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Jiyuan Zhongzhong Heavy Machinery Manufacture Co., Ltd.

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 Jiyuan Zhongzhong Heavy Machinery Manufacture Co., Ltd.

China

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Current:Home » Product Categories » » API 7-1 Drill Collar-Oil well drilling equipment-China Factory
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API 7-1 Drill Collar-Oil well drilling equipment-China Factory
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Product:
Brand: aa 
Price: 5000.00USD/ 
MOQ: 1  
Total supply:
Delivery time: From the date of payment from the buyer within days of delivery
update time: 2016-07-25 05:36  Valid to:Long-term effective
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Drill Collar-Part of Oil and Gas drilling rig

Product Type:

A. Slick Drill Collar: mainly used to provide bit weight to drill bit so that drill pipe is in tension.

B. Spiral Drill Collar: used to reduce contact area with hole so as to avoid efficiently bit sticking from differential pressure.

C. Spiral Drill Collar With Elevator Groove And Slip Groove:  used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API SPEC7_1. Hard banding is optional at customers' request.

D.Non magnetic Drill Collar: cold rolled finish on both ID and OD surface with unique technical process strengthen the structure and ensures the tools with optimal resistance to stress, corrosion & cracking.

Product Information:

1.Definition:  It is the round pipe with smooth surface and thick wall, and the both ends are machined screw thread for connection.

2.Usage:  It is mainly used between the drill head and the drill pipe, so that it can make the drill head work reposefully and keep right trace by providing the pressure and weight for drill head.

3.Standard:API Spec.7-1 and SY/T 5144

4.Material:AISI 4145H modified alloy steel

5.Inspection&Test: When producing, traceability are maintained from the receipt of raw material to completion of final products, and serial numbers are die-stamped on each workpiece body. During each manufacturing process, inspection and test are performed.

 Specification: 

Connections

OD

ID

Length 

mm

Bevel Diameter Df  mm

Reference Bending Strength Ratio

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 or 9450

100.4

2.43:1

NC35-47

120.7

4 3/4

50.8

2

915 or 9450

114.7

2.58:1

NC38-50

127.0

5

57.2

2 1/4

9150 or 9450

121.0

2.38:1

NC44-60

152.4

6

57.2

2 1/4

9150 or 9450

144.5

2.49:1

NC44-60

152.4

6

71.4

2 13/16

9150 or 9450

144.5

2.84:1

NC44-62

158.8

6 1/4

57.2

2 1/4

9150 or 9450

149.2

2.91:1

NC46-62

158.8

6 1/4

71.4

2 13/16

9150 or 9450

150.0

2.63:1

NC46-65

165.1

6 1/2

57.2

2 1/4

9150 or 9450

154.8

2.76:1

NC46-65

165.1

6 1/2

71.4

2 13/16

9150 or 9450

154.8

3.05:1

NC46-67

171.4

6 3/4

57.2

2 1/4

9150 or 9450

159.5

3.18:1

NC50-67

171.4

6 3/4

71.4

2 13/16

9150 or 9450

159.5

2.37:1

NC50-70

177.8

7

57.2

2 1/4

9150 or 9450

164.7

2.54:1

NC50-70

177.8

7

71.4

2 13/16

9150 or 9450

164.7

2.73:1

NC50-72

184.2

7 1/4

71.4

2 13/16

9150 or 9450

169.5

3.12:1

NC56-77

196.8

7 3/4

71.4

2 13/16

9150 or 9450

185.3

2.70:1

NC56-80

203.2

8

71.4

2 13/16

9150 or 9450

190.1

3.02:1

6 5/8REG

209.6

8 1/4

71.4

2 13/16

9150 or 9450

195.7

2.93:1

NC61-90

228.6

9

71.4

2 13/16

9150 or 9450

212.7

3.17:1

7 5/8REG

241.3

9 1/2

76.2

3

9150 or 9450

223.8

2.81:1

NC70-97

247.6

9 3/4

76.2

3

9150 or 9450

232.6

2.57:1

NC70-100

254.0

10

76.2

3

9150 or 9450

237.3

2.81:1

8 5/8REG

279.4

11

76.2

3

9150 or 9450

266.7

2.84:1

 

Mechanical properties:

OD

Yield Strengh σ0.2

MPa

Tensile Strength

σb

MPa

 

    Elongation

        δ4 %

             mm

         in

 79.4-171.4

   3 1/8-6 3/4

              ≥758

              ≥965

               ≥13

177.8-279.4

7-11

≥689

≥930

 


 

 

 

 

 

 

 

 

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