During the drilling process, oil drill collars are used to provide drilling pressure to the drill bit, keep the drill pipe in a tensile state to extend the service life of the drill pipe, and use their high rigidity to centralize the drill bit and maintain the wellbore trajectory. The outer surface and materials of the drill collars are specially treated. Spiral drill collars and non - magnetic drill collars: Three spiral grooves are equally processed on the cylindrical surface of the overall drill collar to form a spiral drill collar, which can effectively prevent differential pressure and pipe sticking. In drilling detection, non - magnetic drill collars can effectively support the signal stability of corresponding drilling monitoring equipment.

1. High torque - resistant capacity: The torque - resistant strength is 20% - 50% higher than that of API drill collars of the same specification.

2. Under the premise of ensuring torque - resistant performance: the inner diameter of the drill collar can be increased, and the outer diameter of the drill collar can be reduced.

3. High fatigue resistance, extending the service life.

4. Improve hydraulic efficiency and reduce erosion.