Connecting structure of drill rod for geological prospecting

• Main Authors: BAO XINYI, SU GANG, YAO FENGLEI
• Format: Patent
• Language: English
• Published: 04.02.2015
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model relates to a connecting structure of a drill rod for geological prospecting. The connecting structure of the drill rod for geological prospecting comprises an inner pipe and a nipple which are used for connecting two adjacent short pipes, wherein the connecting end of the nipple is arranged in the inner pipe and is in screwed connection with the inner pipe, a buckling protruding edge is arranged on the side face of the end of the inner pipe, the outer side of the end of the buckling protruding edge is provided with a protrusion, the end of the nipple is provided with a buckling groove which is in clamping connection with the buckling protruding edge, the inner side face of the buckling groove is provided with a clamping groove used in cooperation with the protrusion, the buckling protruding edge is arranged in the spiral direction of the inner pipe, the buckling groove is provided with an arc-shaped guide face, and when the inner pipe and the nipple are in screwed connection to the root portion of threads, the buckling protruding edge is screwed into the buckling groove along the arc-shaped guide face. According to the connecting structure of the drill rod for geological prospecting, the inner pipe and the nipple are fixed in the screwed connection mode, so that relative rotation between the inner pipe and the nipple is avoided when the drill rod rotates at a high speed; because the inner pipe and the nipple are locked through cooperation between the buckling protruding edge and the buckling groove, the phenomenon that screwed connection loosens after a long time is avoided, the repair cycle and the replacement cycle are prolonged, and the working stability and the working efficiency of the drill rod are improved.