Maintenance Techniques for T38 Drill Pipe(drill rod)

Date: Oct. 15, 2024

T38 drill pipe is one of the commonly used types of drill pipes in mining and geological exploration, and its maintenance is crucial for extending its service life and ensuring construction safety. The following are maintenance tips for T38 drill pipe:

1. First use:
-When using a new drill pipe for the first time, the protective grease on the drill pipe threads should be wiped clean, the inner wall of the drill pipe should be cleaned with air or water, and then thread oil should be applied to the internal and external threads of the drill pipe to prevent damage to the threads or sticking.

2. Drilling operation:
-When drilling, it is advisable to ensure that the borehole is vertical as much as possible to avoid deviation or bending, in order to reduce unnecessary wear of the drill rod.
-The starting rod should be connected between the impactor and the first drill rod to prevent premature damage to the first drill rod.

3.Connection and tightening:
-Every time you connect the drill rod, be sure to apply thread oil to the threads and tighten the drill rod. Loose threaded connections can cause the threads to grind against each other, resulting in damage or sticking.
-When connecting the drill rod, ensure that the male and female joints are aligned. If they are not aligned, do not forcefully tighten them to avoid damaging the threads.

4. Inspection and Replacement:
-Regularly inspect the wear of various parts of the drill pipe. If abnormal wear is found, the cause should be identified in a timely manner and corresponding measures should be taken.
-When the scratch depth on the drill rod body exceeds 0.5mm and is in a circular state for more than one circle, it should be used with caution; When the scratch depth reaches or exceeds 0.5mm, it should be stopped from use to prevent the drill rod from breaking and causing greater losses.
-Attention should be paid to timely replacement of drill rods, including: uniform and smooth wear on the joint or outer surface of the drill rod, and when the outer diameter is less than 2mm of the standard size after wear.

5. Prevent mixing:
-Do not mix drill rods from different manufacturers, as the technical parameters, processing methods, cutting tools, and precision of the equipment used may vary, which may lead to premature wear of the threads or threads.

6. Buckling and Repair:
-When it is difficult to unscrew the drill rod, a small hammer can be used to gently vibrate the threaded part of the joint. It is strictly prohibited to use a large hammer to vigorously tap the joint to avoid thread deformation and damage.
-If local small-scale damage (about 1-2 threads, with a thread length of 10mm) is found on the drill pipe thread, it should be repaired with a file in a timely manner before use.

7. Storage and Handling:
-Drill rods should be avoided from long-term outdoor storage. Before storage, the drill rods should be wiped clean and rust proof grease should be applied to the threaded parts, and protective caps should be worn.
-When handling drill rods, avoid impact, especially to prevent damage to the male buckle.

Through the above maintenance techniques, the service life of T38 drill pipe can be effectively extended, and construction efficiency and safety can be improved.