Well body structure penetrating through high drainage roadway of abandoned coal mine for extraction

The utility model provides a well body structure penetrating through an abandoned coal mine high extraction roadway for extraction, which belongs to the technical field of coal bed gas exploration and development and comprises a first-opening shaft, a surface casing, a second-opening shaft, a production casing and a third-opening shaft. The point location of the primary shaft is located at the upper part of the high drainage roadway, the top is located on the ground, the bottom is located at a preset position below the bedrock, a surface casing is arranged in the primary shaft, a cement well cementation layer is arranged in an annular space between the primary shaft and the surface casing, and the cement well cementation layer returns to the ground; the top of the second-opening shaft is connected with the bottom of the first-opening shaft, the bottom of the second-opening shaft is located at the preset position of the upper portion of the high drainage roadway, a production sleeve is arranged in the second-o