Custom Milled Tooth Bit Manufacturer in China

We offer high-performance milled tooth bits, engineered for efficient drilling in soft to medium-hard rock formations. Our bits feature robust steel teeth designed for optimal cutting, scraping, and gouging action, ensuring effective penetration and debris removal. Experience reliable performance and cost-effectiveness for your project, from water well to shallow oil and gas drilling.

Sinodrills - Your Trusted Milled Tooth Bit Manufacturer from China

Sinodrills is your trusted milled tooth bit manufacturer from China. We specialize in producing high-quality bits for soft to medium-hard rock formations. Our advanced manufacturing processes ensure precision-engineered steel teeth for optimal cutting, superior performance, and extended bit life. Partner with Sinodrills for reliable and cost-effective drilling solutions for your projects.

Various Milled Tooth Bit

mill tooth drill bit

We offer a full range of milled tooth drill bits, expertly manufactured in Qingdao, Shandong, China. Designed for optimal performance in soft to medium-hard rock formations, our bits feature precision-milled steel teeth for superior cutting and gouging action. We provide various sizes and IADC codes to ensure you get the perfect bit for efficient and cost-effective drilling in your specific project.

MT tricone drill bit

Sinodrills offers premium MT (Milled Tooth) tricone drill bits, meticulously engineered for optimal performance in soft to medium-hard geological formations. Our bits feature robust, integrated steel teeth that deliver superior cutting and gouging action, ensuring efficient penetration rates and maximum footage. Trust Sinodrills for durable, cost-effective drilling solutions tailored to your project’s needs.

three rolling cone milled tooth bit for drilling well

We offer robust three-rolling cone milled tooth bits, specifically designed for efficient well drilling. Ideal for soft to medium-hard formations, these bits feature precisely engineered steel teeth that provide aggressive cutting and scraping action, ensuring rapid penetration and effective borehole cleaning. Trust Sinodrills for durable and cost-effective solutions to meet your drilling demands.

custom MT drill bit for well

We specialize in crafting custom milled tooth (MT) drill bits precisely engineered for your well drilling projects. From unique formation challenges to specific performance requirements, our expert team designs and manufactures MT bits with optimized tooth configurations and robust bearing systems. This ensures maximum efficiency, durability, and cost-effectiveness for your specific well.

Steel milled tooth drill bit

We offer robust steel milled tooth drill bits, engineered for efficient drilling in softer to medium-hard geological formations. Featuring precision-milled steel teeth, these bits deliver superior cutting and gouging action, ensuring high penetration rates and effective rock removal. Our bits provide a cost-effective and reliable solution for various drilling applications, including water wells and shallow oil and gas exploration.

milled tooth rotary tricone bit for water well drilling

We offer a wide range of milled tooth rotary tricone bits specifically designed for water well drilling. Our bits deliver optimal performance in soft to medium-hard formations, providing excellent penetration rates and efficient rock removal. With durable steel teeth and robust construction, these bits ensure reliability and cost-effectiveness for your water well projects, from shallow boreholes to deeper applications.

milled tooth bits for oil well drilling

We offer milled tooth bits specifically designed for oil well drilling. Our bits are engineered for optimal performance in soft to medium-hard formations, including shales, limestones, and sandstones. Featuring durable steel teeth and robust construction, they deliver efficient cutting and gouging action, ensuring faster penetration rates and reliable operation in challenging downhole conditions.

Customize Your Desired Milled Tooth Bit

Tooth Geometry and Spacing

The shape, length, and spacing of the steel teeth are crucial. For softer formations, longer, more widely spaced teeth with aggressive chisel shapes promote efficient gouging and cutting. In contrast, harder formations require shorter, blunter, and more closely spaced teeth to handle the increased crushing forces and abrasion, preventing premature wear and tooth breakage.

Cone Offset and Profile

Cone offset refers to how much the cones are shifted from the bit’s center, influencing the scraping and twisting action. A higher offset is beneficial for softer formations to enhance the cutting efficiency. The cone profile (the shape of the cone itself) also plays a role, affecting how the bit contacts the bottom hole and distributes the load, impacting stability and penetration.

Hardfacing Application

While milled tooth bits are made of steel, their lifespan can be significantly extended through strategic hardfacing. Applying wear-resistant materials, like tungsten carbide chips or powder, to the tooth crests and flanks, and even the shirttail, dramatically improves abrasion resistance. This customized hardfacing targets high-wear areas, maintaining cutting structure integrity longer.

Bearing and Seal Selection

The bearing and seal system determines the bit’s operational life, especially at higher RPMs and weights on bit. For more demanding applications, upgraded sealed bearings with advanced lubrication systems offer enhanced durability and heat resistance compared to open bearings. Selecting the right bearing and seal type is critical for preventing premature failure and maximizing downhole time.

what is a Milled Tooth Bit?

A milled tooth bit, also known as a steel tooth bit, is a type of roller cone drill bit characterized by its cutting teeth being an integral part of the bit cone itself. These teeth are machined or “milled” directly from the steel of the cone, allowing for a variety of shapes and sizes depending on the intended rock formation.

Milled tooth bits primarily break rock through a gouging, scraping, and chipping action, making them particularly effective in softer to medium-hard geological formations like shale, limestone, and sandstone, where their aggressive cutting structure can efficiently remove material.

While less durable than tungsten carbide insert (TCI) bits in abrasive conditions, their lower manufacturing cost and effective performance in appropriate formations make them a popular choice for various drilling applications.

what is milled tooth bit used for?

A milled tooth bit is primarily used in drilling applications where the rock formations are soft to medium-hard. Its design, featuring steel teeth milled directly from the bit cone, makes it highly effective at gouging, scraping, and chipping away at these less abrasive formations.

Common applications for milled tooth bits include:

Oil and Gas Drilling: Often used in the upper sections of wells, or in fields with prevalent soft sedimentary rocks like shales, limestones, and sandstones.
Water Well Drilling: Ideal for penetrating common water-bearing formations that are typically softer.
Geothermal Drilling: Can be employed in various geothermal applications, depending on the rock types encountered.
Mining Operations: Used for drilling blast holes or exploration in softer ore bodies.
Construction: Applicable in foundational drilling and other construction projects involving softer ground.

What is the difference between milled tooth bit and insert bit?

Milled tooth bits and insert bits (often referred to as TCI or Tungsten Carbide Insert bits) are both types of roller cone drill bits, but their fundamental difference lies in their cutting structure and the types of formations they are designed to drill. This distinction heavily influences their performance, durability, and cost.

A milled tooth bit features cutting teeth that are integrally machined or “milled” directly from the steel material of the bit’s cones. These steel teeth come in various shapes and sizes, optimized for specific rock characteristics. Milled tooth bits primarily utilize a gouging, scraping, and chipping action to break rock.

Cutting Structure: Steel teeth milled directly from the cone material.
Rock Breaking Mechanism: Primarily gouging, scraping, and chipping.
Formation Suitability: Best for soft to medium-hard, less abrasive formations (e.g., shale, soft limestone, sandstone).
Durability: Generally less durable in hard or abrasive formations as the steel teeth wear down relatively quickly.
Cost: Typically less expensive to manufacture.

An insert bit, on the other hand, utilizes individual tungsten carbide inserts (TCIs) that are pressed into pre-drilled holes on the surface of the bit cones. Tungsten carbide is an extremely hard and wear-resistant material.

These inserts come in various shapes (e.g., conical, spherical, chisel) and are designed to break rock through a combination of crushing, impact, and some shearing.

Cutting Structure: Separate tungsten carbide inserts pressed into the cone.
Rock Breaking Mechanism: Primarily crushing and impact, with some shearing.
Formation Suitability: Suitable for a much wider range of formations, including medium-hard to extremely hard and abrasive rocks.
Durability: Significantly more durable and wear-resistant, leading to longer bit life in challenging conditions.
Cost: Generally more expensive due to the material cost and manufacturing process.

What is the best bit for oil drilling?

There isn’t one “best” drill bit for all oil drilling applications; the optimal bit selection is highly dependent on the specific geological conditions and drilling objectives. However, Polycrystalline Diamond Compact (PDC) bits are widely considered among the most efficient and preferred choices in modern oil and gas drilling due to their high rate of penetration and long lifespan in many formations.

PDC bits excel in homogeneous soft to medium-hard formations by shearing the rock, offering continuous cutting action with no moving parts, which minimizes wear and tear. They are known for their ability to achieve high rates of penetration (ROP) and extended bit runs, reducing the need for costly trip times.
Roller cone bits (including both milled tooth and TCI types) remain crucial for a wide range of formations, particularly those that are highly interbedded, abrasive, or extremely hard, where the crushing and impact action is more effective.
Diamond bits are specialized for the hardest and most abrasive formations, offering exceptional longevity but often at a higher initial cost and potentially slower ROP in some scenarios.

Ultimately, the best bit is chosen through careful analysis of the rock formation’s hardness, abrasiveness, and homogeneity, along with drilling parameters like weight on bit, RPM, and drilling fluid properties.

How to use milled tooth bit?

Using a milled tooth bit effectively involves optimizing a combination of drilling parameters to suit the specific soft to medium-hard rock formation being drilled. The goal is to maximize the Rate of Penetration (ROP) while ensuring the bit’s longevity and preventing damage to the drilling assembly.

Weight on Bit (WOB): For milled tooth bits, a moderate to high WOB is typically applied. This pressure helps the steel teeth to effectively gouge and crush the rock. Too little WOB will result in slow penetration, while excessive WOB can prematurely wear out the teeth or damage the bit’s bearings, especially in harder stringers within soft formations.
Rotary Speed (RPM): Milled tooth bits generally perform well with moderate to high RPMs in softer formations. The higher rotational speed enhances the cutting and scraping action, contributing to a faster ROP. However, in slightly harder or more interbedded soft formations, a balance must be struck to avoid overheating the bearings or excessive vibration.
Drilling Fluid Hydraulics: Maintaining optimal drilling fluid flow and pressure is crucial. The drilling fluid (mud) serves to cool the bit, lubricate the bearings, and, most importantly, carry rock cuttings away from the bit face and up the annulus. Proper hydraulics prevent bit balling (where cuttings build up and clog the bit’s teeth), which can severely reduce ROP and lead to bit damage.
Formation Understanding: Knowing the specific characteristics of the rock formation is paramount. Milled tooth bits are designed for soft to medium-hard formations; attempting to drill excessively hard or abrasive rock with them will lead to rapid wear and inefficient drilling. Drillers must monitor drilling parameters (like torque and ROP) and adjust accordingly as formation changes are encountered.

why choose our milled tooth bit?

When selecting a drill bit, choosing the right manufacturer is as crucial as choosing the right bit type. Here’s why you should choose our milled tooth bits, particularly for your soft to medium-hard formation drilling needs:

Optimized Performance for Target Formations: Our milled tooth bits are specifically engineered for maximum efficiency in soft to medium-hard rock. We leverage precise tooth geometry, spacing, and robust steel construction to ensure aggressive cutting, gouging, and chipping action, leading to faster penetration rates and reduced drilling time in formations like shale, sandstone, and soft limestone.
Enhanced Durability and Lifespan: We utilize high-quality steel alloys and advanced heat treatment processes in manufacturing. Furthermore, our bits often incorporate strategic hardfacing on the teeth and shirttail. This superior material and manufacturing quality significantly extends the bit’s lifespan, even in demanding conditions, minimizing the need for frequent bit changes and reducing costly downtime.
Cost-Effectiveness: While initial costs can vary, our milled tooth bits offer exceptional value. Their optimized design for relevant formations translates to higher ROP and extended durability, which collectively lower the overall cost per foot drilled. We provide competitive pricing without compromising on the quality and performance essential for your project’s success.
Customization and Versatility: We understand that every drilling project is unique. We offer a range of customization options for tooth geometry, cone offset, and hardfacing applications, allowing you to tailor the bit precisely to your specific drilling parameters and geological requirements. This adaptability ensures that our milled tooth bits perform optimally, whether for oil and gas, water well, or mining applications.

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All-in-one Milled Tooth Bit Solutions for Your Project

From Sinodrills, discover all-in-one milled tooth bit solutions for your project. Our milled tooth bits excel in soft to medium-hard formations, offering superior cutting and optimized penetration. We provide customized designs and robust construction for extended bit life and cost-effective drilling, tailored to your specific requirements and geological conditions.