Tricone Drill Bits
SHAREATE TOOLS LTD.
mining tricone bit is mainly used in large open-pit mining operations,
such as open-pit coal mine, copper mine, molybdenum mine, iron ore mine and other non-ferrous metal mine.
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Product Overview
SHAREATE TOOLS LTD. mining tri-cone drll bit is mainly used in large open-pit mining operations, such as open-pit coal mines, copper mines, molybdenum mines, iron ore mines and other non-ferrous metal mines. Tri-cone drll bits are used on rotary drills, with a proven reputation of high performance and low cost. Shareate has large scale dril bit R&D and manufacturing facilities in China using world class, leading technologies.
The company has adopted a flexible production system with the incorporation of CNC machining centres, being its core component. The production line consists of manufacturing equipment such as forging, heat-treatment, CNC machining centres, along with advanced inspection equipment.
Our products are designed and manufactured to our certified API Q1 specification and ISO 9001 standards.
The tri-cone drill bits range from 6 ¼” to 13 ¾” in size, and the production line is capable of customised design to manufacture for different sizes and series of drill bits to meet our customer's requirements.
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Product Overview
SHAREATE TOOLS LTD. mining tri-cone drll bit is mainly used in large open-pit mining operations, such as open-pit coal mines, copper mines, molybdenum mines, iron ore mines and other non-ferrous metal mines. Tri-cone drll bits are used on rotary drills, with a proven reputation of high performance and low cost. Shareate has large scale dril bit R&D and manufacturing facilities in China using world class, leading technologies.
The company has adopted a flexible production system with the incorporation of CNC machining centres, being its core component. The production line consists of manufacturing equipment such as forging, heat-treatment, CNC machining centres, along with advanced inspection equipment.
Our products are designed and manufactured to our certified API Q1 specification and ISO 9001 standards.
The tri-cone drill bits range from 6 ¼” to 13 ¾” in size, and the production line is capable of customised design to manufacture for different sizes and series of drill bits to meet our customer's requirements.
- Basic Structure of Mining Drill Bit
Tri-cone drill bits consists of a bearing structure, cutting structure,shirttail and lug enhancement structures, flow channel system, and a thread connections.
The bearing structure consists of lug bearing,cone bearing,seal ring (sealed bearing),main rollers, minor rollers, locking bearing balls, axle thrust plate, and recess thrust plate. They are categorised into air cooled open bearing or sealed bearing.
Product Characteristics
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By calculating the load distribution of each component in the bearing, the bearing geometric structure is designed to distribute bearing load evenly, which enhances the working bearing life. |
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Open bearingBearing structure: main roller – ball bearing - minor roller - thrust block, open bearing structure without seal ring |
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Sealed BearingBearing structure: O-Ring Seal – main roller – ball bearing - minor roller - thrust block, sealed bearing |
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Composite Sealed BearingBearing structure: Composite seal ring - main roller - ball bearing - minor roller - thrust block, sealed bearing |
- 1. Specific insert type and materials are selected based on ground formation strength and friability to optimize matching of carbide wear resistance and toughness.
- 2. Computer simulated bottom hole impact curve design helps to arrange inserts effectively, and balance the working load of drill bit inserts.
- 3. Double bevel inserts: two rows of cross patterned bevel inserts are designed to strengthen the gaging performance.
Lug back design promotes lift force which increases bailing space, accelerates bailing velocity and reduces wear on drill bit from cutting regrinds.
- Name of Drill Bit Series
- Shareate drill bit product model is divided into four sections: drill bit diameter code, drill bit series code, drill bit category code, and additional features code. Take 12 ¼ SGA745GF as an example:
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The first part is categorised based on drill hole operation requirement for selecting the correct bit size, displayed in numbers (integer or fraction) to indicate the diameter in inches. Our current tri‑cone product range includes 6 1/4, 6 3/4,7 7/8, 8 1/2, 9, 9 7/8, 10 5/8, 11, 12 1/4, and 13 3/4 (inch).
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The second part is based on drilling operating requirements for selecting the correct drill bit bearing and sealing structure, which is divided into the following series:
- SG series: Air cooled open bearing structure;
- SA, SGA series: Sealed bearing structure;
- SGV series: Composite sealed bearing structure.
- TJ series: Water circulation cooled pilot hole drill bit series for use with raise boring rig.
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The third part adapts the SPE/IADC codes, consisting of three digits, with the first digit of the IADC code referencing the cutting structure and formation series, the second digit further categorises the formation classification and the last digit is the drill bit structure characteristic code.
- The first digit ranges from 4 to 8, which designates soft formation, medium‑soft formation, medium‑hard formation, hard formation and extremely hard formation.
- The second digit classification ranges from 1 to 4, further categorising the formation.1 being the softest formation, and 4 being the hardest formation.
- The third digit classifies the structural characteristics of the drill bit which is divided into air‑cooled bearings and sealed bearings, expressed by 2 and 5 respectively.
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The fourth part affirms additional features. Shareate tri-cone drill bits can be manufactured with the following additional features:
G feature: Specific lug back strengthening
The new enhanced lug back with additional carbide effectively reduces the wear in abrasive ground condi-tions, improving the gage performance and bit life. In addition to the previous lug back protection inserts, more carbide have been added onto the chamfer, which is located just above oil storage port. This feature helps to prolong bit life by reducing the back reaming wear on the lug area especially in the scenario of a collapsed hole.
F feature: Cone auxiliary carbide protection
Auxiliary carbides are embedded in between the main cutting rows and outer rows on each cones, effectively protecting the cone body from erosion and enhancing drill bit life in abrasive formations.
C feature: Centre nozzle port
The centre nozzle port helps to clean the cuttings around the bottom of the drill bit, accelerates the bailing of cuttings, reducing the cone edge wear and increases the drill bit penetration rate.
R feature: Shirttail hardfacing(W feature)and lug back strengthening(G feature)
Shirttail hardfacing (W feature) and lug back strengthening (G feature) can effectively reduce wear on lug while improving the drill bit gage performance and bit life.
W feature: Shirttail hardfacing
WC (tungsten carbide) wear-resistant material is welded on the lug shirttail, which effectively reduces wear, protects the sealing structure, and prolongs the life of the bit.
B feature: Cone groove/bevel hardfacing
WC (tungsten carbide) wear-resistant material is welded on the cone groove or bevel to protect cone body against wear and enhancing bit life in abrasive formations.
The common failure types for tricone bits are bearing failure, cutting structure failure, and cone body wear.
| Failure types | Failure image | Recommendation | Image |
| Bearing failure |
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Recommend sealed bearing |
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| Broken Insert (Cutting rows) |
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Select a bit suitable for harder formation |
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| Broken Insert (Gage rows) |
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Choose the feature F for drilling in soft formation to reduce cone body wear |
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| Broken Insert（Coring） |
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Choose the feature F for drilling in hard formation to reduce cone body wear |
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| Shirttail and lug back wear |
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Choose the feature R for strengthened shirttail and lug back protection |
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| Wear on the top of lug back |
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Choose the feature R with protection on the top of lug back |
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