Deviation correcting device based on large-diameter ultra-long pile hole forming drilling machine, drilling machine and deviation correcting method

• Main Authors: LIAO WEI, AI JIAOJIAO, LEI JING, GUO GANG, LI XIAOYANG
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2021
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a deviation correcting device based on a large-diameter ultra-long pile hole forming drilling machine, the drilling machine and a deviation correcting method. In the deviation correcting device, an outer cylinder is arranged on a drill rod of the drilling machine in a non-rotating and sleeving manner; a plurality of deviation correcting units are symmetrically arranged with the drill rod as the center; a piston is movably connected with a hydraulic cavity so as to move in the direction perpendicular to the axis of the drill rod; a hydraulic control valve communicates with a hydraulic oil channel in an on-off manner; the hydraulic control valve is provided with a valve port communicating with the hydraulic oil channel; in response to a deviation correcting signal, the hydraulic control valve communicates with the hydraulic oil channel so as to pump hydraulic oil with the preset pressure into the hydraulic oil channel; and after the piston is actuated by the hydraulic oil by the preset d