A high -pressure injection slip casting combination drilling tool for holing dado

• Main Authors: LI JUNPING, ZHANG TONGDE, WU JINSHENG, DENG WEI, HU LI
• Format: Patent
• Language: English
• Published: 16.12.2015
• 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 utility model discloses a high -pressure injection slip casting combination drilling tool for holing dado. Reinforce the pore wall and less, the conventional high -pressure injection drilling tool of induration diameter easily appears use limited scheduling problem in the bad ground for solving ordinary water injection mud, the utility model provides a high -pressure injection slip casting combination drilling tool includes the steel body 1 and drill bit 2, and the drilling tool steel body 1 links to each other with drill bit 2 through lower clutch 1 -3, sets up water supply mud spun jet orifice 1 -7 on the drilling tool steel body 1, and the inside of the drilling tool steel body 1 sets up high -pressure injection adjustment mechanism, and the circulation is swept the hole and is adjusted the switching with these two kinds of different mode of grout injection to mud. The utility model provides a high -pressure injection slip casting combination drilling tool through adjusting the switching that slush pump discharge capacity and then control pumping pressure (regulating piston end cap stroke) were swept the hole and was sprayed the different construction operations of slip casting, can effectively avoid the grout to stop up the drilling rod accident, and the pore wall that can extensively be applicable to loose broken formation is reinforced.