Drill Collar

Overview

OILTIO supplies drill collars for bottom hole assembly (BHA) weight and stiffness. The heavy-wall seamless tube base is rolled by Shandong Panjin Steel Pipe Manufacturing Co., Ltd., whose six continuous rolling lines (2 × Φ159, 2 × Φ180, 2 × Φ273) deliver 3,000,000 t/a of hot-rolled seamless pipe in the range Φ32 ~ Φ356 mm × 3.5 ~ 40 mm wall – covering standard drill collar body sizes.

Quality Basis

• Whole-process chain from steel making to pipe rolling ensures consistent alloy chemistry
• Magnetic flux leakage flaw detection (17 detector sets) plus NDT step in the standard process line
• Dimensional control better than national standard: OD deviation ≤ 0.55%
• Every pipe hydraulically tested; enterprise standard stricter than GB requirements

Applications

• Weight-on-bit provision and BHA stiffness for vertical and directional wells
• Available as bare drill collar stock or machined-to-configuration on request

Contact us for available sizes and machining options.