Drill Collar
Hejian Deris can supply Non-magnetic Drill Collar, Spiral Drill Collar, and Slick Drill Collar as per customers` requirements. Designed and manufactured strictly according to API Spec 7-1.
Drill Collars are one of the parts of a drill`s string. Drill for the Collars is meant to provide weight for drilling purposes. The Drill Collars are thick walled tube like pieces that are machined from solid steel bars, although they are often made from plain carbon steel or the non magnetic alloy of copper and steel or other premium alloys that are non magnetic in nature. Drill collar has bars of solid steel that are drilled from one end to the other to provide a passage for pumping the drilling fluids through the collar.
Main Technical Parameters
| Drill Collar Thread
| OD | ID | Length | | ||
| | ||||||
| | ||||||
| mm | in | mm | in | mm | | |
| NC31-41(27/8IF) | 104.8 | 4 1/8 | 50.8 | 2 | 9150 | |
| NC35-47 | 120.7 | 4 3/4 | 50.8 | 2 | 9150 | |
| NC38-50(31/2IF) | 127 | 5 | 57.2 | 2 1/4 | 9150 | |
| NC44-60 | 152.4 | 6 | 57.2 | 2 1/4 | 9150or9450 | |
| NC44-60 | 152.4 | 6 | 71.4 | 2 13/16 | 9150or9450 | |
| NC44-62 | 158.8 | 6 1/4 | 57.2 | 2 1/4 | 9150or9450 | |
| NC46-62(4IF) | 158.8 | 6 1/4 | 71.4 | 2 13/16 | 9150or9450 | |
| NC46-65(4IF) | 165.1 | 6 1/2 | 57.2 | 2 1/4 | 9150or9450 | |
| NC46-65(4IF) | 165.1 | 6 1/2 | 71.4 | 2 13/16 | 9150or9450 | |
| NC46-67(4IF) | 171.4 | 6 3/4 | 57.2 | 2 1/4 | 9150or9450 | |
| NC50-67(41/2IF) | 171.4 | 6 3/4 | 71.4 | 2 13/16 | 9150or9450 | |
| NC50-70(41/2IF) | 177.8 | 7 | 57.2 | 2 1/4 | 9150or9450 | |
| NC50-70(41/2IF) | 177.8 | 7 | 71.4 | 2 13/16 | 9150or9450 | |
| NC50-72(41/2IF) | 184.2 | 7 1/4 | 71.4 | 2 13/16 | 9150or9450 | |
| NC56-77 | 196.8 | 7 1/4 | 71.4 | 2 13/16 | 9150or9450 | |
| NC56-80 | 203.2 | 8 | 71.4 | 2 13/16 | 9150or9450 | |
| 65/xREG | 209.6 | 8 1/4 | 71.4 | 2 13/16 | 9150or9450 | |
| NC61-90 | 228.6 | 9 | 71.4 | 2 13/16 | 9150or9450 | |
