12 1/4 Inch Tricone Bit IADC637 API Certificated Long Working Life for Trenchless Drilling Water Well

Product Description

Product Description SIZE : 12-1/4 inch
Diameter: 311.1mm IADC : 637
Bearing Type : Rubber Jounary Bearing
Gage Rows: Tungston carbide instert
Pin Connection : 6-5/8"
Metric Bit Diameter: 311mm
Product Weight: 117kgs Operation Recommendations
Weight On Bit (KN/mm): 0.70-1.2 (Ton)
Rotation Speed (Rotary): 70-40( rpm )
Application : Drilling Industrial ,oil well drilling ,mining drilling, water well drilling ,
Product photos
For the size,IADC and other detailed information as below for your reference.

TCI Bit Size		API Pin
in	mm	in
3 1/2	88.9	2 3/8
4 5/8	117.5	2 7/8
4 3/4	120.6	2 7/8
5 1/2	139.7	3 1/2
5 7/8	149.2	3 1/2
6	152.4	3 1/2
6 1/4	158.8	3 1/2
6 1/2	165.1	3 1/2
6 3/4	171.4	3 1/2
7 1/2	190.5	4 1/2
7 7/8	200.0	4 1/2
8 1/4	209.6	4 1/2
8 3/8	212.7	4 1/2
8 1/2	215.9	4 1/2
8 3/4	222.2	4 1/2
9 1/2	241.3	6 5/8
9 5/8	244.5	6 5/8
9 7/8	250.8	6 5/8
10 5/8	269.9	6 5/8
11	279.4	6 5/8
11 5/8	295.3	6 5/8
12 1/8	308.0	6 5/8
12 1/4	311.1	6 5/8
12 15/32	320.0	6 5/8
13 1/8	333.4	6 5/8
13 5/8	342.9	6 5/8
13 3/4	349.2	6 5/8
14 5/8	355.6	6 5/8
14 3/4	374.6	7 5/8
15 1/2	393.7	7 5/8
16	406.4	7 5/8
17 1/2	444.5	7 5/8
20	508.0	7 5/8
26	660.4	7 5/8

IADC	Normal WOB	Rotary Speed	Application formation
	kn/mm(bit dia.)	(rpm)
417	0.35-0.90	140-70	Very soft with low commpressive strengh and high drillability,such as shale,clay,and conglomerate,etc
437	0.35-0.95	140-60	Very soft with low commpressive strengh and high drillability,such as shale,clay,sandstone and conglomerate,etc
517	0.35-1.05	120-50	Soft with low commpressive strengh and high drillability,such as shale,clay,sandstone and limestone,etc
537		110-40	Medium soft with low compressive strength and harder abrasive stringers,such as hard shale,hard gypsolyte,soft limesone,sandstone and dolomite withstringers,etc
617		80-40	Medium hard with high compressive strength and thick&hard stringers,such as hard shaie,limestone,sandstone and dolomite,etc.
637	0.70-1.20	70-40	Medium hard with high compressive strength and high abrasiveness,such as limestone,dolomite,sandstone and chert,etc.
Note:The upper limits of WOB and RPMrecommended in above table should not be used simultaneously.

IADC	Normal WOB	Rotary Speed	Application formation
	Ib/in(bit dia.)	(rpm)
412	1000~2000	120~60	Designed for very soft formations with low compressive strengths and highdrillability such as shale,soft limestone,sandstone,conglomerate,soft dolomiteand coal ore.
415
432	1000~4000	100~60
435
532	2000~5000		Designed for soft formations with lowcompressive strengthssunch as shale,softlimestone,dolomite with interlayersand coal ore.
535
612	3000~5000		Designed for medium hard and abrasive formations with high compressivestrengths sunch as limestone,sandstone,dolomiteand chert.
615
632	3000~6000
635
732	4000~7000	90~60	Designed for hard and abrasive formationswith high compressive strengths sunch as granite,limestone,sandy sandstone,dolomiteand chert.
735
832	5000~8000		Designed for extremely hard andabrasiveformationswith compressivestrengths such as magnetite quartzite,quartzite,granite.
835
Note:The upper limitsof WOB and RPM recommended in above table should not be used simultaneously.

FAQ:1.Q: Are our company a manufacturer or distributor ?A: Manufacturer, We are a 100% real factory of Rock Drilling Bits, with more than 30 years' experience. And We have passed the factory audit by SGS.Feilong Rock drilling tools have been being sold well and running stably in many areas, such as: Russia, Indian, South Africa, and Middle East countries and regions.2.Q: How about our products?A : Both tricone bits and PDC bits produced strictly according to API and rock bits-customizing used in construction works areprovided.--We are a 100% factory of tricone bits (both Steel Milled Tooth and Tungsten Carbide Inserts Bit) & PDC drill bits from 3 1/2 to 17 1/2 inch,with more than 30 years' experience of producing new drill bits.--Our bits basing on high-tech skills and designs are used in the exploitation of natural gas, crude oil, waterwell, geological exploration and so on.---Feilong Rock bit Drilling Tools include Water and Oil well drilling, Piling foundation and HDD drilling, like Single Roller Cutters/Cones/Palms, Drag Bits, Hole Openers/Rock Reamers, Core Barrel and other customized bits depending on the utility demand.Rock Reamers for HDD/Trenchless/No Dig, Hole Openers with Roller Cone Palm / Single Roller Cone Bit3.Q: What kind of packing do we supply?A: --Ply Wooden boxes (free of fumigation); --Cartons; --Steel Boxes; --Packing can be customized. (-Up to export standard)Rock Reamers for HDD/Trenchless/No Dig, Hole Openers with Roller Cone Palm / Single Roller Cone Bit4.Q: What is your price advantage?A: We are 100% factory directly sales, API production process guarantee,Provide customized services for brand processing.--There are technical research team, production management team and professional sales team in our company to serve customers.--Reduce the cost of drilling for you, worry free after-sales service. Welcome to book a video-call to inspect our factory.5.Q: What is the Minimum Order Quantity?A:It is up to clients requirements, usually 1-5 pcs.

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