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 |
