What to do if the drill pipe of the drilling machine is too tight and difficult to unload？

When disassembling drill pipes, first use a vice for routine disassembly. After clamping 2-4 drill rods, the tiger teeth should be checked for wear. If they are worn, the tiger teeth should be replaced in a timely manner.

When the drill pipe is particularly difficult to disassemble, that is, when the drill pipe is clamped by the vise more than twice and there is excessive wear on the surface of the clamped part of the drill pipe, the disassembly should be stopped. The internal tiger tooth block method should be used to increase the clamping force of the vise, or oxygen acetylene flame can be used to bake the threaded connection of the drill pipe, or a hammer can be used to vibrate the threaded connection of the drill pipe for disassembly.