Water Well Drill Bit/Tri-Cone Drill Bit/Oil and Gas Well Drill Bit

• Customized: Customized
• Standard: API
• Length: 520mm
• Model NO.: Tricone bit
• Type: Well Drilling Water Well Drilling Geothermal Well
• Material: Tungsten Carbide
• Usage: Well Drilling
• Transport Package: Wooden Box Packaging
• Specification: 285mm*285mm*520mm
• Trademark: Feilong Retop
• Origin: China
• HS Code: 8207199001
• Production Capacity: 20, 000 Pieces/Year

Product Description

FA Series Journal Bearing Tricone Bit

Cutting Structure
 The wear-resistance of the teeth is enhanced with premium tungsten carbide hard-facing on the tooth surfaces for the 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 of cone,tungsten  carbides inserts and hard-facing on the shirttail increases gauge holding capability and bearing life.

Bearing Structure
High precision journal bearing with two thrust faces.Balls lock the cone.Hard-faced head bearing surface.Cone bearing inlaid with friction-reducing alloy and then silver plated.Abrasion resistance and seizure resistance of the bearing are improved.

Seal and Lubrication
Premium HNBR O-ring,optimal seal compression and curved seal structure can enhance the seal performance.The pressure compensator system and advanced grease can greatly increase the lubrication reliability.

Product Application
It can receive high WOB in the conventional drilling.It is suitable for various formations by matching cutting structure with different tooth shape,tooth density and tooth exposure height.






Current Availability

Bit Size		Bit type
in	mm
4 3/4	120.7	FA216 FA517 FA537 FA547
5 5/8	142.9	FA216 FA517 FA537
5 7/8	149.2	FA216 FA517 FA537 FA547
6	152.4	FA117 FA216 FA246 FA517 FA547
6 1/2	165.1	FA127 FA217 FA517 FA537
6 3/4	171.5	FA116G FA447 FA537
7 1/2	190.5	FA127 FA217 FA517 FAT517 FA527 FAT527 FA617
7 7/8	200.0	FA117G FA437G FA517G FA527G FA537G FA547G FA547G FA617G  FA627G FA637G
8 1/2	215.9	FA117 FA127 FA137 FA217 FA247 FA437G FA447G FA517G FAT527G FA537G FAT547G FA617G FA637G FA637G
8 3/4	222.3	FA116G FA437GK FAT517G FA537GFA627G
9 1/2	241.3	FA117G FA127G FAT417G FA437G FA517G FAT527G FAT537G FAT547G FA617G
9 5/8	244.5	FA437G FAT517G FA527G FA537G FA547G FA617G
9 7/8	150.8	FA117G FA417G FA437G FAT527G FA527G FA537G FA547G
10 5/8	269.9	FAT127G FA217G FA437G FA517G FA547G
11 5/8	295.3	FA117G FA127G FA137GW FA217G FA417G FA517G FA537G FA547G
12 1/4	311.2	FAT117 FA127 FA137 FAT417GK FAT437G FAT517G FAT527G FAT537G FAT547G FAT617G FA627G FA637G
13 5/8	346.1	FA437G FA517G FA537G
14 3/4	374.7	FA117G FA127G FA137G FA517G FA527G
15 1/2	393.7	FA127G FA217G FA517G FA527G FA537G FA547G
16	406	FAT117G FAT127G FA127G FAT517G FAT527G FA535 FAT537G FAT547G FA545
17 1/2	444.5	FAT117G FA127 FA137 FAT437G FAT517G FAT527G FAT537G FAT547G

Recommended Drilling Parameters

IADC	WOB (KN/mm) (Bit Dia)	RPM (r/min)	Applicable Formations
116  117	0.35~0.8	150~80	Very soft formations with low compressive strength and high drillability. Such as clay, mudstone ,chalk,etc
126  127	0.35~0.9	150~70	Soft formations with low compressive strength and high drillability,such as mudstone,gypsum,salt,soft shale,soft limestone,etc
136  137	0.35~1.0	120~60	Soft to medium soft formations with low compressive strength and high drillability ,such as medium soft shale,hard gypsum, medium soft limestone,medium soft sandstone,soft formation with harder interbeds,etc
216  217	0.4~1.0	100~60	Medium formations with high compressive strength,such as medium soft shale,hard gypsum,medium soft limestone,medium soft sandstone,soft formations with harder interbeds etc
246  247	0.4~1.0	80~50	Medium hard formations with high compressive strength ,such as abrasive shale,limestone,sandstone,dolomite,hard gypsum,marble,etc
417  437  447	0.35~0.9	150~70	Very soft formations with low compressive strength and high drillability ,such as clay, mudstone,chalk gypsum,salt,soft shale,soft limestone etc
517  527	0.35~1.0	140~60	Soft formations with low compressive strength and high drillability such as mudstone ,gypsum,salt ,soft shale ,soft limestone,etc
537  547	0.45~1.0	120~50	Soft to medium formations with low compressive strength ,such as medium soft shale,medium soft limestone,medium soft limestone,medium soft sandstone,medium formation with harder and abrasive interbeds,etc
617  627	0.45~1.1	90~50	Medium hard formations with high compressive strength such as hard shale,limestone,sandstone,dolomite,etc
637	0.5~1.2	80~40	Hard formations with high compressive strength,such as sandstone,limestone,dolomite,hard gypsum,marble,etc

Note: the upper limits of WOB and Rpm in above label should bot used simultaneously


FJ Series Metal Sealed Bearing Tricone Bit

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 capacity and bearing life.

Bearing Structure
High precision journal bearing with two thrust faces, Balls lock the cone. Hardfaced head bearing surface. Cone bearing inlaid with friction-reducing alloy and then silver-plated. Abrasion resistance and seizure of the bearing are improved, and suitable for high rotary speed.

Seal and Lubrication
The advanced metal seal package consists of two metal seals and two elastic energizers. Compressed energizers ensure good contact being kept on two sealing surfaces of metal rings by elastic force, and achieves the bearing seal. In the drilling, metal seals are relatively dynamic, and the energizers are static. This will improve the reliability and durability of bearing seal. The pressure compensator system and advanced grease can greatly increase the lubricating reliability.

Product Application
It is suitable for downhole motor and high speed applications.




Current Availability

Bit size		Bit type
in	mm
7 7/8	200.0	FJ517G  FJ527G  FJ547GY  FJ617GY  FJ627G  FJ637GY
8 1/2	215.9	FJT117GW FJT127GW FJT437GK FJT447GK FJT517G FJT537G FJT617GY FJT627G FJT637GY
9 1/2	241.3	FJT117GW FJT127GW FJT437G FJT517G FJT537G FJT547G FJT617GY
12 1/4	311.1	FJT117GW FJT127GW FJT437G FJT517G FJT537G FJT617GY FJT627G FJT637GY
17 1/2	444.5	FJT117GW FJT127GW FJT517G FJT537G FJT617GY FJT627G FJT637GY

 Recommended Drilling Parameters

IADC	WOB (kN/mm) (bit dia)	RPM (r/min)	Applicable Formations
117	0.35-0.8	240-80	Very soft with low compressive strength and high drillability, such as mudstone, clay and chalk, etc.
127	0.35-0.9	240-70	Soft with low compressive strength and high drillability, such as soft shale,clay, gypsum, mudstone, salt, and soft limestone, chalk, etc.
437 447	0.35-0.9	240-70	Very soft with low compressive strength and high drillability, such as shale,clay, chalk, mudstone, gypsum, sandstone, soft limestone
517 527	0.35-1.0	220-60	Soft with Low compressive strength and high drillability, such as mudstone,gypsum, salt, soft shale, soft limestone,etc
537 547	0.45-1.0	220-50	soft to medium with low compressive strength, such as medium soft shale, medium soft limestone, medium soft sandstone and medium formation with harder and abrasive interbeds, etc.
617 627	0.45-1.1	200-50	Medium hard with high compressive strength, such as limestone,hard shale, sandstone and dolomite, etc.
637	0.5-1.1	180-40	Hard formation with high compressive strength, such as limestone, dolomite, sandstone , hard gypsum, and marble,etc

Note: The upper limits of WOB and RPM in above table should not be used simultaneously.


One:Usage of tricone bit

1. The proper bit box should choose, according to the recommended prepaid moment of connected thread put into make up torque, install the bit on the drill pipe or drill tools. Be careful not to damage the bit or nozzle.
2. Regular the meter before tripping in the hold. No obstacle in the well.
3. The operation should stable, control the speed, to avoid bit touch the well wall.
4. When the bit is nearly close to the well bottom, slow down the tripping speed, not to stop suddenly, to avoid bit touch the well wall on the effect of inertia.
5. When the bit is nearly close to the well bottom, recycle the mud adequately, and begin the rotate and down.
6. When the bit reach the well bottom, small WOB with low rotate speed for more than 30 minutes. Fitting the bit bearing and the well bottom at the same time.
7. According to the characteristics of earth lithology, select WOB and speed according to "operation parameter table". During operation, the WOB and speed of bit should not exceed the nominal range.
8. During operation, the applied WOB should be even, not to apply WOB discontinuously. If need to stop, the bit should be stop after the pointer has return back.
9. There is rubber piece and lubricating grease in tricone bit, so it can not be stored in the open air, and be damp proof, the temperature should be 0⁰C--40⁰C. No welding, heating and other processing is permitted on bit.

Two: Tricone bit transportation
As the small volume of tricone bit and heavy weight, safety should be noticed during transportation. The package is carton box or wood box, waterproof and damp proof should be noticed during transportation.

Three: Type selection of tricone bit

1. Appropriate bit should be chosen by the drilling rock formation and reference on the conjoint well.
2. Refer to the " Comparison list between FL tricone bit and IADC classification" choose the appropriate type for tricone bit.

Four: Tripping out of the hole
  In the normal situation, base on the experience or service time and wearing of the last bit, reference on the conjoint well, and the character of earth formation and bit, to choose the drill draw bake time.
  In case of not excluded or abnormal that can result in accident, the bit should be brawn back in time.

Five: Analyze and treatment of trouble
  During the operation in well, the variation of all kinds of drilling parameters should observe in time, analyze synthetically the reason. To estimate the operating condition in the well, and avoid accident.