API Spec Non Magnetic Spiral Drill Collar Oil Field Drilling Tools
Description:
Drill collars are manufactured from 4145H modified steel.Drill collars are bored and drifted to API Spec 7-1 and fully heated to meet or exceed the mechanical property requirements of API Spec.Hardness range of 285-341HB and a charpy “V”notch impact value of 54 joules are guaranteed one inch below the surface
When enquiries or orders,please specify:
Slick or spiral ; Drill collar OD ; Drill collar bore ; Length of drill collar; Connection type
Applications:
Drilling tool stabilizer is an important tool for oil, gas and geology exploration drilling engineering to prevent well deflection. Drill collars,heavy weight drill pipe and lifting subs are tools matched with stabilizers.
Drill collars are bored and drifted to API Spec 7-1 and fully heated to meet or exceed the mechanical property requirements of API Spec.
Specifications:
1.Material:4145H,4145Mod,40CrMnMo etc.
2. Standard size, inner diameter and thread for drill collar
|
No.
|
Outer diameter
|
Inner diameter
|
Length
mm
|
Should chamfering diameter
|
Bending
strength
|
|
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 / 9450
|
100.4
|
2.43:1
|
|
NC35-47
|
120.7
|
4 3/4
|
50.8
|
2
|
9150 / 9450
|
114.7
|
2.58:1
|
|
NC38-50
|
127.0
|
5
|
57.2
|
2 1/4
|
9150 / 9450
|
121.0
|
2.38:1
|
|
NC44-60
|
152.4
|
6
|
57.2
|
2 1/4
|
9150 / 9450
|
144.5
|
2.49:1
|
|
NC44-60
|
152.4
|
6
|
71.4
|
2 13/16
|
9150 / 9450
|
144.5
|
2.84:1
|
|
NC44-62
|
158.8
|
6 1/4
|
57.2
|
2 1/4
|
9150 / 9450
|
149.2
|
2.91:1
|
|
NC46-62
|
158.8
|
6 1/4
|
71.4
|
2 13/16
|
9150 / 9450
|
150.0
|
2.63:1
|
|
NC46-65
|
165.1
|
6 1/2
|
57.2
|
2 1/4
|
9150 / 9450
|
154.8
|
2.76:1
|
|
NC46-65
|
165.1
|
6 1/2
|
71.4
|
2 13/16
|
9150 / 9450
|
154.8
|
3.05:1
|
|
NC46-67
|
171.4
|
6 3/4
|
57.2
|
2 1/4
|
9150 / 9450
|
159.5
|
3.18:1
|
|
NC50-67
|
171.4
|
6 3/4
|
71.4
|
2 13/16
|
9150 / 9450
|
159.5
|
2.37:1
|
|
NC50-70
|
177.8
|
7
|
57.2
|
2 1/4
|
9150 / 9450
|
164.7
|
2.54:1
|
|
NC50-70
|
177.8
|
7
|
71.4
|
2 13/16
|
9150 / 9450
|
164.7
|
2.73:1
|
|
NC50-72
|
184.2
|
7 1/4
|
71.4
|
2 13/16
|
9150 / 9450
|
169.5
|
3.12:1
|
|
NC56-77
|
196.8
|
7 3/4
|
71.4
|
2 13/16
|
9150 / 9450
|
185.3
|
2.70:1
|
|
NC56-80
|
203.2
|
8
|
71.4
|
2 13/16
|
9150 / 9450
|
190.1
|
3.02:1
|
|
6 5/8
REG
|
209.6
|
8 1/4
|
71.4
|
2 13/16
|
9150 / 9450
|
195.7
|
2.93:1
|
|
NC61-90
|
228.6
|
9
|
71.4
|
2 13/16
|
9150 / 9450
|
212.7
|
3.17:1
|
|
7 5/8
REG
|
241.3
|
9 1/2
|
76.2
|
3
|
9150 / 9450
|
223.8
|
2.81:1
|
|
NC70-97
|
247.6
|
9 3/4
|
76.2
|
3
|
9150 / 9450
|
232.6
|
2.57:1
|
|
NC70-100
|
254.0
|
10
|
76.2
|
3
|
9150 / 9450
|
237.3
|
2.81:1
|
|
8 5/8
REG
|
279.4
|
11
|
76.2
|
3
|
9150 / 9450
|
266.7
|
2.84:1
|
3. Mechanical property for dill collar
|
Outer diameter
|
Yield strength σ0.2
|
Tensile strengthσb
|
Elongation
δ4
|
Brinell Hardness
HB
|
Impact Value
Ak
|
|
mm
|
in inch
|
|
79.4～171.4
|
3 1/8～6 3/4
|
≥758
|
≥965
|
≥13
|
285～341
|
≥54
|
|
177.8～279.4
|
7～11
|
≥689
|
≥930
|
Competitive Advantage:
Strict quality control
Competitive price
Just-in-time delivery
Specialist services
Quality certificate:ISO9001:2008
Product Tags:
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Non Magnetic Drill Collar Oil Field Drilling Tools 9150 and 9650mm API Certification Images
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