Home   |    Favorite   |   Contact
Shaanxi Senwell Drilling Equipment Co., Ltd
Jenny(General manager)
Tel:0086-29-85370919
Fax:0086-29-85370919
E-mail:Jennysaless@vip.163.com
                sales@oiltoolsdp.com
Website:Http://www.oiltoolsdp.com
 

Non-Magnetic Drill Collar

Non-Magnetic Drill Collar basic infomation

Catalog: Non-Magnetic Products
Keywords: Non-Magnetic Drill Collar
Tel: 0086-29-85370919
Fax: 0086-29-85370919
E-mail: Jennysaless@vip.163.com
Non-Magnetic Drill Collar basic infomation

Non-magnetic Drill Collar

Non-magnetic Drill collars are made from Non-magnetic drill collar materials with low- strength (SWNM20-14) by combining a proprietary chemical analysis and a rotary hammer forging process with low magnetic permeability excellent machine ability. The material is resistant to stress corrosion cracking, with high machine ability and no tendency to galling.

Each drill collar is fully inspected by internal inspection dept. Strict to control of chemical composition and special forging process guarantee the excellent mechanical properties of SENWELL’S non-magnetic tools.

 

Non magnetic Properties:

Relative Permeability: Max1.005

Hot spot/Field Gradient B: Max ± 0.05μT

When MPS=1 ×105/4πA/m:

Special Treatment on ID: Roller Burnishing (After roller burnishing, a compressive layer come into being)

Advantage:

a.) Increase the corrosion resistance properties

b.) Increase the surface hardness of bore up to HB400

c.) Increase surface finished of bore to Ra≤3.2μm

Inspection& test items for each Non-magnetic drill collar, non-magnetic stabilizer etc.

Chemical composition, Tensile Test, Impact Test, Hardness Test, Metallographic Test (Grain Size), Corrosion Test (according to ASTM A262 Practice E), Ultrasonic Test over the whole length of the bar (according to ASTM A388), Relative Magnetic Permeability Test, Hot Spot Test, Dimension Test etc.


Drill collars are available in lengths from 10 to 31 feet and outside diameter from 3 1/8” to 11".

 

Mechanical Properties

Steel Grade

OD Range (in)

Yield Strength

Rt

Tensile Strength

Rm

Elongation

A

Impact Value

Hardness

Brinell

Mpa

ksi

Mpa

ksi

(%)

(Akv)

(HB)

NM-1

3 1/8”~6 7/8”

≥758

≥110

≥827

≥120

≥25

≥150

Longitudinal

285-360

7”~11”

≥689

≥100

NM-2

3 1/8”~6 7/8”

≥827

≥120

≥896

≥130

≥25

≥150

Longitudinal

285-360

7”~11”

≥758

≥110

NM-3

3 1/8”~6 7/8”

≥965

≥140

≥1034

≥150

≥20

≥90

Longitudinal

330-400

7”~11”

≥896

≥130

NM-4

3 1/8”~6 7/8”

≥827

≥120

≥896

≥130

≥20

≥75

Longitudinal

285-360

7”~11”

≥785

≥110

 

Technical specifications and parameters for Non-magnetic Drill Collars

OD

ID

Length (mm)

Bevel diameter (mm)

Connection

Bending strength ratio

in

mm

in

mm

3-1/8

79.4

1-1/4

31.8

9150

76.2

NC23-31

2.57:1

3-1/2

88.9

1-1/2

38.1

9150

82.9

NC26-35 (2 3/8IF)

2.42:1

4-1/8

104.8

2

50.8

9150

100.4

NC31-41 (2 7/8IF)

2.43:1

4-3/4

120.7

2

50.8

9150

114.7

NC35-47

2.58:1

5

127

2-1/4

57.2

9150

121.0

NC38-50 (3 1/2IF)

2.38:1

6

152.4

2-1/4

57.2

9150/9450

144.5

NC44-60

2.49:1

6

152.4

2-13/16

71.4

9150/9450

144.5

NC44-60

2.84:1

6-1/4

158.8

2-1/4

57.2

9150/9450

149.2

NC44-62

2.91:1

6-1/4

158.8

2-13/16

71.4

9150/9450

150.0

NC46-62 (4IF)

2.63:1

6-1/2

165.1

2-1/4

57.2

9150/9450

154.8

NC46-65 (4IF)

2.76:1

6-1/2

165.1

2-13/16

71.4

9150/9450

154.8

NC46-65 (4IF)

3.05:1

6-3/4

171.4

2-1/4

57.2

9150/9450

159.5

NC46-67 (4IF)

3.18:1

6-3/4

171.4

2-13/16

71.4

9150/9450

159.5

NC50-67 (41/2IF)

2.37:1

7

177.8

2-1/4

57.2

9150/9450

164.7

NC50-70 (41/2IF)

2.54:1

7

177.8

2-13/16

71.4

9150/9450

164.7

NC50-70 (41/2IF)

2.73:1

7-1/4

184.2

2-13/16

71.4

9150/9450

169.5

NC50-72 (4 1/2IF)

3.12:1

7-3/4

196.8

2-13/16

71.4

9150/9450

185.3

NC56-77

2.70:1

8

203.2

2-13/16

71.4

9150/9450

190.1

NC56-80

3.02:1

8-1/4

209.6

2-13/16

71.4

9150/9450

195.7

6 5/8REG

2.93:1

9

228.6

2-13/16

71.4

9150/9450

212.7

NC61-90

3.17:1

9-1/2

241.3

3

76.2

9150/9450

223.8

7 5/8REG

2.81:1

9-3/4

247.6

3

76.2

9150/9450

232.6

NC70-97

2.57:1

10

254

3

76.2

9150/9450

237.3

NC70-100

2.81:1

11

279.4

3

76.2

9150/9450

266.7

8 5/8REG

2.84:1

Shaanxi Senwell Drilling Equipment Co.,Ltd    Jenny (General Manager)
Tel:0086-29-85370919     Fax:0086-29-85370919
Email:Jennysaless@vip.163.com     sales@oiltoolsdp.com
Forging and Casting (4)
Drill Stem Tools (31)
Stabilizer (6)
Subs (8)
Valves (4)
New Products (4)
Non-Magnetic Products (5)
Core Tools (1)
Drill Bits (4)
Fishing Tools (27)
Mill Tools (13)
Cementing Tools (17)
Cement Head (3)
Stage Cementer (5)
Centralizer and Stop Collar (4)
Float Collar & Float Shoe (1)
Casing & Drill Pipe Protector (1)
Cementing Truck (1)
Liner Hanger (2)
Accessory Tools (4)
Wellhead Tools (12)
Rotary Slips (6)
Downhole Tools (10)
Downhole Motor (1)
Jar tools (9)
Oil Mining Equipment (27)
Casing Head (1)
Tubing Head (1)
Christmas Tree (6)
Sucker Rod (3)
Sucker Rod Pump (4)
Pumping Unit (9)
Other Pump (3)
Drill Equipments (28)
Truck-mounted Rig (5)
Rig Component (10)
Solid Control System (6)
Workover Rig (7)
Well Control System (14)
BOP (5)
Valve (3)
Hose (3)
Choke and Kill Manifold (3)
Pipe Series (21)
Casing (2)
Line Pipe (1)
Vessel,Boiler and Other pipe (14)
Petrochemical Pipe (2)
Tubing (2)