DEVICE FOR DRILLING WELLS WITHOUT EXCAVATION Russian patent published in 2018 - IPC E21B11/02 

FIELD: construction.

SUBSTANCE: invention relates to construction, and more particularly to devices for drilling wells without excavation, and can be used for drilling down and horizontal wells and trenchless laying of utilities under the ground, in particular under roads, water reservoirs, buildings. Main technical result of the claimed invention is to increase the reliability of the device during its operation. Reliable construction of the tubular sliding-fit carriage with a seal on the housing and placement of heels on the carriage increases the reliability of the device by reducing the risk of well soil penetration into the housing of the device and jamming of the moving parts of the device. Running hydraulic cylinder, located along the axis of the device, in combination with spacer cylinders, providing radial movement of the heels, make it possible to create large, radial and longitudinal forces and increase the reliability of the device moving in the ground.

EFFECT: technical result is achieved due to the use of a reliable carriage structure in the well drilling device, which is a solid tube with a sliding fit and a seal between the housing of the device and the carriage that is movable along the surface of the device housing along its axis, and due to a reliable design of the drive mechanism of the device.

4 cl, 3 dwg