Quick connecting device for lifting and putting down oil pipe

• Main Authors: YAN DEXI, ZHANG XUNFENG, WU JUN, SONG XIANLONG, GAO SHUHUA
• Format: Patent
• Language: Chinese; English
• Published: 26.02.2014
• 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

According to a quick connecting device for lifting and putting down an oil pipe, a hanging ring, a connecting rod and a cone are connected into a whole. Conical internal threads are arranged at the upper portion of the oil pipe, and conical external threads of an elastic buckling clamp are matched with the conical internal threads at the upper portion of the oil pipe. The conical external threads of the elastic buckling clamp are milled open to form strip bodies, and the lower inner portion of the elastic buckling clamp is provided with a conical hole. An outer conical surface of the cone is matched with the conical hole, and the connecting rod and the cone penetrate through the elastic buckling clamp. After the strip bodies formed by milling open the lower portion of the elastic buckling clamp contract, the elastic buckling clamp is placed into the internal threads at the upper portion of the oil pipe. When the strip bodies formed by milling open the lower portion of the elastic buckling clamp expand, the el