When purchasing drill rods for Tapered Drilling Tools manufacturers, you should pay attention to the following aspects: strength, that is, the relationship between pipe diameter, wall thickness and steel grade; torsional stiffness becomes more important in longer drilling. Avoid drill rod winding; connection size and type; outer and inner diameter of the underground hydraulic system; and strength and applicability.
It is determined that the contractor uses S-grade drill rods, which have high strength and toughness. The new steel mixture can be heat treated, and the drill rods are harder than in previous years. Other grades of steel are mainly used for other applications, such as G grade for oil and gas drilling.
Drive contractors prefer to use universal, tested connections. These connections have a standard form or double shoulder function. The double shoulder form provides a second shoulder at the end of the pin, which increases the connection strength by approximately 30% and experiences sliding torque downhole , Helps prevent excessive torque in the connection.
Other connections can also be used, but will encounter a series of problems, such as alignment problems, maintainability of re-cutting, and the availability of cross joints, adapters or accessories. Compared to downhole hydraulic systems, connections become the focus of longer holes. When used at rock border crossing points, the hard strip can extend the life of the drill rod. Consult the supplier for the location and type of hard strips available.
When determining the value of a used drill rod, an important factor is the available space. If it is placed in a traditional area and cannot be clamped with a drill fixture, some space may be lost due to hard strips. When purchasing a used drill rod When measuring pin and box tool joints, some drill rods may not have enough space to work together.
The quality control standards of taper drills manufacturers, the quality of steel sources, and the quality of tool joints will help prevent bending and rotation fatigue, and avoid downhole failures.