Drill Collar
Drill Collar
Drill collar can supply the drill bit and increase the rigidity of drill string. Dril collar are manufactured strictly according to API Spec7-1 standard with material of AISI 4145 Mod. We supply slick drill collars, spiral drill collars, etc. The size of drill collar we can provide is from 3.1/8 to 11 inches. We can also provide other drill collars at customers’ specific request .
➣ First class equipment could guarantee the whole process flow and the clave process be more efficient like heat treating and friction welding.
➣ Meet the international requirement of the API 5DP, API 7G, & ISO 9001;
➣ Advanced and strict inspection instruments could guarantee the high quality product with a more stable performance.
Specification
| Item | Name | Spiral or Slick | O.D | I.D | Tool joint | Bevel diameter in | Material | Overall length | |
| in | in | Connection | ft | ||||||
| 1 | Drill collar | Slick or Spiral | 3.1/8 | 1.1/4 | NC26 | 2.3/8″IF | 3 | 4145H | 30 or 31 |
| 2 | Drill collar | Slick or Spiral | 3.1/2 | 1.1/2 | NC26 | 2.3/8″IF | 4145H | 30 or 31 | |
| 3 | Drill collar | Slick or Spiral | 4.1/8 | 2 | NC31-41 | 2.7/8″IF | 3.61/64 | 4145H | 30 or 31 |
| 4 | Drill collar | Slick or Spiral | 4.3/4 | 2 | NC35-47 | 4.33/64 | 4145H | 30 or 31 | |
| 5 | Drill collar | Slick or Spiral | 5 | 2.1/4 | NC38-50 | 3.1/2″IF | 4.49/64 | 4145H | 30 or 31 |
| 6 | Drill collar | Slick or Spiral | 6 | 2.1/4 | NC44-60 | 5.11/16 | 4145H | 30 or 31 | |
| 7 | Drill collar | Slick or Spiral | 6 | 2.13/16 | NC44-60 | 5.11/16 | 4145H | 30 or 31 | |
| 8 | Drill collar | Slick or Spiral | 6.1/4 | 2.1/4 | NC44-62 | 5.7/8 | 4145H | 30 or 31 | |
| 9 | Drill collar | Slick or Spiral | 6.1/4 | 2.13/16 | NC46-62 | 4″IF | 5.29/32 | 4145H | 30 or 31 |
| 10 | Drill collar | Slick or Spiral | 6.1/2 | 2.1/4 | NC46-65 | 4″IF | 6.3/32 | 4145H | 30 or 31 |
| 11 | Drill collar | Slick or Spiral | 6.1/2 | 2.13/16 | NC46-65 | 4″IF | 6.3/32 | 4145H | 30 or 31 |
| 12 | Drill collar | Slick or Spiral | 6.3/4 | 2.1/4 | NC46-67 | 4″IF | 6.9/32 | 4145H | 30 or 31 |
| 13 | Drill collar | Slick or Spiral | 7 | 2.1/4 | NC50-70 | 4.1/2″IF | 6.31/64 | 4145H | 30 or 31 |
| 14 | Drill collar | Slick or Spiral | 7 | 2.13/16 | NC50-70 | 4.1/2″IF | 6.31/64 | 4145H | 30 or 31 |
| 15 | Drill collar | Slick or Spiral | 7.1/4 | 2.13/16 | NC50-72 | 4.1/2″IF | 6.43/64 | 4145H | 30 or 31 |
| 16 | Drill collar | Slick or Spiral | 7.3/4 | 2.13/16 | NC56-77 | 7.19/64 | 4145H | 30 or 31 | |
| 17 | Drill collar | Slick or Spiral | 8 | 2.13/16 | NC56-80 | 7.31/64 | 4145H | 30 or 31 | |
| 18 | Drill collar | Slick or Spiral | 8.1/4 | 2.13/16 | 6.5/8″REG | 7.45/64 | 4145H | 30 or 31 | |
| 19 | Drill collar | Slick or Spiral | 9 | 2.13/16 | NC61-90 | 8.3/8 | 4145H | 30 or 31 | |
| 20 | Drill collar | Slick or Spiral | 9.1/2 | 3 | 7.5/8″REG | 8.13/16 | 4145H | 30 or 31 | |
| 21 | Drill collar | Slick or Spiral | 9.3/4 | 3 | NC70-97 | 9.5/32 | 4145H | 30 or 31 | |
| 22 | Drill collar | Slick or Spiral | 10 | 3 | NC70-100 | 9.11/32 | 4145H | 30 or 31 | |
| 23 | Drill collar | Slick or Spiral | 11 | 3 | 8.5/8″REG | 10.1/2 | 4145H | 30 or 31 | |
