Jinzhou City Shitan Machinery Equipment CO. LTD.
Jinzhou City Shitan Machinery Equipment CO. LTD.
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The Kelly Drill Rod is made of alloy steel, and the two ends are specially heat-treated to be processed into a taper small pitch thread. The shape is a regular polygon according to the drill rig's spindle, and the torque of the drill rig is passed through the drill string and finally transmitted to the drill bit at the bottom. It has the characteristics of high cost efficiency, good wear resistance and long service life.
| Kelly Parameters | |||||||||||
| SPEC | Cross Section Shape | Length Overall (m) | Pipe Body ID (mm) | Arc Slot Size (mm) | Top Thread(LH) | Bottom Thread | Surface Hardening | ||||
| Thread Pitch (Number of Thread per Inch) (mm) | Taper | Length (mm) | Thread Pitch (Number of Thread per Inch) (mm) | Taper | Length (mm) | ||||||
| Φ45×38×Φ25 | Flat Square | 4 | 25 | R6.5 | 6.35(4) | — | 43 | 2.54(10) | 1:16 | 50 | HRC45-52 |
| Φ51×46×Φ25 | Hexagon | 6 | 25 | R7 | 6.35(4) | — | 45 | 2.54(10) | 1:16 | 50 | HRC45-52 |
| Φ59×53×Φ28 | Hexagon | 4.5 | 28 | R7.75 | 2.54(10) | 1:16 | 55 | 2.54(10) | 1:16 | 55 | HRC45-52 |
| Φ59×53×Φ28 | Hexagon | 4.8 | 28 | R7 | 4.233(6) | 1:5 | 50 | 2.54(10) | 1:16 | 55 | HRC45-52 |
| Φ59×53×Φ28 | Hexagon | 6 | 28 | — | 2.54(10) | 1:16 | 55 | 2.54(10) | 1:16 | 55 | HRC45-52 |
| Φ65×55×Φ28 | Flat Square | 7 | 28 | — | 2.54(10) | 1:16 | 55 | 2.54(10) | 1:16 | 55 | HRC45-52 |
| Φ89×75×Φ45 | Flat Square | 7 | 45 | — | 3.175(8) | 1:16 | 60 | 3.175(8) | 1:16 | 60 | HRC40-45 |
| Φ89×79×Φ37 | Hexagon | 5.5 | 37 | R12 | 4.233(6) | 1:5 | 50 | 2.54(10) | 1:16 | 65 | HRC40-45 |
| Φ89×79×Φ45 | Hexagon | 6 | 45 | — | 10 | — | 85 | 10 | — | 85 | HRC40-45 |
| Φ89×79×Φ45 | Hexagon | 7 | 45 | — | 3.175(8) | 1:16 | 60 | 3.175(8) | 1:16 | 60 | HRC40-45 |
| Φ89×79×Φ45 | Hexagon | 9 | 45 | — | 3.175(8) | 1:16 | 60 | 3.175(8) | 1:16 | 60 | HRC40-45 |
| 1. The bottom thread parts quenching and tempering treatment. | |||||||||||