Explore SINOVO's high-efficiency geological exploration and rotary drilling rigs.
In structural foundation testing, mineral exploration, and civil engineering, the integrity of the recovered core sample determines the viability of multi-million dollar engineering designs. Single tube core barrels rotate with the diamond drill bit, creating friction that often fragments friable rock or washes away soft strata. To mitigate this sample degradation, geotechnical contractors utilize a Double Tube Core Barrel.
A double tube core barrel comprises two concentric tubes: the outer tube, which connects to the drill string and rotates with the bit, and the inner tube, which remains stationary on a bearing assembly. The drilling fluid travels between the inner and outer tubes to cool the diamond matrix bit and clear cuttings. This configuration isolates the core sample from structural rotational forces and contact with high-pressure wash fluids, maintaining undisturbed cores in complex stratigraphy.
Depending on target formations and the depth of geological operations, buyers select specific double-tube models. Standard structural profiles include:
| Series Type | Outer Diameter (OD) | Inner Core Diameter | Primary Lithological Formations | Standard Core Recovery Ratio |
|---|---|---|---|---|
| T2-76 | 75.7 mm | 61.0 mm | Medium-hard formations, concrete coring | 88% - 94% |
| T2-86 | 85.7 mm | 72.0 mm | Fissured limestone, granite, schist | 90% - 96% |
| T2-101 | 100.7 mm | 84.0 mm | Soft weathered strata, alluvial silt, mudstone | 92% - 98% |
| HQ (Wireline) | 96.0 mm | 63.5 mm | Deep stratigraphic mineral deposits, basalt | 95% - 99% |
| PQ (Wireline) | 122.6 mm | 85.0 mm | Highly broken, coal, loose clay formations | 96% - 99.5% |
A trusted manufacturer of piling machinery, water well drilling, and geological exploration systems.
SINOVO Group is a professional supplier of construction machinery equipment and construction solutions. Engaging in the field of construction machinery, exploration equipment, import/export agency services, and construction scheme consulting, we have served global exploration suppliers for decades. Our backbone members have operated in the construction and drilling sector since the early 1990s, building strategic alliances with top global and domestic equipment manufacturers.
Our manufacturing base in Xianghe Industrial Park is situated 100 km from Tianjin Port, reducing domestic transit times and export transportation costs. This facility occupies 7,800 square meters and features over 50 pieces of heavy industrial equipment. Beijing Sinovo International & Sinovo Heavy Industry Co. Ltd. are ISO9001:2015 certified manufacturers, with annual production capacities of 1,000 core drilling rigs, 250 water well drilling rigs, and 120 rotary piling rigs.
All products carry ISO9001:2015, CE, and GOST (TR) certifications, confirming adherence to European Economic Area and Eurasian Customs Union directives.
Standard components ship within 10 to 15 days, supported by proximity to Tianjin Port and integrated logistics networks.
In-house technical R&D center provides bespoke core barrel designs, hardened inner tubes, and specialized thread adapters.
Years of Industry Experience
Exporting Countries & Regions
Annual Core Rig Production Units
Industrial Design Patents
The search query "Discount Double Tube Core Barrel Suppliers & Pricelist" highlights a key industry reality: drilling companies face thin margins and high consumable costs. Procuring double tube core barrels directly from Chinese manufacturing clusters offers distinct structural cost advantages:
Lower pricing is only effective if the equipment performs reliably under load. SINOVO Group ensures quality through global field support and quality compliance:
SINOVO machinery and drilling equipment deployed on international projects.
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Detailed performance parameters for key SINOVO products.
The SK666 Micro Pile Drilling Rig is a versatile engineering drilling machine that combines efficiency, flexibility, and stability. Specifically designed for large-diameter, high-precision drilling operations. Widely used in micro pile, photovoltaic hole, anchor bolt hole, casing hole, and blasting hole construction, it offers high geological adaptability and operational convenience.
Utilizes high-pressure hydraulic oil as its power source, applying advanced oblique wedge principles to generate splitting forces ranging from hundreds to thousands of tons. This industrial-grade equipment can split massive boulders within seconds, separating hard ore from rock formations. Compact design, highly suitable for quarrying, mining, and infrastructure projects.
TR60 rotary drilling rig is a self-erecting rig incorporating hydraulic load-back technology and electronic control systems. Designed for telescopic friction or interlocking Kelly bars, with options for Continuous Flight Auger (CFA) applications. Compact structure, suitable for low headroom environments.
Applications:
1. Deep foundation pit support, soil nail wall support, railway and highway slope support.
2. Anti-floating anchor rods, thin underground continuous walls, and tunnel pipe shed grouting.
3. Rock and soil blasting hole construction for mines and dams.
4. Can be configured for single tube and double tube rotary grouting systems.
Suitable for urban underground spaces, subways, highways, and bridge base reinforcements. The rig handles multi-tube vertical/horizontal construction for diameters from 89mm to 142mm. Features a 3-ton crane arm to reduce manual handling on site.
Technological developments shaping core extraction efficiency.
Several performance trends shape the procurement of double tube core barrels:
High rotational speeds create friction at the drill head, causing outer tubes to distort. Premium manufacturers now use heat-treated 4130 alloy steel. This steel increases yield strength, allowing the barrel to resist torque in deep and directional holes.
The bearing assembly is critical to double tube performance. Dual thrust and needle bearing configurations isolate the inner tube, preventing rotation even when drilling through abrasive sands and gravels.
To prevent sample sticking and structural wear, inner tubes are increasingly finished with chrome plating or treated with anti-corrosive coatings. This treatment ensures easy core extraction and protects the tool when drilling with acidic flush fluids.
Core barrel pricing varies based on raw material quality, manufacturing tolerances, and component choices. Understanding these factors helps procurement managers optimize purchasing budgets:
Standard carbon steel tubes are less expensive but wear faster. Premium cold-drawn seamless alloy steel (4130/4140 chromoly) costs 20% to 30% more upfront but lasts longer, reducing the total cost per meter drilled.
The choice of diamond core bit (impregnated vs. surface set) impacts the pricing of the core barrel kit. Choosing matching reaming shells and core lifters from a single supplier ensures thread compatibility and reduces wear.
Procuring in standard container lots of 50 to 100 sets reduces unit pricing. SINOVO Group offers structured pricing discounts for volume orders, supporting exploration programs and distributor inventories.
Technical answers to common procurement and operational questions.
Single tube barrels rotate with the bit, exposing the core to torque and flush fluids. Double tube barrels feature a stationary inner tube that protects the sample. Triple tube barrels add a split inner liner to facilitate core extraction in extremely soft or fractured formations.
Core barrels must match the thread pattern of the drill string (e.g., standard DCDMA, metric, or proprietary wireline threads). Using premium CNC-cut threads prevents joint leaks and preserves structural integrity under load.
Lifespan depends on formation abrasiveness, rotational speed, flushing fluid properties, and raw material quality. Heat-treated alloy steel barrels last longer in abrasive quartz or granite formations.
The bearing assembly isolates the inner tube from the rotation of the outer tube. If the bearings fail or bind, the inner tube rotates, causing sample fragmentation and core loss.
SINOVO leverages its proximity to Tianjin Port to manage ocean, rail, and air freight. We handle custom documentation, compliance certifications, and protective packaging for international transit.
Yes. Our engineering department designs and manufactures custom lengths, non-standard diameters, and specialized threads to match unique rig configurations and geological parameters.
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