Drilling method for producing borehole in e.g. earth in residential area, involves converting electric and/or hydraulic energy into mechanical energy in borehole for propulsion and driving of drilling tool

摘要

The method involves transporting a pipe section to a not lined section of a borehole (2) through an existing pipework (3) and positioning the pipe section at the not lined section of the borehole at a wall of the borehole and the existing pipework. An electric and/or hydraulic energy is converted into mechanical energy in the borehole for propulsion and driving of a drilling tool (4). The borehole is automatically produced with small propulsion speed and high-grade. The drilling mud is processed with a drilling mud treatment system (22) in the borehole. An independent claim is also included for a drilling device provided with a pipework for a borehole.