Specifications underground mine drill bits

1. high quanlity with competitive price

2.long life with scientific desigh

3.fast delivery

underground mine drill bits? ? ? 1.?????5 1-8?IADC 637 Diamond Oil Drill Bit ??? ? ? ??????????? Tungsten carbide cutter of high strength and toughness is used to ??? ?increase the impact resistanceof cutters and decrease the breakage rate. ?????Optimal cutter rows,cutter quantitty,cutter length and cutter structure ? ???? design largely?improve the drilling capability and speed. ???? Widely??used in oil exploration, mining prospecting,subterranean beat, ??????? hydrology etc. ? ? 2. Other Mian Products?? ? ?????? ???????? ? 3. Manual of cone bit purchase ??????

Roller cone bit(IADC)	Roller cone(m/h)		Formation hardness	Formation	Rock type	Compress strength
	WEM	OBM
111/124	15-30	18-33	very soft	soft formation with sticky layerand low compressive strength	clay/slits/sands	<25MPa
116/137 437	9-15	18-33	soft	soft formation with low compressive strength and high drill ability	claystone/marl/lignite sangstone/tuff	25-50MPa
126/139 517/527	4.5-9	6-12	medium soft	soft to medium formation with low compressiv estrength and small abrasive layers	claystone/marl/lignite/tuff sangstone/silts/anhydrites	50-75MPa
211/217 517/537	2.5-6	3-6	medium	medium to hard formation with high compressive strength and small abrasive layers	mudstone/limestone anhydrites sandstone(calcareous)	75-100MPa
211/236 537/617	1.5-2.5	1.5-3	medium hard	hard and dence formation with very high compressive strength but non abrasive	limestone/ anhydrites dolomite	100-120MPa
311/347 627/637	1-1.5	1-1.5	hard	hard and dence formation with very high compressive strength and some abrasive layers	shale(calcareous)/sandstone (siliceous)/siltstone	100-200MPa
637/737/837	1	1	very hard	extremely hard and abrasive formation	quartzite/lgneous/rock	>200MPa

? ?? 4. Packing Way ? ???? ? 5. Certification ? ??? ? ? 6. Factory view ? ???? ? ? 7. About Us. ? ???? Hebei Ruishi Bits Manufacturing Co., L T D, is a professional manufacturer engaged in the research, development, production, sale and service of drill bits, PDC bits, core bits, drag bits, hole openers.? Apart from the fact that our products selling well in almost all cities and provinces around China, our products also have enjoyed great popularity in world market, such countries and regions as? USA, Europe, the Middle East. We also welcome O E M and O D M orders. Whether selecting a current product from our catalog or seeking assistance for your application, you are welcomed to talk to our customer service center about your sourcing requirements. We would like to establish direct business relations with you on the basis of equality and mutual benefit. We are sincerely waiting your kindly and prompt enquiry? ! ? ??????