Instructions for using threaded drill rod


In order to use the threaded drill rod normally and ensure the normal failure mode (thread wear, fatigue fracture), the following points must be paid attention to:

1. Confirm that the drill rod thread and the connecting sleeve are well matched (preferably provided by the same manufacturer); the specification (drill rod diameter) matches: large specifications are matched with high impact power rock drills, and small specifications are matched with small impact power rock drills, otherwise early fracture;

2. Check the thread wear, if it is serious, it should be scrapped in time, so as not to cause breakage during drilling and cause greater losses;

3. Check the bending of the drill rod. If it is serious, stop using it (you can use it after straightening);

4. Be stable when opening the hole, and reduce the working pressure parameters to avoid accidental damage;

5. The working parameters should be adjusted in time according to the rock conditions and drill bit conditions. Since there is a certain gap between the quality of domestic drill rods and foreign top-level products, the working parameters should be adjusted down appropriately: when the drilling slag is compensated, the drill bit should be replaced in time to improve the working efficiency of the drill rod; when the rock is soft, the impact pressure and propulsion force should be reduced to prolong the service life of the drill rod.

6. Select the correct working parameters of the rock drill: For a rock drill with adjustable parameters (impact pressure, impact power, impact frequency, propulsion, rotation speed), it should be ensured that the large impact energy corresponds to the large-size drill rod, and the small impact energy corresponds to the small-size drill rod. Rod, otherwise it is easy to cause early fracture and failure of the drill rod;

7. It is recommended to use fast drill rod (MF drill rod) instead of conventional rod drill rod to improve drilling efficiency;

8. In case of early fracture (small thread wear), please notify our company in writing in time, so as to deal with it in time.

Notification categories mainly include:

1) The type of rock drill used, the actual working parameters (impact pressure, impact power, impact frequency, thrust, rotation speed);

2) The trolley model used;

3) Rock type and hardness, construction site (open-air, underground, other), drilling depth, drilling method (excavation drilling, production drilling, horizontal, downward, upward, fan, etc);

4) The manufacturer, specifications and usage of drill bits, drill tails and connecting sleeves used with drill rods;

5) Statistics on drill rod fracture:

A. Broken part, service life, thread wear condition (serious, slight, no wear), quantity;

B. Planned average life expectancy;

C. The average service life and failure mode of other manufacturers under similar rock drilling conditions.

drill rod

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