One-Piece Carbide Drag Bit for Soft Formation Drilling - ...

One-Piece Carbide Drag Bit for Soft Formation Drilling

Name: One-Piece Carbide Drag Bit for Soft Formation Drilling
Brand: 成辉钻具

Size: 133–317 mm
Cutting Material: Tungsten Carbide
Structure: One-Piece / Integral Drag Type
Application: Water Well / Grouting / Construction
Formation: Soil / Soft to Medium-Soft Rock
Thread: 3-1/2″ / 4-1/2″ Male Thread
Customization: Size / Cutter Layout / Thread

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Description

Product Snapshot

One-Piece Carbide Drag Bit for Soft Formation Drilling

One-Piece Carbide Drag Bit is designed for fast and economical non-coring drilling in soil, clay, mudstone, weathered rock and other soft to medium-soft formations. The integrated steel-body structure is equipped with wear-resistant tungsten carbide cutting elements, providing reliable cutting performance, wide cuttings-clearance channels and simple field operation.

Available in 133–317 mm sizes with 3-1/2″ and 4-1/2″ male thread options and customized configurations.

Size 133–317 mm	Cutting Material Tungsten Carbide	Structure One-Piece / Integral Drag Type
Application Water Well / Grouting / Construction	Formation Soil / Soft to Medium-Soft Rock	Thread 3-1/2″ / 4-1/2″ Male Thread

Customization

Size / Cutter Layout / Thread

Key Features

Simple structure, economical drilling

Six design advantages behind the One-Piece Carbide Drag Bit.

01 / 06

One-Piece Integrated Structure

The integrated body and blade design provides a simple and robust structure for general drilling applications.

02 / 06

Tungsten Carbide Cutting Elements

Wear-resistant carbide cutting elements improve cutting durability in soft and medium-soft formations.

03 / 06

Fast Penetration in Soft Formations

The scraper-style cutting structure efficiently shears soil, clay, mudstone and other soft formations.

04 / 06

Open Blade Design

Wide spaces between blades help improve cuttings removal and reduce blockage in loose formations.

05 / 06

Economical Drilling Solution

Carbide drag bits are often a practical, cost-effective option when expensive PDC cutters are not necessary for the formation.

06 / 06

Multiple Sizes & Threads

Different diameters and connection options are available for different drilling rigs.

Applications & Formations

Used across water well, grouting and construction drilling

This one-piece carbide drag bit is suitable for water well drilling, grouting holes, foundation drilling and construction drilling. Other applications include geotechnical drilling, shallow geothermal drilling, soft formation open-hole drilling and general engineering boreholes.

01 Water Well Drilling Fast penetration for water well projects in soil and soft formations.	02 Grouting Holes Reliable hole formation for grouting and foundation projects.
03 Construction Drilling Efficient drilling for construction and general engineering boreholes.	04 Soft Formation Drilling Scraper-style cutting for soil, clay, mudstone and weathered formations.

Suitable Rock Formations

Recommended primarily for soft to medium-soft sedimentary formations and loose ground conditions.

Soil	Clay	Sand	Mudstone	Sandy Mudstone
Soft Shale	Weathered Formations	Soft Sandstone	Other Soft to Medium-Soft Sedimentary Formations

⚠️ Selection note: For hard, highly abrasive or strongly fractured formations, PDC, roller-cone or other drilling structures may be more suitable. Please contact our engineers for alternative recommendations.

Technical Specifications

Standard sizes and carbide cutter configurations

Available from 133 mm to 317 mm. Cutter quantity, cutter layout and thread connection can be customized according to drilling requirements.

Bit Size	Thread Options	Carbide Cutter Configuration	Approx. Weight
133 mm	3-1/2″ / 4-1/2″ Male Thread	3 + 9	5.5 kg
165 mm	3-1/2″ / 4-1/2″ Male Thread	3 + 12	6.6 kg
190 mm	3-1/2″ / 4-1/2″ Male Thread	3 + 15	7.4 kg
215 mm	3-1/2″ / 4-1/2″ Male Thread	3 + 15	8.1 kg
240 mm	3-1/2″ / 4-1/2″ Male Thread	3 + 18	9.1 kg
317 mm	3-1/2″ / 4-1/2″ Male Thread	3 + 27	12.7 kg

Cutter Material: Tungsten Carbide

Customization: Size, cutter layout and thread connection can be customized according to project requirements.

Carbide vs PDC Drag Bit

Which drag bit should you choose?

Carbide and PDC drag bits are designed for different formations and drilling priorities. Carbide drag bits are economical soft-formation tools, while PDC cutters provide greater cutting durability and broader formation capability.

Feature	Carbide Drag Bit	PDC Drag Bit
Cutting Material	Tungsten carbide	Polycrystalline diamond compact
Best Formation	Soft / loose formations	Soft to medium-hard formations
Initial Cost	Generally lower	Generally higher
Wear Resistance	Good in suitable soft formations	Higher potential wear resistance
Structure	Simple and robust	More specialized cutter structure
Typical Use	Water well / construction / soil drilling	Water well / mining / anchor / harder formations

Choose Carbide

Choose a Carbide Drag Bit when:

—	Formation is relatively soft
—	Soil, clay or mudstone is dominant
—	A lower-cost drilling solution is preferred
—	Simple field inspection and maintenance are important
—	High-end PDC cutters are unnecessary

Choose PDC

Choose a PDC Drag Bit when:

—	Formation is more consolidated
—	Higher wear resistance is required
—	Longer drilling intervals are expected
—	Soft-to-medium-hard formations are encountered

Integrated One-Piece Design

Why the one-piece structure matters

The one-piece structure combines the main cutting body and blades into a robust assembly. This design is particularly suitable for large-diameter soft-formation drilling where structural simplicity and reliability are important.

Simple Structural Design A straightforward structure with fewer components for reliable operation.	Strong Blade Support The integrated blade support provides structural strength for large-diameter drilling.	Easy Inspection Simple field inspection and maintenance for reduced downtime.
Suitable for Large Diameters Good suitability for large-diameter soft-formation drilling projects.	Reduced Structural Complexity Fewer structural interfaces can simplify operation and reduce risk of failure.	Robust Field Handling One-piece bits are easy to handle and transport on site.

How to Select

How to select the right carbide drag bit

To recommend a suitable configuration, please provide the following information. Our engineers will respond with a factory quotation within 24 hours.

01 Required Diameter 133 / 165 / 190 / 215 / 240 / 317 mm	02 Formation Soil / Clay / Sand / Mudstone / Weathered Rock	03 Drilling Application Water Well / Grouting / Construction / Geotechnical
04 Thread Connection 3-1/2″ / 4-1/2″ or customized	05 Drilling Rig Information Rig model and drilling parameters.	06 Required Drilling Depth Planned drilling depth and depth range.

Factory Customization

Customized carbide drag bit solutions

Every drilling project is different. Chenghui Drilling customizes each carbide drag bit based on your project data — from blade geometry to thread connection.

Formation type, drilling rig, drilling parameters and required penetration rate all affect carbide drag bit performance. Our engineering team works with your technical data to recommend the most suitable cutter layout and blade structure.

— Bit Diameter	— Carbide Cutter Quantity
— Carbide Grade	— Cutter Arrangement
— Blade Geometry	— Thread Connection
— Gauge Structure	— Surface Coating
— OEM Marking	— Packaging

CNC machining of one-piece carbide drag bit

One-piece carbide drag bit assembly process

About Chenghui Drilling

Professional drilling tools manufacturer in China

Chenghui Drilling Co., Ltd. specializes in the design, production and supply of PDC drill bits, tricone drill bits, DTH drilling tools and related drilling equipment for customers worldwide.

Every drill bit is manufactured and inspected in our own factory, ensuring stable quality, competitive pricing and reliable delivery for international drilling contractors and distributors.

Supply Mode Factory Direct	制造业 In-House
Service OEM / ODM	Market Global Export

Chenghui Drilling Tools production workshop

Get In Touch

Need a customized One-Piece Carbide Drag Bit?

Share your drilling requirements with our engineers. We will recommend a suitable cutter layout and thread connection, and provide a factory quotation within 24 hours.

1. Required Diameter	2. Formation
3. Drilling Application	4. Thread Connection

📩 Request Quote
Contact Engineer

FAQ

1
What is a One-Piece Carbide Drag Bit?
+

A One-Piece Carbide Drag Bit is a non-coring drill bit with an integrated body and blade structure. It uses tungsten carbide cutting elements for efficient drilling in soft and medium-soft formations.

2
What formations are suitable for this carbide drag bit?
+

It is mainly suitable for soil, clay, sand, mudstone, soft shale, weathered rock and soft sandstone. For harder or highly abrasive formations, PDC or roller-cone bits may be more suitable.

3
What sizes are available?
+

Standard sizes include 133 mm, 165 mm, 190 mm, 215 mm, 240 mm and 317 mm. Customized diameters are also available according to drilling requirements.

4
What is the difference between a Carbide Drag Bit and a PDC Drag Bit?
+

Carbide drag bits are generally more economical and suitable for softer formations, while PDC drag bits provide higher wear resistance and are better suited to more consolidated or medium-hard formations.

5
Can you customize the Carbide Drag Bit?
+

Yes. We can customize bit diameter, carbide cutter quantity, carbide grade, cutter arrangement, blade geometry, thread connection, surface treatment, product marking and packaging according to your drilling project.

Downloads

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One-Piece Carbide Drag Bit for Soft Formation Drilling