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Hexagonal Kelly buy in China
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Hexagonal Kelly

Hexagonal Kelly

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USA, China
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Technical characteristics
  • BrandFD
  • Country of manufactureChina
Description

Kelly is located in the top of the drill string, with square and hexagonal. In rotary drilling, when it is drilling, kelly connected with square bushing and rotary bushing, transfer the ground rotary torque to Heavy Weight Drill Pipe  and to drive the drill bit, bearing the weight of the drill string. In the drilling of the turbine and screw, the weight of the drill string and the counter torque are supported.

We are a square Kelly manufacturer  in China, our company has 2 sucker rod workshops, 3 production lines. We guarantee on - time delivery, No middleman!

Square Kelly Specification:

Specification

Drive part length

Overall length

Drive part

Upper internal threaded joint

Lower external threaded joint

Inner diameter

Standard
LD

Selection
LD

Standard 

Selection

Square size
DFL

Across corner
DC

Across corner
DCC

Radius
RC

Radius
RCC

Eccentric hole minimum wall thickness

Screw thread specification and left rotate type

Outside diameter

Chamfering diameter

Thread specification and type

Outside diameter
DLR

Length
LL

Chamfering diameter
DF

Standard

Selection

Standard

Selection DU

length LU

Standard DF

Selection DF

63.5

11280

 

12190

 

63.5

83.3

82.55

7.9

41.3

11.43

65/8REG

(4½)
REG

196.9

146.1

406.4

186.1

134.5

NC26
(23/8IF)

85.7

508

82.9

31.8

76.2

3

11280

 

12190

 

76.2

100

98.43

9.5

49.2

11.43

65/8REG

(4½)
REG

196.9

146.1

406.4

186.1

134.5

NC31
(27/8IF)

104.8

508

100.4

44.5

88.9

11280

 

12190

 

88.9

115.1

112.7

12.7

56.4

11.43

65/8REG

(4½)
REG

196.9

146.1

406.4

186.1

134.5

NC38
(3½IF)

120.7

508

116.3

57.2

108

11280

15540

12190

16460

108

141.3

139.7

12.7

69.9

12.07

65/8REG

(4½)
REG

196.9

146.1

406.4

186.1

134.5

NC46
(4IF)

158.8

508

145.3

71.4

108

11280

15540

12190

16460

108

141.3

139.7

12.7

69.9

12.07

65/8REG

(4½)
REG

196.9

146.1

406.4

186.1

134.5

NC50
(4½IF)

161.9

508

154

71.4

133.4

11280

15540

12190

16460

133.4

175.4

171.45

15.9

85.7

15.88

65/8REG

 

196.9

 

406.4

186.1

 

5½FH

177.8

508

170.7

82.6

133.4

11280

15540

12190

16460

133.4

175.4

171.45

15.9

85.7

15.88

65/8REG

 

196.9

 

406.4

186.1

 

NC56

177.8

508

170.7

82.6

Hexagonal Kelly Specification mmin):

Specification

Drive part lengthти длины

Overall length

Drive part

Upper internal threaded joint

Lower external threaded joint

Inner diameter

Standard
LD

Selection
LD

Standard

Selection

Square size
DFL

Across corner
DC

Across corner
DCC

Radius
RC

Radius
RCC

Eccentric hole minimum wall thickness

Screw thread specification and left rotate type

Outside diameter

Chamfering diameter

Thread specification and type

Outside diameter
DLR

Length
LL

Chamfering diameter
DF

Standard

Selection

Standard DC

Selection DU

length LU

Standard DF

Selection DF

63.5

11280

 

12190

 

76.2

85.7

85.73

6.4

42.9

12.1

65/8REG

(4½)
REG

196.9

146.1

406.4

186.1

134.5

NC26
(23/8IF)

85.7

508

82.9

31.8

76.2

3

11280

 

12190

 

88.9

100.8

100

6.4

50

13.3

65/8REG

(4½)
REG

196.9

146.1

406.4

186.1

134.5

NC31
(27/8IF)

104.8

508

100.4

44.5

88.9

11280

15540

12190

16460

108

122.2

121.44

9.9

60.7

15.9

65/8REG

(4½)
REG

196.9

146.1

406.4

186.1

134.5

NC38
(3½IF)

120.7

508

116.3

57.2

108

11280

15540

12190

16460

133.4

151.6

149.86

9.5

75

15.9

65/8REG

-

196.9

-

406.4

186.1

-

NC46
(4IF)

158.8

508

145.3

71.4

108

11280

15540

12190

16460

133.4

151.6

149.86

9.5

75

15.9

65/8REG

-

196.9

-

406.4

186.1

-

NC50
(4½IF)

161.9

508

154

71.4

133.4

11280

15540

12190

16460

152.4

173

173.02

9.5

86.5

15.9

65/8REG

-

196.9

-

406.4

186.1

-

5½FH

177.8

508

170.7

82.6

133.4

11280

15540

12190

16460

152.4

173

173.02

9.5

86.5

15.9

65/8REG

-

196.9

-

406.4

186.1

-

NC56

177.8

508

170.1

82.6

 

Steel Mark

Chemical Composition%

C

Si

Mn

P

S

Cr

Mo

Cu

Al

4145H

0.420.48

0.150.35

0.901.20

≤0.03

≤0.03

0.901.20

0.150.25

≤0.2

0.0250.045

Other ElementsN≤0.015Ni≤0.5

Mechanical Property:

Mechanical Property

Outside Diameter Range

Yield Strength

Tensile Strength

Elongation
A%


HB

Charpy impact 
Akv J

mm

in

MPa

Psi

MPa

Psi

79.4171.4

3 - 1/86 - 3/4

≥758

≥110000

≥965

≥140000

≥13

285341

≥54

177.8

7

≥689

≥100000

≥930

≥135000

≥13

285341

≥54

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

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