Premium geotechnical drilling rigs engineered to work seamlessly with CE-certified double core barrels under extreme torque limits.
A technical white paper on maximizing core recovery, minimizing wear-cycles, and optimizing shear stress in deep excavation engineering.
The primary advantage of the Double Core Barrel over single-walled variants lies in its decoupled dual-tube design. The outer tube rotates driven by the rotary drive's kelly bar connection, applying torque to the cutting ring loaded with tungsten carbide or diamond teeth. Simultaneously, the inner tube remains static or rotates independently on specialized high-load bearing blocks. This layout reduces friction against the gathered rock core sample, avoiding sample degradation, washing erosion, and borehole wall collapse.
Drilling fluid (water, polymer, or bentonite slurry) is routed down the annulus between the inner and outer barrel walls. This prevents the high-velocity fluid stream from scouring the extracted core sample directly. The core is protected from hydraulic washouts, ensuring an accurate Geological Strength Index (GSI) representation of fractured or weak rock layers. This is critical for infrastructure projects requiring exact load-bearing data.
In hard rock drilling (compressive strength > 60 MPa), standard augers fail due to cutting resistance. A double core barrel acts as an annular ring cutter, carving a cylindrical slot into the rock. Once the tool reaches full depth, the rock core is sheared at its base using core lifters or ring catchers and brought to the surface. By utilizing CE-certified double core barrels, global contractors achieve superior core recovery rates (RQD close to 100%) even in highly fractured granite or limestone formations.
Why Sinovo Heavy Industry provides the optimal cost-to-performance ratio for complex piling tools worldwide.
We source heavy-duty, high-tensile structural steel plates (such as Q355B and custom 25CrMo4 alloys) from leading domestic steel bases. The tube walls are reinforced with carbide wear strips to prevent premature abrasion when boring in hard abrasive quartz formations.
Piling tool failure often occurs at welded connections. At our 7,800 sqm manufacturing base, automated welding systems perform submerged arc welding under strict thermal monitoring. This minimizes heat-affected zone brittle zones, keeping the kelly box structural connection secure.
Our modern production facility is located in the Hebei Xianghe Demonstration Zone, situated just 100 kilometers from Tianjin Port. This strategic proximity lowers inland transport costs and guarantees prompt shipment schedules for global customers.
Combining heavy-duty machining centers, advanced heat treatment processes, and skilled metallurgical engineers, Sinovo provides drilling tools with a service life that meets or exceeds European brand standards, while maintaining an competitive and transparent quoting structure.
How Sinovo aligns its manufacturing standards with rigorous European safety directives for risk-free importing.
Importing drilling equipment into Europe or working on large-scale international projects requires adherence to safety directives. Our double core barrels conform to the essential health and safety requirements of the Machinery Directive 2006/42/EC and the applicable harmonized standard EN 16228 (Drilling and foundation equipment - Safety).
Sinovo heavy-industry equipment and tools undergo audits by European Notified Bodies, ensuring all drilling machinery can be imported and operated without legal or compliance barriers. This compliance is essential for high-profile civil engineering projects in regions like the EU, Singapore, Australia, and North America, where strict safety regulations apply.
Explore how Sinovo drilling rigs and specialized piling tools perform in diverse and demanding geological environments worldwide.
Supporting large-scale deep foundation works in soft alluvial delta soils.
Boring through hard, abrasive limestone strata for urban infrastructure.
High-precision urban piling through variable marine clay layers.
Advanced hydraulic pressing systems for silent, low-vibration pile installation.
Securing high torque output in high-temperature desert environments.
Optimized drilling parameters and kelly bar setup for rock socketing.
Heavy-duty geological and deep water well drilling in remote regions.
High-efficiency piling under challenging regional geological structures.
Complex bridge foundation construction through coastal sedimentary rock layers.
A trusted global supplier of heavy construction machinery, geotechnical exploration rigs, and specialized tooling solutions.
SINOVO Group is a professional supplier of construction machinery equipment and construction solutions. We operate across construction machinery, exploration equipment, import-export representation, and construction scheme consulting, serving piling and drilling operations worldwide.
Our core team has been active in the construction machinery sector since the early 1990s. Over more than 20 years of development and innovation, the company has established long-term strategic alliances with top global equipment manufacturers and leading manufacturers in China, receiving multiple awards for engineering machinery export projects.
Our business scope is focused on piling machinery, hoisting equipment, water well drilling systems, and geological exploration tools. Today, SINOVO Group has active trade relationships with more than 120 countries and regions, forming a diversified sales and support network across five continents.
Beijing Sinovo International & Sinovo Heavy Industry Co. Ltd. are ISO9001:2015 certified manufacturers of drilling rigs and piling rigs. Since our inception, we have been committed to providing high-quality drilling equipment to global customers. Our production base occupies an area of 7,800 square meters and is equipped with over 50 pieces of heavy manufacturing equipment.
To satisfy increasing market demands, we continually work to expand our capacity. Our current annual production capacity includes: 1,000 units of core drilling rigs, 250 units of water well drilling rigs, and 120 units of rotary drilling rigs. Our engineering teams design electronic hydraulic control and drive systems that help keep our drilling equipment competitive in the international market.
Ensuring operational efficiency and minimized downtime through structured technical services.
We provide comprehensive engineering data and custom design advice before purchase. Our engineers analyze soil profiles, rock hardness, and rig parameters to match the double core barrel size, cutter layout, and kelly box dimensions to your project.
We send experienced service engineers to project sites to assist with commissioning, conduct trail drilling runs, and train local operators. For rigs equipped with CAT undercarriages, customers can access maintenance support via the local Caterpillar service network.
We offer a one-year warranty on our main drilling equipment structures. Normal wearing parts and consumables are excluded, but structural frames and hydraulic control systems are covered, with replacement parts provided under clear terms.
Explore our highly-requested core drill configurations and auxiliary demolition equipment.
To make customers feel secure in using our products we establish a complete after-sales service system.
View More →
We have a number of professional technical personnel, to ensure that all aspects of the product are optimized.
View More →
During the warranty period, we provide free debugging, operator training, and maintenance service.
View More →Our commitment to international quality, manufacturing safety, and intellectual property protection.
B2B technical checklist for procurement managers evaluating total cost of ownership (TCO) for double core barrels.
| Outer Diameter (mm) | Inner Diameter (mm) | Kelly Box Connection (mm) | Recommended Rock Compressive Strength | CE Certification Standard |
|---|---|---|---|---|
| 600 mm | 480 mm | 130 x 130 / 150 x 150 | Soft to Medium Strata (20 - 50 MPa) | EN 16228 / Machinery Directive 2006/42/EC |
| 800 mm | 660 mm | 150 x 150 / 200 x 200 | Medium to Hard Rock (50 - 90 MPa) | EN 16228 / Machinery Directive 2006/42/EC |
| 1000 mm | 840 mm | 200 x 200 / Custom Box | Hard Granites / Basalts (> 100 MPa) | EN 16228 / Machinery Directive 2006/42/EC |
| 1200 mm + | Custom Specified | Custom Box Adaptor | Ultra-Hard Structural Formations | EN 16228 / Machinery Directive 2006/42/EC |
While the initial quote is a key factor in tool procurement, experienced EPC managers evaluate the Total Cost of Ownership (TCO). Selecting lower-grade steel or tools without certified welding can lead to failure at the Kelly Box connection. If a tool breaks down inside a deep borehole, recovery operations can cause project delays that far exceed the cost of purchasing higher-quality, certified equipment.
Our standard quotation template includes detailed itemization: material certifications, hard-facing options (such as tungsten carbide overlay), tooth style configurations (flat teeth or round-shank chisel bits), and freight estimates to the port of destination. We work to provide transparent pricing and terms for our global clients.
Detailed engineering answers regarding CE-certified core barrels, hydraulic pile breakers, and rotary rig compatibility.
Explore our heavy-duty rotary drilling rigs, casing rotators, and specialized construction machinery.
SINOVO
