The utility model has the characteristics that the PDC drill bit can effectively enlarge the bore hole when stuck, easily pull the drill-bit drilling tool out, avoid the drill sticking accident, can be shaped by processing at one time, is less in processing working procedures, less in difficulty, good in quality, high in speed of pulling-out of the drill-bit drilling tool, high in efficiency, low in cost and the like, and can be widely applied to geologic exploration, oil drilling and other similar places. The utility model relates to a PDC drill bit with back-reaming cutting teeth, which comprises an upper body and a lower body, wherein a connecting thread is arranged at the outer end of the upper body, blades and cutting teeth are distributed on the lower body, and spray holes with a straight hole section at the upper part and a radially inclined lower part are respectively formed in the centers of the upper body and the lower body and the upper body and the lower body adopt an integral steel body structure, and the back-reaming cutting teeth are distributed on the lower body. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Laizhou Yuanye Science and Technology Co Ltd filed Critical Laizhou Yuanye Science and Technology Co Ltd Priority to CN2009202248491U priority Critical patent/CN201474613U/en Application granted granted Critical Publication of CN201474613U publication Critical patent/CN201474613U/en Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links Original Assignee Laizhou Yuanye Science and Technology Co Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Laizhou Yuanye Science and Technology Co Ltd Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Inventor 王克行 Current Assignee (The listed assignees may be inaccurate.
Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number CN2009202248491U Other languages Chinese ( zh)
Google Patents CN201474613U - PDC drill bit with back-reaming cutting teeth CN201474613U - PDC drill bit with back-reaming cutting teeth
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