Hydraulic fracturing well body structure of coal-bed gas well

• Main Authors: WANG CHUNHUI, YANG YIHAO, JIN HUAXIAN, LI PENGYU, BAI YANG, GUO CHEN, GUO ZHENYU, HUANG FAN, YAO CHUNHUI, YANG YANQING, HOU PEI, SHEN PENGLEI, YUN JIAN, XIN KAI, CHANG HUIZHEN, WEI RUOFEI
• Format: Patent
• Language: Chinese; English
• Published: 24.01.2023
• 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; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The utility model belongs to the technical field of coal-bed gas exploitation, and particularly relates to a hydraulic fracturing well body structure of a coal-bed gas well. A coal-bed gas well is a straight well, a plugging structure is arranged below a transformation target coal seam and above a main coal mining layer in the coal-bed gas well, a flame arrester and a one-way valve are installed on a wellhead of the coal-bed gas well and then connected with a ground extraction pipeline, and a perforating gun is tripped into the transformation target coal seam through a cable from the wellhead of the coal-bed gas well. The perforating gun sequentially comprises a lower joint, a lower-section gun body, a gun joint, an upper-section gun body, an upper joint, a positioning instrument and a cable joint from bottom to top; according to the method, a coal bed gas vertical well close to scrap in a working face which is in mining under a well is transformed and reutilized, the portion below a transformed target coal b