Hexagonal Kelly
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
|
（2½）
|
11280
|
|
12190
|
|
63.5
|
83.3
|
82.55
|
7.9
|
41.3
|
11.43
|
（65/8）REG
|
(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
|
（65/8）REG
|
(4½)
REG
|
196.9
|
146.1
|
406.4
|
186.1
|
134.5
|
NC31
(27/8IF)
|
104.8
|
508
|
100.4
|
44.5
|
|
88.9
|
（3½）
|
11280
|
|
12190
|
|
88.9
|
115.1
|
112.7
|
12.7
|
56.4
|
11.43
|
（65/8）REG
|
(4½)
REG
|
196.9
|
146.1
|
406.4
|
186.1
|
134.5
|
NC38
(3½IF)
|
120.7
|
508
|
116.3
|
57.2
|
|
108
|
（4¼）
|
11280
|
15540
|
12190
|
16460
|
108
|
141.3
|
139.7
|
12.7
|
69.9
|
12.07
|
（65/8）REG
|
(4½)
REG
|
196.9
|
146.1
|
406.4
|
186.1
|
134.5
|
NC46
(4IF)
|
158.8
|
508
|
145.3
|
71.4
|
|
108
|
（4¼）
|
11280
|
15540
|
12190
|
16460
|
108
|
141.3
|
139.7
|
12.7
|
69.9
|
12.07
|
（65/8）REG
|
(4½)
REG
|
196.9
|
146.1
|
406.4
|
186.1
|
134.5
|
NC50
(4½IF)
|
161.9
|
508
|
154
|
71.4
|
|
133.4
|
（5¼）
|
11280
|
15540
|
12190
|
16460
|
133.4
|
175.4
|
171.45
|
15.9
|
85.7
|
15.88
|
（65/8）REG
|
|
196.9
|
|
406.4
|
186.1
|
|
5½FH
|
177.8
|
508
|
170.7
|
82.6
|
|
133.4
|
（5¼）
|
11280
|
15540
|
12190
|
16460
|
133.4
|
175.4
|
171.45
|
15.9
|
85.7
|
15.88
|
（65/8）REG
|
|
196.9
|
|
406.4
|
186.1
|
|
NC56
|
177.8
|
508
|
170.7
|
82.6
|
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