Downward driving slurry-free bed rock mechanical drilling construction method

• Main Authors: LI ZHENNING, LIU JUNYONG, YANG HAIPENG, WANG HOUXING, ZHANG JUNQI, MA JIABIAO, NIE QINGKE, SUN YUNQING
• Format: Patent
• Language: Chinese; English
• Published: 21.08.2013
• 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 downward driving mud-free bed rock mechanical drilling construction method which comprises the following steps of (1) conducting front guide hole drilling construction by using methods that slurry is used for protecting walls, and a gas lift reverse circulation technology is used for deslagging, (2) enabling a front guide hole to be communicated with a roadway under a shaft, (3) changing drills and adopting classification slurry-free hole broadening drilling and deslagging hole broadening construction under the shaft, wherein boring mud dropped during hole broadening drilling drops into the roadway under the shaft along the front guide hole, and (4) finishing drilling construction by using the roadway under the shaft for deslagging, and using a downward-driving method for hole broadening. According to the downward driving mud-free bed rock mechanical drilling construction method, the front guide hole is firstly constructed to be communicated with the roadway under the shaft to serve