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API SPEC 7 4142H-4145H SQUARE KELLY & HEXAGONAL DRILL PIPE

API 5DP SQUAR DRILL PIPE
  • API 5DP SQUAR DRILL PIPE
  • API 5DP SQUARE DRILL PIPE
  • API 5DP HEXAGONAL DRILL PIPE
  • API SPEC 7 4142H-4145H SQUARE KELLY & HEXAGONAL DRILL PIPE
  • API 5DP HEXAGONAL DRILL PIPE
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Product Description

Square Kelly

 

  • Based on API, Square Kelly is made from forged or rolled AISI 4142H-4145H alloy steel. It is formed by hot forged and fully heat- treated, and also by intermediate frequency induction heat treatment or 20m horizontal optical resistance furnace, which can provide high physical properties in full length. All threads are cold rolled copperized, phosphated.

Square Kelly drive section

 

 

 

 

Specification

Length for drive section

Full length

Length for drive section

Upper box connection

Low pin connection

 

Inner

Diameter

LD

standard

LD

optional

L

Standard 

L

Optional

DFL

across flate

DC

Across

corner 

DCC

Across

Concer

 

RC

Radius

 

RCC

Radius

t

wall thickness eccentric

bore

LH rotary box connection

Outer diameter

Bevel diameter

label

DLR

outer diameter

LL

length

DF

bevel

diameter

Standard

optional

DU

standard

DU

optional

LU

length

D

Standard F

D

optionalF

63.5

2 1/2

11280

 

12190

 

63.5

83.3

82.55

7.9

41.3

11.43

6 5/8

REG

41/2

REG

196.9

146.1

406.4

186.1

134.5

NC26

85.7

508

82.9

31.8

76.2

3

11280

 

12190

 

76.2

100.0

98.43

9.5

49.2

11.43

6 5/8

REG

41/2

REG

196.9

146.1

406.4

186.1

134.5

NC31

104.8

508

100.4

44.5

88.9

3 1/2

11280

 

12190

 

88.9

115.1

112.7

12.7

56.4

11.43

6 5/8

REG

41/2

REG

196.9

146.1

406.4

186.1

134.5

NC38

120.7

508

116.3

57.2

108.0

4 1/4

11280

15540

12190

16460

108.0

141.3

139.7

12.7

69.9

12.07

6 5/8

REG

41/2

REG

196.9

146.1

406.4

186.1

134.5

NC46

158.8

508

145.3

71.4

108.0

4 1/4

11280

15540

12190

16460

108.0

141.3

139.7

12.7

69.9

12.07

6 5/8

REG

41/2

REG

196.9

146.1

406.4

186.1

134.5

NC50

161.9

508

154.0

71.4

133.4

5 1/4

11280

15540

12190

16460

133.4

175.4

171.45

15.9

85.7

15.88

6 5/8

REG

 

196.9

 

406.4

186.1

 

51/2FH

177.8

508

170.7

82.6

133.4

5 1/4

11280

15540

12190

16460

133.4

175.4

171.45

15.9

85.7

15.88

6 5/8

REG

 

196.9

 

406.4

186.1

 

NC56

177.8

508

171.1

82.6

Specifications︰Kelly is made from 4145H alloy steel which is quenched and tempered at full length. The hardness is 285-341 BHN and the minimum impact value is 54J as per ASTM A370 Charpy-V. Kelly ends and drive sections, internal diameters and connections are machined and inspected according to API Spec 7. Kelly bar is inspected by ultrasonic unit. The wall thickness of each flat of the drive section is verified ultrasonically.
Product type
● Square kelly
● Hexagon kelly
Notes: Any kind of combination of hexagon kelly and left hand connection of other models and sizes is available.
● When inquiring or ordering, please specify:
 ● Kelly type (square or hexagon)
 ● Nominal size and bore diameter
 ● Overall length
 ● Connection size and type
 ● Thread protector type
Product Image

API 5DP SQUAR DRILL PIPE
API 5DP SQUAR DRILL PIPE

API 5DP SQUARE DRILL PIPE
API 5DP SQUARE DRILL PIPE

API 5DP HEXAGONAL DRILL PIPE
API 5DP HEXAGONAL DRILL PIPE


API 5DP HEXAGONAL DRILL PIPE
API 5DP HEXAGONAL DRILL PIPE

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