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Drilling equipment
Drill collar thick-walled (ÒÁÒ)
is designed to produce axial load onto the rock-destroying tool and to transfer torque from the rotor when drilling complex horizontal wells.
Drill collars are manufactured from alloy steels heat-treated over the full length according to ÒÓ 3663-236-07500243 -2006 ã.
Length, mm 8000…9450
| Designation of drill collar | Tool-joint thread | Outer diameter, mm | Bore diameter, mm |
|---|---|---|---|
| ÒÁÒ-89 | 3 — 102 | 89 | 52 — 57 |
| ÒÁÒ-102 | 3 — 108 | 102 | 57 — 64 |
| ÒÁÒ-114 | 3 — 122 | 114 | 71 |
| ÒÁÒ-127 | 3 — 133 | 127 | 80, 92, 102 |
| ÒÁÒ-140 | 3 — 147 | 140 | 56 — 70 |
| ÒÁÒ-168 | 3 — 171 | 168 | 102 |
Any combination of diameters and threads is possible.
Three kinds of collars are produced:
- With one central thickening;
- With two central thickenings;
- With a central thickening and spiral grooves.
