1
※Drill collar can be customized as per the customer's design.
OD (in)
4 3/4
6 1/4
6 3/4
7 1/4
7 1/2
8
9 1/2
10
11
Depth of Cut (in)
7/32
±1/32
9/32
±1/16
5/16
±1/16
11/32
±1/16
11/32
±1/16
3/8
±1/16
13/32
±3/32
7/16
±3/32
15/32
±3/32
Spiral Pitch (in)
38
±1
42
±1
46
±1
64
±1
64
±1
68
±1
72
±1
76
±1
80
±1
※ Drill collar can be customized as per the customer's design.
Mechanical properties
Specification
Tensile Strength, Mpa
≥1035
Yield Strength, Mpa
≥965
Elongation,%
≥20
Reduction in Area,%
≥50
Charpy Impact Work, J
≥122
Brinell Hardness(25.4 mm),HB
≥290
Magnetic Gradient,μT
±0.05
Q: What is the relative permeability of your Non-magnetic material?
A: When the magnetic field is 1*105/4π A/m relative permeability is μr1.008 or less.
Want more information on Non Magnetic Drill Collar Manufacturer? Click the link below to contact us.