Main / Business and cooperation / Products catalogue / Oil and special equipment / Drilling equipment / Drill collar, balanced (ÓÁÒÑ)
Drilling equipment
Drill collar, balanced (ÓÁÒÑ)
is intended to produce axial load onto the drill bit and to increase rigidity of the drill string.
Drill collars are manufactured from alloy steels heat-treated over the full length according to ÒÓ 3663-033-48416997-2005 ã
Length, mm 6000…9450
| Designation of drill collar | Tool-joint thread | Outer diameter, mm | Bore diameter, mm |
|---|---|---|---|
| ÓÁÒÑ-89 | 3 — 73 | 89 | 38 |
| ÓÁÒÑ-108 | 3 — 86 | 108 | 46 — 56 |
| ÓÁÒÑ-121 | 3 — 102 | 121 | 50 — 56 |
| ÓÁÒÑ-146 | 3 — 121 3 — 122 | 146 | 56 — 70 |
| ÓÁÒÑ-165 | 3 — 122 | 165 | 56 — 70 |
| ÓÁÒÑ-178 | 3 — 147 3 — 133 | 178 | 70 — 90 |
| ÓÁÒÑ-203 | 3 — 171 3 — 147 | 203 | 80 — 100 |
| ÓÁÒÑ-229 | 3 — 171 | 229 | 90 — 100 |
| ÓÁÒÑ-254 | Ç — 171 | 254 | 90 — 100 |
Three kinds of collars are produced:
- À — Smooth without grooves;
- Á — With grooves for elevator and power slips;
- Ë — With grooves for elevator.
