The leading drill pipe square
Given VBT meet the requirements of API specification 7 but have wider range of sizes. On customer's request can be manufactured with VBT the other sizes. Threaded connections — clutch, the nipple is performed with the discharge grooves, troughs of the threads are hardened by cold plastic deformation. Thread phosphating.
Description
Specifications
| The distance between the faces | Length | The connection of the upper coupling | Connection the bottom of the nipple |
EXT Dia |
The driving section | |||||||
| mm | inch | Thread type | EXT.dia | Type thread |
EXT. Dia. |
Width anti- the opposite side |
Width anti- the opposite angle square |
The width of the opposite corner of the six-sided | ||||
| Mill | Nestan | Mill | Nestan | |||||||||
| 63.5 | 2 1/2 | 12.19 | 6 5/8 REG | 4 1/2 REG | ∅196.8 | ∅146.0 | NC26 | ∅85.7 | ∅31.8 | 63.5 | 83.3 | </tr> |
| 76.2 | 3 | 12.19 | 6 5/8 REG | 4 1/2 REG | ∅196.8 | ∅146.0 | NC31 | ∅104.8 | ∅44.4 | 76.2 | 100.0 | 85.7 |
| 88.9 | 3 1/2 | 12.19 | 6 5/8 REG | 4 1/2 REG | ∅196.8 | ∅146.0 | NC38 | ∅120.6 | ∅57.2 | 88.9 | 115.1 | 100.8 |
| 108.0 | 4 1/4 | 12.9 | 6 5/8 REG | ∅196.8 | ∅146.0 | NC46 | ∅158.8 | ∅71.4 | 108.0 | 141.3 | 122.2 | |
| 6 5/8 REG | ∅196.8 | ∅146.0 | NC50 | ∅161.9 | ∅71.4 | 108.0 | 141.3 | 122.2 | ||||
| 133.4 | 5 1/4 | 12.9 | 6 5/8 REG | ∅196.8 | 5 1/2 FH | ∅177.8 | ∅82.6 | 133.3 | 175.4 | 151.6 | ||
| 6 5/8 REG | ∅196.8 | NC56 | ∅177.8 | ∅82.6 | 133.3 | 175.4 | 151.6 | |||||