Drill Pipes

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Port: Tianjin/Qingdao
Payment Terms: delivery within3days since payment
Location: China
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Product Detail

Description:Name: Drill Collar Material: AISI 4145 H Standard: SY/T5144-1997 and API 7-1

Port:Tianjin/Qingdao

Payment Terms:L/C

Packaging Details:as your request

Product detail: 

Product Information

Name: Drill Collar

Material: AISI 4145 H

Standard: SY/T5144-1997 and API 7-1

Product Detail

The drill collar is according to SY/T5144-1997 and API 7-1 " Specification for 

Rotary  Drill  Stem  Elements"  standard,  the  material  uses  AISI  4145H  alloy 

structural steel to carry on the deep hole processing, before thread and spiral 

groove processing against the total cross-section to quenching and the tempering 

heat  treatment. After  thread  examination  qualified,  and  carries  on  cold  rolling 

processing to the thread root and the slips, reduces the thread part fatigue failure 

to increase the drill collar service life

Size

O.D

I.D

Length

Buckle type

3-1/8”

79.4mm

31.8mm

9150mm

NC23

3-1/2”

88.9mm

38.1mm

9150mm

NC26

4-1/8”

104.8mm

50.8mm

9150mm

NC31

4-3/4”

120.7mm

50.8mm

9150mm

NC38

5”

127mm

57.2mm

9150mm

NC38

6”

152.4mm

57.2mm

9150mm

NC40

6-1/4”

158.8mm

57.2mm

9150mm

NC46

6-1/4”

158.8mm

71.4mm

9150mm

NC46

6-1/2”

165.1mm

57.2mm

9150mm

NC46

6-1/2”

165.1mm

71.4mm

9150mm

NC46

6-3/4”

171.4mm

71.4mm

9150mm

NC50

7”

177.8mm

71.4mm

9150mm

NC50

7-1/4”

184.2mm

71.4mm

9150mm

NC50

7-3/4”

196.8mm

71.4mm

9150mm

NC50

8”

203.2mm

71.4mm

9150mm

NC50

8-1/4”

209.6mm

71.4mm

9150mm

6-5/8REG

 
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