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OCTG

We are committed to providing one-stop service for steel pipe products to customers around the world.

seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers

OCTG

We are committed to providing one-stop service for steel pipe products to customers around the world.

Drill Collar Suppliers,Manufacturers in china
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  • seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers
  • seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers
  • seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers
  • seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers
  • seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers
  • seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers
  • seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers
  • seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers
  • seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers
  • seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers

Drill Collar

Category : OCTG

Product: Drill Collar

Standard:API SPEC 7-1

Steel grade:AISI 4145H

Sizes:3 1/8" -- 11"

Connected Type:NC, IF, REG

  • Description
  • Specification
  • Standard
  • Process
  • Packing

API SPEC 7-1 drill collar is made with rolling or forging AISI4145H chromium molybdenum alloy steel. Therefore, it needs to control chemical composition and the content of trace elements effectively.

Drill Stabilizer


Integal Stabilizer


Standard

Number

OD
(in.)

ID
(in.)

Length
(ft)

Weight
(lb/ft)

Typical Bending
Strength Ratio

SY5144-2007/API7-1

NC 23-31

3-1/8

1-1/4

30

22

2.57:1

NC 26-35 (2-3/8 IF)

3-1/2

1-1/2

30

27

2.42:1

NC 31-41 (2-7/8 IF)

4-1/8

2

30 or 31

34

2.43:1

NC 35-47

4-3 /4

2

30 or 31

47

2.58:1

NC 38-50 (3-1/2 IF)

5

2-1/4

30 or 31

54

2.38:1

NC 44-60

6

2-1/4

30 or 31

83

2.49:1

NC 44-60

6

2-13 /16

30 or 31

76

2.84:1

NC 44-62

6-1/4

2-1/4

30 or 31

91

2.91:1

NC 46-62 (4 IF)

6-1/4

2-13 /16

30 or 31

84

2.63:1

NC 46-65 (4 IF)

6-1/2

2-1/4

30 or 31

100

2.76:1

NC 46-65 (4 IF)

6-1/2

2-13 /16

30 or 31

93

3.05:1

NC 46-67 (4 IF)

6-3 /4

2-1/4

30 or 31

109

3.18:1

NC 50-70 (4-1/2 IF)

7

2-1/4

30 or 31

118

2.54:1

NC 50-70 (4-1/2 IF)

7

2-13 /16

30 or 31

111

2.73:1

NC 50-72 (4-1/2 IF)

7-1/4

2-13 /16

30 or 31

120

3.12:1

NC 56-77

7-3 /4

2-13 /16

30 or 31

140

2.70:1

NC 56-80

8

2-13 /16

30 or 31

151

3.02:1

6-5/8 API Reg

8-1/4

2-13 /16

30 or 31

162

2.93:1

NC 61-90

9

2-13 /16

30 or 31

196

3.17:1

7-5/8 API Reg

9-1/2

3

30 or 31

217

2.81:1

NC 70-97

9-3 /4

3

30 or 31

230

2.57:1

NC 70-100

10

3

30 or 31

243

2.81:1

8-5/8 API Reg

11

3

30 or 31

300

2.84:1

Sreel Mark

Chemical Composition %

C

Si

Mn

P

S

Cr

Mo

Cu

Al

4145H

0.42~0.48

0.15~0.35

0.90~1.20

≤0.03

≤0.03

0.90~1.20

0.15~0.25

≤0.2

0.025~0.045

Other Elements:N≤0.015,Ni≤0.5


Drill Collar Mechanical Performance

Drill Collar Outside Diameter Range

Yield Strength

Tensile Strength

Elongation
A%


HB

Charpy Impact
Akv  J

mm

in

MPa

Psi

MPa

Psi

79.4~171.4

3-1/8~6-3/4

≥758

≥110000

≥965

≥140000

≥13

285~341

≥54

177.8~279.4

7~11

≥689

≥100000

≥930

≥135000

≥13

285~341

≥54

Under special conditions, the impact work of the charpy can be determined as greater than 70J according to the supply and demand

In the process of heat treatment, the drill collar has added a special normalizing process, which makes the thread part grain more refined, enhances the drill collar thread strength, and effectively improves the service life of the drill collar.



  

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