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76mm tungsten carbide drill bit

Name: 76mm tungsten carbide drill bit
Brand: Hejian Hengji Bit Manufacture Co., Ltd.
Rating: 4.4 (28 reviews)

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Model No. :	IADC 637
Brand Name :	HJ

9yrs

Hejian, Hebei, China

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Hejian Hengji Bit Manufacture Co., Ltd.

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Product description

Welcome visit hengji bit company

We have all size of tricone bits,PDC bits,core bits,steel tooth bits,insert tricone bits,single cone bits,hole opener,assemble tricone bit,etc. Suitable for soft to hard formations. 76mm tungsten carbide drill bit 1,

size	76mm
API Pin	2 7/8inch
type	100%new
processing	melding
IADC	637
WOB	0.5-1.2kN/mm
RPM	80-40r/min
Applicable formation	medium hard formation with low compressive strength ,such as medium soft shale,limestone and sandstone as well as thick and hard streaks,etc
Payment terms	T/T,etc.
MOQ	1pcs
shiping	By sea,by air,by train,by DHL,etc.

The advantage: Cutting structure The wear-resistance of teeth is enhanced with premium tungsten carbide hardfacing on the tooth surfaces for steel tooth bit.The durability of premium tungsten carbide inserts is improved with new formulas and new techniques for insert bit. Gauge structure Multiple gauge protection with gauge trimmers on the heel and gauge inserts on the gauge surface of the cone ,tungsten carbide inserts and hardfacing on the shirttail increases gauge holding capability and bearing life. Bearing structure High precision journal bearing with two thrust faces.Balls lock the cone.The leg bearing can get larger by arranging the rollers in groove of the cone hole,so it can receive mor WOB ,and suitable for high RPM.Thrust faces hardfaced with wear resistant alloy.Abrasion resistance and seizure of the bearing are improved. Seal and Lubrication Premium HNBR O-ring,optimal seal compression and curved seal structure can enhance seal performance. The pressure compensator system and advanced grease can greatly increase the lubricating reliability. Product application It can receive higher WOB and faster rotary speed than conventional roller bearing bits.It is suitable for high RPM applications. The process:

The cataloge

TCI tricone drill bit
IADC	WOB(kN/mm)	RPM(r/min)	Applicable formation	Size(inch)
417/427	0.3-0.9	150-70	very Soft formation with low compressive strength and high drillability,such as clay,soft mudstone,shale,salt,loose sands,etc.	3 1/2	4 5/8	4 3/4
437/447	0.35-0.9	150-70	very Soft formation with low compressive strength and high drillability,such as clay,soft mudstone,shale,salt,loose sands,etc.	5 1/2	5 7/8	6
515/525	0.35-0.9	180-60	very Soft formation with low compressive strength and high drillability,such as mudstone,salt,soft limestone, sands,etc.	6 1/4	6 1/2	6 3/4
517/527	0.35-1.0	140-50	Soft formation with low compressive strength and high drillability,such as mudstone,salt,soft limestone,sands,etc	7 1/2	7 7/8	8 1/4
535/545	0.35-1.0	150-60	medium soft with harder formation, more abrasive streaks,such as hard shale,mudstone,soft limestone,etc.	8 3/8	8 1/2	8 3/4
537/547	0.4-1.0	120-40	medium hard with harder formation, more abrasive streaks,such as hard shale,mudstone,soft limestone,etc.	9 1/2	9 5/8	9 7/8
617/627	0.45-1.1	90-50	medium hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc.	10 5/8	11	11 5/8
637	0.5-1.2	80-40	hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc.	12 1/8	12 1/4	13 1/8
737	0.7-1.2	70-40	Hard with high abrasiveness such as hard limestone,dolomite,firm sands,etc	13 5/8	13 3/4	14 5/8
827/837	0.7-1.2	70-40	very hard with high abrasiveness,such as quartzite,quaruzite sand,chert,basalt,granite,etc.	14 3/4	15 1/2	16
827/837	0.7-1.2	70-40		17 1/2	20	26

Steel tooth tricone drill bit

IADC WOB(kN/mm) RPM(r/min) Applicable formation Size(inch) 114\115 0.3-0.75 180-50 Soft formation with low compressive strength and high drillability,such as mudstone,clay,chalk,etc 4 5/8 4 3/4 5 3/4 116\117 0.3-0.8 150-70 Soft formation with low compressive strength and high drillability,such as mudstone,clay,chalk,etc 5 7/8 6 6 1/4 124\125 0.3-0.85 180-60 Soft formation with low compressive strength and high drillability,such as mudstone,clay,salt,loose stands,soft limestone,etc 6 1/2 6 3/4 7 1/2 126\127 0.3-0.9 150-60 Soft formation with low compressive strength and high drillability,such as mudstone,clay,salt,loose stands,soft limestone,etc 7 7/8 8 3/8 8 1/2 131\134\135 0.35-0.95 150-50 Soft to medium formation with low compressive strength or soft with harder streaks,such as mudstone,shale,soft limestone ,sands,etc 8 3/4 9 1/2 9 5/8 136\137 0.35-1.0 120-60 Soft to medium formation with low compressive strength or soft with harder streaks,such as mudstone,shale,soft limestone ,sands,etc 9 7/8 10 10 5/8 214\215 0.4-0.95 150-60 medium hard formation with high compressive strength ,such as medium soft shale,anhydrite,medium soft limestone ,medium soft sandstone as well as thick and hard streaks,etc 11 11 5/8 12 1/4 216\217 0.4-1.0 100-60 medium hard formation with low compressive strength ,such as medium soft shale,limestone and sandstone as well as thick and hard streaks,etc 13 5/8 13 3/4 14 3/4 244 0.35-0.95 150-50 medium hard formation with high compressive strength ,such as hard shale,sands ,limestone,etc 15 15 1/2 16 246\247 0.4-1.0 80-50 medium hard formation with high compressive strength ,such as hard shale,sands ,limestone,etc 17 1/2 20 22 324\325 0.4-1.0 120-50 hard formation with high strength and abrasiveness such as hard limestone,hard sands,dolomite,hard shale,etc 24 26 2, Application for bit In Petroleum & Gas ,Water well ,Mining and Tectonic Industries ,Oil field, Construction, Geothermal, Directional Boring, and Underground Foundation work.

3,product introduction: 1, Tricone bit The bit structure Cone bit is composed by cutting structure, bearing structure, the locking element and oil sealing device, nozzle device, more than 20 kinds of parts . The leg material is 15CrNiMo,a tricone bit is composed of 3 legs.The cone material is 15CrNi4Mo.The tooth type is include steel tooth and insert tooth.Insert tooth is punch in outside of the cone.The steel tooth is milled from the cone directly.the tooth is engage each other, Can break comprehensive rock effectively and without repeated and prevent alveolar mudbag . Bit tooth shape, size, quantity, depending on the drilled strata hardness, formation is soft, then the teeth larger and more pointed, the fewer quantity.

Bit Nozzle type:S-series, P-series,M-series.A bit uaually include 3 or 4 nozzles.Diameter7-14mm. It is fixed in the hydrophthalmia with circlip and sealed with O-ring.
Roller arrangement: 1,Non self washing no slide layout:suitable for hard formations. 2,Self cleaning does not shift shaft arrangement: suitable for medium formations. Bearing of bit : Bearing structure include Cone cavity, claw shaft neck, bearing the runway, the locking element . Each cone has large, medium and small and the thrust bearing ,toal four paybearing. Big, small bearings bear radial load; medium bearing used in locking and positioning;thrust bearing bear axial load. Oil lubrication sealing system: Sealing system include two types : O-ring sealed ,metal sealed. operational principle :Oil pressure compensation system (the pressure transmission hole, pressure compensation film, oil etc.) to keep equilibrium between the oil and fluid pressure in the well .When oil pressure reduce , oil in storage cup is added into bearing cavity in the effect of drilling fluid column pressure.When Oil pressure of the bearing cavity increase, oil fluid into the cup.So,well sealed is very important. Different tooth corresponding different formation

operational principle of roller bit 1,Movement in the bottom of the well Revolution: Roller rotating along with a drill, clockwise Rotation: Teeth counterclockwise rotation around the axis, said rotation, counter clockwise Sliping: The tooth slip with respect to the bottom , including radial (axial) and tangential. The longitudinalvibration In the rolling process, the center ups and downs, so that the drill bit do reciprocating movement up and down. 2,rock-breaking mechanism: Shock ,crush;slip shear. Roller cone bit nozzle and assembly size

bit size		nozzle OD	assembly length	nozzle jetting ID
in	mm	mm	mm	mm
3 1/2-5 1/2	88.9-139.7	20.3	17.5	4-10
5 5/8-7 3/8	142.9-187.3	23.6	19.0	5-16
7 1/2-8 1/4	212.7-371.5	33.0	27.0	8-20
8 3/8-14 5/8	212.7-371.5	33.0	27.0	8-20
>=14 3/4	>=374.6	40.9	27.0	10-22

Recommended roller cone bit make-up torque

bit size	API pin	recommended torque
in	in	N · m
3 1/2-4 1/2	2 3/8	4100-4700
4 5/8-5	2 7/8	6100-7500
5 1/8-7 3/8	3 1/2	9500-12200
7 1/2-9	4 1/2	16300-21700
9 1/8-14	6 5/8	38000-43400
14 3/4-17 1/2	7 5/8	46100-54200
18 1/2-28	8 5/8	54200-81300

Photos show:

2,Diamond drilling bit diamond pdc core bits for coal mining are the new bits with the characteristics of high wear resistance, high impact resistance, high penetration rate. After using on site, it is proved that PDC bits have advantages in high speed,deep footage, long life, steady work, few accident, good well bore quality when sneaking in hard or soft foundation. Company independently developed the PDC drill bits have reached more than 30 varieties of products to meet the needs of different strata. PDC bits characteristics: 1. Uses outline optimization design, adapts in different strata. 2. Short parabolic crown, cutting force balance design structure, spiral knife wing, balance the bit force, improve impact resistance. 3. Uses the dynamic flow field technique of simulation, optimizes the drill bit water power design, strengthens the drill bit clean, cooling capacity and prevents the drill bit balling. 4. Using high performance compound piece combination , enhances the bit life.

packaging&Shipping: By sea,By air ,By train,By truck,and so on 1). By Express like TNT, DHL, UPS, Fedex, Aramex, suitable for small bits total weight less than 45kg 2). By Air, suitable for urgent orders, total weight exceed 45kg 3). By ship, suitable for large quantity, will take more shipping time

The certification:

Our Services How to choose the type: shallow well, mainly consider the drilling speed and preventing the mud pack. deep well,mainly consider the bit footage When out of the well the outer cutter is broken heavily, should be selected with gage bit In the ease of deviated section should use small and short cutter bit In the selection of insert button bit, should use the wedge-shaped cutter Diamond limestone, appropriate uses double bevel gear, projectile shape tooth bit Shale more or drilling fluid density is larger, should be selected with a larger amount of slip drill The formation of limestone, sandstone, should choose smaller slip bit In drilling hard and high abrasive stratum, appropriate uses ball tooth, double cone tooth head. FAQ 1. How to order the products?
Answer:
Send the inquiry with detail item description or with Model number.
If there is no packing demand we take it as sea-way packing.
If possible please attach one reference picture to avoid any misunderstanding or any links from our website for we get a better understanding. http://hengjibit.en.alibaba.com/ 2. About delivery time?
Answer :
The delivery time depend on quantity of order. Usually shipped by sea, small order or urgent order we can send you by air after received your agreement. 3.Can I expect a quality products?
Answer :
Yes. All our activities are accredited to ISO 9001:2008 , both in products and services, at the same time, mature production technology ensuring the quality satisfy international request. 4.Trade Terms: payment:T/T. 30%deposits,70% before delivering. If you have any questions ,pl tell me ,it is my pleasure to reply you.