api 7-1 spiral drill collar carbon steel material with hot rolling technique

spiral drill collar, 1.standard:API 7-1, 2.OD:79.4mm-279.4mm, 3.Certifactes: ISO ,API 7-1, 4.Moq: 25 tons - details see: https://www.machineto.com/api-7-1-spiral-drill-collar-carbon-steel-material-with-hot-rolling-technique-10317634
Place of Origin:Shaanxi China (Mainland)Brand Name:Chang GongModel Number:4"-11"Type:Drill Collar
Machine Type:Drilling ToolCertification:APIMaterial:Carbon SteelProcessing Type:Forging
Use:Well Drilling   
api 7-1 spiral drill collar carbon steel material with hot rolling technique
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spiral drill collar


1.standard:API7-1
2.OD:79.4mm-279.4mm
3.factory directly delivery
4.Moq: 25 tons

5.Certificates : ISO ,API 7-1

We are "Petrochina " subcompany

Descriptions:

Drill collars is one of the most important product of hexin oil drillings which mainly used to provide bit weight to drill so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. GANG GONGbrand drill collars are manufactured strictly from API Spec7-1 standard.

Type

OD(mm)

ID(mm)

L(m) ±152.4mm d

DF(mm) ±0.4

NC23-31

79.4

31.8

9.14

76.2

NC26-35

88.9

38.1

9.14

82.9

NC31-41

104.8

50.8

9.14or9.45

100.4

NC35-47

120.6

50.8

9.14or9.45

114.7

NC38-50

127

57.2

9.14or9.45

121

NC44-60

152.4

57.2

9.14or9.45

144.5

NC44-60

152.4

71.4

9.14or9.45

144.5

NC46-62

158.8

57.2

9.14or9.45

149.2

NC46-62

158.8

71.4

9.14or9.45

150

NC46-65

165.1

57.2

9.14or9.45

154.8

NC46-65

165.1

71.4

9.14or9.45

154.8

NC46-67

171.4

57.2

9.14or9.45

159.5

NC50-70

177.8

57.2

9.14or9.45

164.7

NC50-70

177.8

71.4

9.14or9.45

164.7

NC50-72

184.2

71.4

9.14or9.45

169.5

NC56-77

196.8

71.4

9.14or9.45

185.3

NC56-80

203.2

71.4

9.14or9.45

190.1

6-5/8REG

209.6

71.4

9.14or9.45

195.6

NC61-90

228.6

71.4

9.14or9.45

212.7

7-5/8REG

241.3

76.2

9.14or9.45

223.8

NC70-97

247.6

76.2

9.14or9.45

232.6

NC70-100

254

76.2

9.14or9.45

237.3

8-5/8REG

279.4

76.2

9.14or9.45

266.7

NC50-67

171.5

71.4

9.14or9.45

159.5

api 7-1 spiral drill collar carbon steel material with hot rolling technique
Packaging Detail:IN bundle,All connections shall be equipped with pressed steel or plastic steel thread protectors.
Delivery Detail:According to the order

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