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Verified Supplier | Dynoland Internation...

Dynoland International Trading Co., Ltd.

China (Mainland) | Trading Company | Contact Details
Experience:
Established 2009
Performance:
Response Rate
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Quick Details

  • Standard: API
  • Standard: API 5DP
  • Grade: API J55-API P110
  • Grade: API J55, API K55, API N80, API L80, API P110
  • Thickness: 2.375 - 8.625 inch
  • Section Shape: Round
  • Outer Diameter: 3.5 - 11 inch
  • Secondary Or Not: Non-secondary
  • Application: Drill Pipe
  • Technique: ERW
  • Certification: API
  • Surface Treatment: Galvanized
  • Special Pipe: API Pipe
  • Alloy Or Not: Is Alloy

Specifications

Spiral Drill Collars 3 1/8"
1.sizes: 3-1/8 to 11 inches
2.Material:AISI 4145H
3.API Spec 7

Spiral Drill Collars 3 1/8"
1.sizes: 3-1/8 to 11 inches
2.Material:AISI 4145H
3.API Spec 7

Full-length heat-treatment processes ensure that mechanical properties meet or exceed API Spec 7 requirements. Drill collar material and process traceability are maintained from receipt of mills’ certified raw material to completion of all the manufacturing. Serial numbers are die stamped on bar bodies. Drill collar thread roots, as well as elevator recess upper radius, are cold-rolled. Cold rolling creates a compressive recess upper radius stress condition that increases fatigue life by minimizing crack initiation. All tool joint connections are phosphate-coated or copper plated to improve resistance to corrosion. Optional slip and elevator recesses to improve handling efficiency and safety are also available. 

Diameter

Bore

Tool Jint

Length

Bending Strength Ratio

Weight

in

mm

in

mm

ft

m

lb/30 ft

kg/9.14 m

3-1/8

79.4

1-1/4

31.8

NC23

30

9.14

2.57:1

622

300

3-1/2

88.9

1-1/2

38.1

NC26

30 or 31

9.14 or 9.45

2.42:1

809

367

4-1/8

104.8

2

50.8

NC31

30 or 31

9.14 or 9.45

2.43:1

1.030

476

4-3/4

120.7

2

50.8

NC35

30 or 31

9.14 or 9.45

2.58:1

1.502

681

5

127.0

2-1/4

57.2

NC38

30 or 31

9.14 or 9.45

2.38:1

1.592

722

6

152.4

2-1/4

57.2

NC44

30 or 31

9.14 or 9.45

2.49:1

2.578

1.169

6

152.4

2-13/16

71.4

NC44

30 or 31

9.14 or 9.45

2.84:1

2.328

1.056

6-1/4

158.8

2-1/4

57.2

NC44

30 or 31

9.14 or 9.45

2.91:1

2.825

1.281

Buyer Product Name Price Quantity Order Time(GMT+8)

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Verified Supplier - Dynoland International Trading Co., Ltd.
China (Mainland) | Trading Company | Contact Details
Experience:
Established 2009
Performance:
Response Rate
Company Feedback

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