Kellys is driving section of wohole drill stem. Kelly is available with square kelly and hexagonal kelly. TIANHE brand kelly are manufactured strictly from API Spec7-1 and SY/T6509-2000 standard.
Technical specification and parameters
Size
in |
Upper box connection |
Lower pin connection |
I.D.(mm) |
Driving section (mm) |
|
Connection (LH) |
O.D.(mm) |
Connection (LH) |
Square |
Hexagonal |
Cross flat |
For square kelly |
Cross corner for hexa kelly |
|
Std |
Optional |
Std |
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 |
146.0 |
NC31 |
104.8 |
NC26 |
85.7 |
44.4 |
31.8 |
76.2 |
100.0 |
85.7 |
|
3 1/2 |
6 5/8REG |
4 1/2REG |
196.8 |
146.0 |
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 |
146.0 |
NC46 |
158.8 |
NC38 |
120.6 |
71.4 |
57.2 |
108.0 |
141.3 |
122.2 |
|
6 5/8REG |
4 1/2REG |
196.8 |
146.0 |
NC50 |
161.9 |
NC38 |
120.6 |
71.4 |
57.2 |
108.0 |
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 |
|
