Self-heating casing string

• Main Authors: ZHANG JIACHENG, LIU WEI, YANG XIAOHUA, PU MENGLEI, HU BO, ZHAO BIN, GUO ZHIQIANG, WANG HONG, TAN JIANGHUI, LI HAO, LIU YUAN, LIN YING, LI SIYAO, WEI QINGKAI, WANG HAIBO, WU JIAHUA, JIANG YAKUN, CAO PENG, QU QISEN, ZHANG XINHAI
• Format: Patent
• Language: Chinese; English
• Published: 15.09.2020
• 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 invention provides a self-heating casing string. The self-heating casing string comprises a heating coil and at least one electric power device, a cavity is formed between the outer wall and the inner wall of the casing string, the heating coil is spirally arranged in the cavity, the electric power device is erected in the casing string in a suspended mode, the electric power device comprisesa rotating part and fixed parts, the two ends of the rotating part are connected with the fixed parts correspondingly, the fixed parts are arranged in the cavity, the fixed parts are electrically connected with the heating coil, and when liquid passes through the casing string, the rotating part is driven by the liquid to rotate and cooperates with the fixed parts to provide power supply for the heating coil. According to the self-heating casing string, through the mutual cooperation of the electric power device and the heating coil, self-heating of the casing string is realized, the supply ofexternal energy is not ne