| 摘要 |
A self-driven casing pipe lowering device, comprising, sequentially connected from top to bottom, a turbine assembly (1), a drive shaft (4) driven to rotate by the turbine assembly, a drill bit (5) driven by the drive shaft and installed with a blade edge (6) for rotation and reaming, and a bearing assembly (3) installed on the drive shaft. The top portion of the casing pipe lowering device employs the turbine structure, and water enters the turbine to generate a torque so as to drive the drill bit at the bottom to rotate for reaming, such that the casing pipe can be quickly lowered to a predetermined position, thus shortening construction time, and increasing economic benefit. |
