Overflowing type coring pipe

The invention relates to the technical field of drilling and coring devices, in particular to an overflowing type coring pipe, which is characterized in that a plurality of overflowing pipes are arranged in a conventional coring pipe, and the overflowing pipes are respectively provided with an upper opening and a lower opening at the upper end and the lower end of the coring pipe; the lower opening is formed in the upper side of the connecting position of the coring pipe and the drill bit. When the overflowing type coring pipe is used, cooling liquid enters the overflowing type coring pipe from the upper opening, flows through the overflowing pipe on the pipe wall of the coring pipe and finally flows out of the lower opening to cool the screwed-in drill bit, in this way, the drill bit is fully cooled in the screwing-in process, and in the process, the cooling liquid does not pollute soil in the middle of the coring pipe; the method has very important practical significance for geological research. 本申请涉及钻井取芯装置