A spiral drilling tool that is used for that major diameter shaft is salvaged, scarfing cinder

• Main Authors: XIA WENCHAO, LIU JUNYONG, YANG HAIPENG, YANG YUNAN, WANG HOUXING, SUN YUNQING, WANG QINGJUN
• Format: Patent
• Language: Chinese; English
• Published: 21.12.2016
• 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 relates to a spiral drilling tool that is used for that major diameter shaft is salvaged, scarfing cinder. Slice spiral wing board one end and drilling rod bottom fastening connection, the other end be the heliciform along the drilling rod upwards curl and with the drilling rod fastening connection, it has the hourglass cinder hole to open on the spiral wing board, spiral wing board bottom is equipped with the anti -skidding resistance strip of outstanding spiral wing face board, spiral wing board upper portion is with reinforcing plate and drilling rod wall welded fastening for strengthen the intensity of spiral wing board. Does the diameter of drilling tool confirm according to the aperture that for preventing that downthehole junk or bold from floating the cobble card and taking place the sticking of tool between drilling tool and pore wall, the drilling tool diameter generally is less than aperture 500mm during the use 600mm. The utility model discloses utilize the spiral wing board will