Inspection before use is the basis for ensuring the normal operation of the drill bit hole opener. First, check whether the blades of the hole opener have gaps or wear. If there is obvious damage on the blade edges, it will lead to uneven hole sizes during hole enlargement and even cause the drill pipe to get stuck. Second, check whether the adjustment mechanism is flexible. When turning the adjusting bolts, the blades should expand and contract smoothly without jamming. If adjustment is hindered, apply lubricating oil and clean the impurities in the adjustment parts.
Inspection after operation is equally important. After completing the hole enlargement task, promptly clean the debris on the surface of the hole opener, especially the residual impurities in the blade gaps and around the adjusting bolts. Long-term accumulation of these impurities will affect the sensitivity of the adjustment mechanism. At the same time, check whether the connecting threads of the hole opener are intact. If the threads are stripped, it will lead to loose connection with the drill pipe during the next operation, affecting drilling stability.
In addition, whether before or after use, it is necessary to check whether the overall structure of the hole opener is deformed. If bending or cracks are found in the main body of the hole opener, stop using it immediately and carry out maintenance. This avoids sudden breakage of the deformed hole opener during operation, which may cause equipment damage or personal injury.