DRILLING DEVICE FOR USE ESPECIALLY DURING DIRECTIONAL DRILLING FOR RECOVERY OF GEOTHERMAL ENERGY

摘要

A drilling device with a drilling derrick above a base structure 2, wherein the drilling derrick 1 is provided with a winch 13 and a snatch block (14) for lifting and lowering a drilling machinery 7 connected to the surface via three or more flexible hoses and a centrally disposed hoisting wire with integrated electric and fibre cables 3. The drilling machinery 7 is assembled from a drill bit 18 connected to a drilling motor and gear 20 via a stabilizer 19. The drilling motor and gear are connected, in turn, to a directional control 21 and further, via the intermediate sub (22), to a rolling anchor connected to the swivel connection 25. Drill collars are disposed above the swivel 25 in order to control the weight on the drill bit 18.