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Hejian Deris Petroleum Drilling Equipment Co.,Ltd.


Home > Products > Tricone Bit > Steel Tooth Tricone Bit > 444.5mm 17 1/2" GAT135 steel tooth tricone bits

444.5mm 17 1/2" GAT135 steel tooth tricone bits
444.5mm 17 1/2" GAT135 steel tooth tricone bits
444.5mm 17 1/2" GAT135 steel tooth tricone bits
444.5mm 17 1/2" GAT135 steel tooth tricone bits
444.5mm 17 1/2" GAT135 steel tooth tricone bits

444.5mm 17 1/2" GAT135 steel tooth tricone bits

Payment Type: L/C,T/T,D/P,Western Union
Min. Order: 1 Piece/Pieces
Delivery Time: 3 Days

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  • Basic Info
  • Product Description
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Basic Info

Model No.: GAT135

Customized: Other

Certification: API, Other

Length: Other

Type: Center Drill Bit

Material: Tungsten Carbide

Use: Well Drilling

Application: Well Drilling,oil ,gas Drilling

Formation: Soft To Medium Formation

Size: 3 1/2"~ 26"

Color: Blue Or As Your Need

IADC CODE: 114,115,117,125,127,215,217

Advantage: Durable And High Efficiency

Feature: Gauge Protection

Standard: SY/T5164 ,API

Working Life: About 200 Hours

Shipping Term: By Sea Or By Air

Additional Info

Packaging: 1pc tricone bit per wooden case

Productivity: 300 pc/ Month

Brand: Deris

Transportation: Ocean,Land,Air,Express

Place of Origin: Hebei

Supply Ability: 300 pc/ Month

Certificate: ISO 9001

HS Code: 82071990

Port: Tianjin,Beijing,Qingdao

Product Description

GAT series bit adopts rubber seal with roller Bearing which is the ideal and economical tool for drilling applications where middle to low WOB and high RPM are required.

Main structure features:
1.Sealed roller bearing structure. With roller arranged in grooves recessed in the cone body, the size of the bearing journal is increased, therefore, with the ability of enduring high WOB and applying for high RPM.
2.Thrust bearing surfaces are hardface and treated with friction reducing technology.
All rubber compensator is used which can limit pressure differential and prevent drilling fluid from entering the lubrication system and this provides the bearing system with good assurance of lubrication.

GAT Steel tooth tricone bit

First Digit-1,2,3 designate steel tooth bits and the formation being drilled,with 1 for soft,2 for medium,and 3 for hard formations.4,5,6,7,and 8 designate tungsten carbide insert bits and the formation being drilled,with 4 being the softest and 8 the hardest formation.
Second Digit-1,2,3 and 4 are further broken down by the formation,with 1 being the softest and 4 the hardest.
Third Digit-Classifies the bit according to bearing/seal type and special gauge/wear protection.

1.Open Bearing-On these bits the cones will spin freely.The bit has a front row of ball bearings and a back row of roller bearings.
2.Opening Bearing,Air-Cooled-Cones are similar to#1.but have air injection directly to the cones to cool the bearings.Air flows into the cone through the passage ways inside the pin.(Not for use in mud applications.)
3.Open Bearing with Gauge Protection-Carbide inserts in the heel of the cone.
4. Sealed Roller Bearing-These bits have an o-ring seal with a grease reservoir for bearing cooling.The seal acts as a barrier against mud and cuttings to protect the bearings.
5.Sealed Roller Bearing with Gauge Protect-Carbide inserts in the heel of the cone.
6.Sealed Journal Roller Bearing-These bits are strictlt oil/grease cooled with nose bearings,o-ring seal and a race for maximum performance.
7.Sealed Journal Rolling Bearing with gauge protect-Carbide inserts in the heel of the cone.
Fourth Digit-used to indicate additional features.

A. Air Application E: Extended Jet X: Chisel Insert C: Center Jet G: Extra Gauge Protection Y: Conical Insert
S:Standard Steel Tooth J: Jet Deflection Z:Other Insert Shape D:Deviation Control R:Reinforced Welds
Example IADC Code:514
Bit Description:
5=Tungsten Carbide Insert,Soft to Medium Formation
1=Soft Formations
4=Sealer Roller Bearing

Feature of 17 1/2" drilling Tricone Bit feature

General Date
Bit Size 17 1/2" 444.5mm


GAT 135

Bearing Type

Journal bearing



Seal Type

Nitrile sealed

Nitrile sealed Feature

Oil resistant

High temperature resistance

Excellent elasticity

Connection Size

7 5/8"

Connection Type


Nozzle size code


Operation Date

Nozzle O.D.

32.89 mm

Assembly length of nozzle


Recommend Make up Torque

46.1~54.2 KN·M

Weight On Bit
Max KN/mm (Dia.Bit)


Min KN/mm (Dia.Bit)


Rotary Speed (RPM)

150~80 r/min


High efficiency carbide tricone bit Operation Industructions

IADC code

WOB Kn/mm (Bit dia)

RPM (R/min)

Application Formation




Very soft with low compressive strength and high drillability,such as soft shale ,clay and salt bed,etc




Very soft with low compressive strength and high drillability,such as soft shale ,clay and salt bed,etc




Soft with low compressive strength and high drillability,such as sale ,clay,salt bed and soft limestone,etc





Medium hard with hard stringers,such as hard shale ,sandstone and limestone ,etc



Very soft with low compressive strength and high drillability,such as soft shale ,clay and salt bed,etc



Soft with low compressive strength and high drillability,such as sale ,clay,salt bed and soft limestone,etc
Soft to medium soft with low compressive strength or soft with harder stringers ,such as hard gypsolyte ,soft limestone and sandstone etc
Medium hard with relatively higher compressive strength and hard stringers,such as hard shale ,sandstone and limestone ,etc
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My company information

Hejian Deris Petroleum drilling equipment Co., Ltd was established in 2000, located in Hejian City Junziguan Industrial Park,close to Tianjin Port, Beijing Airport,The company covers an area of 30 acres and a factory building of 15,000 square meters.

Specializing in the production and sales of Drilling Tools such as Tricone bit, PDC drill bits, Hole Opener, roller cone drills, hammer and hammer bit, drill pipes, drill collars,etc.

Products are sold to the United States,Canada,Russia,Kazakhstan, Iran,Qatar,Sweden,Germany,Australia,Singapore,Mexico,Colombia and other more than 30 countries.

Our company is planning to build a new factory,adding 3 production lines,CNC machine tools,drilling machines,milling machines, quality testing equipment, ensure quality and timely delivery.Make sure that every quality product meets customer needs.Looking forward to working with you.

tricone bits for drilling a water well


tricone bit certificate

Package and shipping

Package Type:wooden case,also be packaged according to customers requirement

Transportation:by sea,by air or land transportation.Less than 50kg shipping by courier better
Delivery:If we have stock, the delivery time will need about 2~3 working days.In general,common size tricone bits and PDC Bit,we have stock
If we have no stock,such as the tci reamer and PDC Hole Opener,it will be 7-10 working days in total

444.5mm-steel-tooth bits

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If you need please send Email us

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Our service

1 We are manufacture can supply good quality goods and competitive price
2 We not only have ourselves design but also can accept customization
3 We have fast and on time delivery time
4 Every bits have it's quality assurance
5 Contact our anytime if you have any question with bits.
6 Technical supply online

How to complete the whole deal
1. Firstly decide the design, material and color
2. Decide the size in accordance with client's requirement and our recommendation
3. We will give the best offer.
4. Client's accept the offer and we send proforma invoice.
5. Client transfers 30%-50% deposit and production begins
6. After production, we will send ready products photo
7. After client's confirmation, we will arrange shipment, and send copy shipping documents like B/L,commercial invoice and packing list
8. Client transfer balance payment and we will send original documents by express or Telex Release

hejian deris bit

Looking for ideal GAT Steel Tooth Tricone Bit Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Steel Tooth Tricone Bits are quality guaranteed. We are China Origin Factory of 444.5mm Tricone Bits. If you have any question, please feel free to contact us.

Product Categories : Tricone Bit > Steel Tooth Tricone Bit

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