About What to do if the drill rod of the down-the-hole drill cannot be removed
Removal stage: operate the upper clamping cylinder, clamp the drill rod to be removed again, reverse the rotary head, loosen the connection thread with the main shaft, push the oil cylinder to lift the rotary head motor to the top of the guide rail, loosen the upper.
Removal stage: operate the upper clamping cylinder, clamp the drill rod to be removed again, reverse the rotary head, loosen the connection thread with the main shaft, push the oil cylinder to lift the rotary head motor to the top of the guide rail, loosen the upper.
To help drilling professionals and operators extend the lifespan of their drill rods, we have compiled 11 common drill rod failures and their respective solutions. Understanding these failure modes and their corrective actions will enhance drilling efficiency and reduce unnecessary replacements.
Rod connection and removal are crucial aspects of down-the-hole drill operations, directly impacting overall work efficiency and the service life of rock drilling tools. The traditional rod connection and unloading method relies on manual operation, which is not only cumbersome and labor-intensive.
Before drilling, inspect the condition and lubrication of all drill string components, including the hammer or drifter. Replace any worn out parts, following manufacturer’s recommended discard limits closely. Snake skin is a wear pattern of micro cracks that develop from drilling fatigue in.
Minor thread damage can be repaired using thread chasing tools or dies designed to restore the original thread profile. Severely damaged or worn connectors should be replaced immediately to ensure a secure and leak-proof connection. Slightly bent rods can be straightened using hydraulic or.
The collapse of the formation, reduction in diameter, or block falling from the wellbore can cause the drill pipe to get stuck. Preventive measures: Optimize drilling fluid performance (such as increasing viscosity and plugging), and control wellbore trajectory. Rock debris accumulation (sand.
To solve the problem, we first need to know why it happens. The most common reasons rods get stuck are: Differential sticking: When fluid from the ground pushes the rod against the borehole wall. Clay swelling or sand collapse: Soils like kaolin can swell or fall in, trapping the rod. Hole caving.
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