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Product Details
Kelly
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Product Description

Kelly is the downhole driving part of the whole drill string. Our company can provide square drill pipe and hexagonal drill pipe according to the requirements of users. They are made of AISI 4142h-4145h forged or precision rolled alloy structural   steel, and are subject   to quenching and reheating   heat   treatment   process within   the full   length. After   such   heat treatment   process, its Brinell hardness can reach 285 341, Charpy impact energy   ≥ 54j, and the   developed process can ensure that the eccentricity of the hole reaches the standard minimum wall thickness value, The manufacturing process of Kelly is in accordance with API spec7-1 specification and SY/T6509-2000 standard.


Product Parameters


Size(in)

Upper female joint

Lower male connector

I.D.mm

Drive part

Thread Type LH

O.D.mm

Thread Type

Square

Hexagonal

Width of opposite side

Square diagonal width

Hexagonal diagonal width

Standard

Optional

Standard

Optional

Square

O.D. mm

Hexagonal

O.D. mm

2 1/2

6 5/8REG

4 1/2REG

196.8

146.0

NC26

85.7



31.8


63.5

83.3


3

6 5/8REG

4 1/2REG

196.8

146

NC31

104.8

NC26

85.7

44.4

31.8

76.2

100

85.7

3 1/2

6 5/8REG

4 1/2REG

196.8

146

NC38

120.6

NC31

104.8

57.2

44.4

88.9

115.1

100.8

4 1/4

6 5/8REG

4 1/2REG

196.8

146

NC46

158.8

NC38

120.6

71.4

57.2

108

141.3

122.2

6 5/8REG

4 1/2REG

196.8

146

NC50

161.9

NC38

120.6

71.4

57.2

108

141.3

122.2

5 1/4

6 5/8REG


196.8


5 1/2FH

177.8

NC46

158.8

82.6

76.2

133.3

175.4

151.6

6 5/8REG


196.8


NC56

177.8

NC50

161.9

82.6

82.6

133.3

175.4

151.6

6

6 5/8REG


196.8




5 1/2FH

177.8


88.9

152.4


173

6 5/8REG


196.8




NC56

177.8


88.9

152.4


173