Dongying Lake Petroleum Technology Co.,Ltd
Global oilfield equipment supply
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square kellys
Kellys is driving section of wohole drill stem. Kelly is available with square kelly and hexagonal kelly. LAKE brand kelly are manufactured strictly from API Spec7-1 and SY/T6509-2000 standard.
Technical specification and parameters
| Size |
Length in |
Upper box connection | Lower pin connection | I.D. | Driving section | |||||||
| mm | in | Type(LH) | O.D. | Thread | O.D. | Cross flat | For square kelly | Cross corner for hexa kelly | ||||
| Std | optional | Std | optional | |||||||||
| 63.5 | 2 1/2 | 12.19 | 6 5/8REG | 4 1/2REG | 196.8 | 146.0 | NC26 | 85.7 | 31.8 | 63.5 | 83.3 | |
| 76.2 | 3 | 12.19 | 6 5/8REG | 4 1/2REG | 196.8 | 146.0 | NC31 | 104.8 | 44.4 | 76.2 | 100.0 | 85.7 |
| 88.9 | 3 1/2 | 12.19 | 6 5/8REG | 4 1/2REG | 196.8 | 146.0 | NC38 | 120.6 | 57.2 | 88.9 | 115.1 | 100.8 |
| 108.0 | 4 1/4 | 12.9 | 6 5/8REG | 4 1/2REG | 196.8 | 146.0 | NC46 | 158.8 | 71.4 | 108.0 | 141.3 | 122.2 |
| 6 5/8REG | 4 1/2REG | 196.8 | 146.0 | NC50 | 161.9 | 71.4 | 108.0 | 141.3 | 122.2 | |||
| 133.4 | 5 1/4 | 12.9 | 6 5/8REG | 196.8 | 5 1/2FH | 177.8 | 82.6 | 133.3 | 175.4 | 151.6 | ||
| 6 5/8REG | 196.8 | NC56 | 177.8 | 82.6 | 133.3 | 175.4 | 151.6 | |||||
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