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Henan Jianhui Construction Machinery Co.

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 Henan Jianhui Construction Machinery Co.

China

Main Product:steel products

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Spiral Drill Collar
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Product：
Price： Negotiable 
MOQ：  
Total supply：
Delivery time： From the date of payment from the buyer within 3days of delivery
update time： 2020-12-12 01:00  Valid to：Long-term effective
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Product Information

Name:Spiral Drill Collar

Material: AISI 4145H

Standard: API Spec 7-1 and SY/T5144
Product Detail

The Spiral Drill Collar is made from AISI 4145H modified alloy steel, and completely meets the requirement of API Spec 
7-1 and SY/T5144 Standard. It is a kind of drill collar which adds three dextrogyrate spiral groove on the outer circle of ordinary drill collar when processing, and the purpose is to reduce the area of contact and friction with the well wall, 
which can effectively prevent the pressure sticking. The single weight of the spiral drill collar is round about 4% lighter 
than the ordinary drill collar with the same specification, and the shape and thread of the both ends are the same with 
the drill collar

 

Model

OD

ID

L mm

DF mm

BST

mm

in

mm

in

NC23-31

79.4

3 1/8

31.8

1 1/4

9150

76.2

2.57:1

NC26-35(2 3/8IF)

88.9

3 1/2

38.1

1 1/2

9150

82.9

2.42:1

NC31-41(2 7/8IF)

104.8

4 1/8

50.8

2

9150

100.4

2.43:1

NC35-47

120.7

4 3/4

50.8

2

9150

114.7

2.58:1

NC3850(3 1/2IF)

127.0

5

57.2

2 1/4

9150

121.0

2.38:1

NC44-60

152.4

6

57.2

2 1/4

9150/9450

144.5

2.49:1

NC44-62

158.8

6 1/4

57.2

2 1/4

9150/9450

149.2

2.91:1

NC46-62(4IF)

158.8

6 1/4

71.4

2 13/16

9150/9450

150.0

2.63:1

NC46-67(4IF)

171.4

6 3/4

57.2

2 1/4

9150/9450

159.5

3.18:1

NC50-67(4 1/2IF)

171.4

6 3/4

71.4

2 13/16

9150/9450

159.5

2.37:1

NC50-72(4 1/2IF)

184.2

7 1/4

71.4

2 13/16

9150/9450

169.5

3.12:1

NC50-77

196.8

7 3/4

71.4

2 13/16

9150/9450

185.3

2.70:1

NC50-80

203.2

8

71.4

2 13/16

9150/9450

190.1

3.02:1

6 5/8REG

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 5/8REG

241.3

9 1/2

76.2

3

9150/9450

223.8

2.81:1

NC70-100

254.0

10

76.2

3

9150/9450

237.3

2.81:1

8 5/8REG

279.4

11

76.2

3

9150/9450

266.7

2.84:1

 
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