Development and Application of the special drilling rig for oblique guide hole

Abstract

For the construction conditions of long-distance inclined drilling in roadway or chamber, a new type of self-moving hydraulic top-drive drilling rig is developed independently. Follow the research steps of the overall design, the key-parts design, the hydraulic system design, the industrial test. The main functional organization of the oblique-guide-hole drilling machine includes the power head, the feeding device, the power source, the drill pipe delivery installation, the rig control system, the hydraulic transmission system. The special oblique-guide-hole drilling rig realizes the construction requirement of any inclined drilling of 0∼90°, at the same time, it can meet the technical requirements of the directional drilling assembly, that is the combination of down-hole motor, non-magnetic drill collar and Wireless while drilling. The track of long-distance oblique drilling is precisely controlled. The field test of the special oblique-guide-hole drilling rig is at Changlongshan Pumped Storage Power Station in Zhejiang, China. The actual guide hole has an inclined length of 289.5m, and the deviation slope of the borehole is controlled within 2.86‰. It is successfully completed the anti-shaft guide hole in the lower section of the 1# diversion system high-pressure pipeline safely, quickly, and efficiently.