Description

Kelly
Kelly is used to connect the topmost joint of drill pipe for drill stem turning when the rotary table runs.
Jereh Drilltech supplies both square kelly and hexagonal kelly.

Technical Specification of Kelly

Kelly Size

Length Mm

Upper box connection

Lower pin connection

ID

Driving section

mm

in

Type(LH)

O.D.

Cross flat

For square

Cross corner for hex

Std

optional

Std

optional

thread

OD

63.5

2-1/2

12.19

6-5/8REG

4-1/2REG

196.8

146


85.7

31.8

63.5

83.3


76.2

3

12.19

6-5/8REG

4-1/2REG

196.8

146

NC26

104.8

44.4

76.2

100

85.7

88.9

3-1/2

12.19

6-5/8REG

4-1/2REG

196.8

146

NC31

120.6

57.2

88.9

115.1

100.8

108

4-1/4

12.9

6-5/8REG

4-1/2REG

196.8

146

NC38

158.8

71.4

108

141.3

122.2

NC38

161.9

71.4

108

141.3

122.2

133.4

5-1/4

12.9

6-5/8REG

4-1/2REG

196.8

146

NC46

177.8

82.6

133.3

175.4

151.6

NC50

177.8

82.6

133.3

175.4

151.6

152.4

6

12.9

6-5/8REG


196.8

146

5-1/2FH



152.4


173

NC56



152.4


173

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