Explore our foundational engineering machinery and rotary drilling rigs, built to international safety standards.
High-power water well exploration and construction drilling equipment engineered for deep strata operation.
Efficient mechanical concrete pile breaking equipment ensuring rapid foundation structural trimming.
Globally compliant drilling unit featuring high performance standards and robust hydraulic configurations.
Crawler-mounted grouting unit optimized for soil stabilization, anchor drilling, and foundation repairs.
Multifunctional engineering crawler rig configured for tunneling supports and rock-bolt construction.
Heavy-duty hoisting machinery designed specifically for ground compaction and soil stabilization works.
Extreme depth hydraulic drilling rig engineered for geological exploration and high-volume wells.
Trenchless drilling equipment for urban piping networks, public utilities installation, and underground cable routing.
In deep foundation construction, high-torque transfer systems are vital for drilling through hard rock and complex geological formations. Global infrastructural projects demand engineering tools that withstand immense stress under cyclic loads.
The Interlocking Kelly Bar is the core mechanism that transfers rotation and crowd force from the rotary drive of the drilling rig down to the boring tool. Unlike friction kelly bars, which rely on mechanical friction between steel sleeves to drive tools down, interlocking bars use mechanical locks (drive ribs and locking pockets) to positively lock the telescopic tubes together. This positive locking enables the transfer of maximum vertical pressure directly to the pile bottom, facilitating cutting into stubborn rock layers like basalt, granite, or highly cemented conglomerates.
Globally, urban development projects, bridge expansions, and heavy industrial facilities require deeper bored piles with large diameters. Achieving these specifications requires telescopic kelly bars that balance overall weight against structural strength. Manufacturers must integrate premium metallurgy, precision engineering, and specialized design to ensure durability on site.
During deep drilling operations, a standard friction bar might stall or experience slippage as it reaches denser geologic strata. An interlocking kelly bar bypasses this physical limitation. The positive mechanical lock permits the operator to direct the full crowd force of the rotary rig onto the drilling bit, accelerating penetration rates in hard formations.
| Performance Indicator | Interlocking Kelly Bar | Friction Kelly Bar | |
|---|---|---|---|
| Primary Geological Suitability | Hard rock, highly weathered bedrock, high-density gravel | Soft clays, silt, sand, medium-hard gravel formations | Soft to medium rock and soil mixtures |
| Crowd Force Mechanism | Positive mechanical drive key locking pockets | Frictional contact via guide/drive strips | Standard hydraulic crowd transmission |
| Bored Pile Penetration Rate | High in hard rock; consistent torque output | High in soil; drops significantly in solid rock | Variable depending on ground density |
| Operator Skill Requirement | High (requires alignment of interlocking slots) | Medium (simple descent and hoisting) | Medium |
| Long-term Maintenance Cost | Medium-High (requires drive key repairs over time) | Low (fewer mechanical wearing parts) | Medium |
SINOVO Group utilizes high-precision processing and raw materials sourced from reliable steel mills to manufacture durable kelly bars. Our facility leverages advanced metallurgical processes to optimize the strength-to-weight ratio of our equipment.
Our production facilities benefit from a centralized industrial supply chain, providing several key advantages:
SINOVO Group is a supplier of construction machinery equipment and construction solutions, serving global construction machinery and exploration industry suppliers.
Since the early 1990s, the core team members of the company have been serving in the construction machinery sector. After more than 20 years of development and innovation, the company has established long-term strategic alliances with equipment manufacturers in China and globally, earning recognition in engineering machinery and equipment export projects.
The business scope of SINOVO Group focuses on pile construction machinery, hoisting, water well drilling, and geological exploration equipment, as well as customized machine and tool solutions. It has established trade relations with more than 120 countries and regions worldwide, creating a diverse marketing, sales, and service network.
Our products have successively obtained ISO9001:2015 certification, CE certification, and GOST certification. Our piling machinery has established a strong brand presence in Southeast Asia and African exploration markets. Additionally, design and support services in Singapore, Dubai, and Algiers provide global technology and spare parts supply to ensure quality after-sales service.
In 2008, the company integrated operations and established TEG FAR EAST in Singapore to expand in the Southeast Asian market. In 2010, the group invested in a production and manufacturing base in the Hebei Xianghe emerging industry demonstration zone. Covering an area of 67 mu with an investment of 120 million yuan, this base focuses on the R&D and manufacturing of pile engineering machinery, hoisting, water well drilling, and geological exploration equipment. Located in Xianghe Industrial Park, it is 100 km from Tianjin Port, helping to optimize logistics and transportation costs.
Beijing Sinovo International & Sinovo Heavy Industry Co. Ltd. are ISO9001: 2015 certified manufacturers of drilling rigs and piling rigs. We operate a production base that occupies 7,800 square meters and is equipped with over 50 pieces of specialized equipment. Our current annual production capacity includes 1,000 core drilling rigs, 250 water well drilling rigs, and 120 rotary drilling rigs. Our engineers work at the forefront of electronic hydraulic control and drive systems, helping to keep our drilling equipment competitive in global markets.
SINOVO Group supports customers with a complete service structure, offering warranty coverage and on-site support to ensure equipment reliability.
Explore the specific parameters and operational capabilities of our core geotechnical engineering machinery lines.
A versatile engineering drilling machine combining 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 excellent geological adaptability and operational convenience.
Utilizes high-pressure hydraulic oil and oblique wedge principles to generate splitting forces from hundreds to thousands of tons. This industrial-grade equipment splits massive boulders within seconds, efficiently separating hard ore from rock formations. Compact, lightweight, and ideal for quarrying, mining, and urban excavation.
A self-erecting rig featuring advanced hydraulic load-sensing technology and integrated electronic controls. Designed for high efficiency and compact performance. Supports drilling with telescopic friction or interlocking Kelly bars as standard, and CFA drilling applications as an optional configuration.
Optimized for urban deep foundation pit support, soil nail walls, and highway slope stabilization. Supports pipe shed grouting, water stop grouting, rock blasting, and soft foundation reinforcement. Ideal for anchor drilling, down-the-hole vertical drilling, casing composite drilling, and single/double-tube rotary grouting.
Engineered for underground spaces, subways, highway bridges, and dam foundation reinforcement. Supports pipe diameters of 89~142mm for multi-tube vertical/horizontal construction, as well as general rotary jet (swing/fixed spray) engineering. Equipped with a 3-ton crane arm to reduce manual labor intensity.
Built on a modified loader chassis, this system is optimized for small-diameter, shallow-depth foundation projects. It is designed for utility pole installation and solar photovoltaic ground screw pile drilling operations.
A dual-use water and gas rig designed for diverse operations. Suitable for anti-floating anchors, cable anchoring, slope support, high-pressure rotary spraying, tunnel grouting, casing drilling, and micro-pile installations.
Features a high-power top impact system that achieves drilling rates without separate down-the-hole hammers or auxiliary air compressors. Delivers high torque and rotation speeds, suitable for challenging formations like sand, gravel, and pebbles.
Designed for confined jobsites requiring small hole diameters (50-90mm). Lightweight and compact, it offers high mobility in rough terrains. Suitable for rock excavation, mining, urban construction, and tunnel drilling.
Designed for deep ground improvement. Main motor: 75KW, max pile diameter: 1200mm, drilling force: 460KN. Equipped with hydraulic walking mechanisms and robust chain drives (36A) for continuous site operation down to 28m.
Our operations adhere to strict international standards for engineering, manufacturing safety, and export quality.
Patent certificate (1)
Patent certificate (2)
Patent certificate (3)
Patent certificate (4)
Patent certificate (5)
Patent certificate (6)
GOST Certificate (1)
GOST Certificate (2)
SINOVO regularly participates in trade events and opens its doors for manufacturing tours to demonstrate our quality standards.
SINOVO equipment is deployed on construction sites worldwide, supporting critical infrastructure, power, and civil engineering projects.
Sinovo crawler crane supporting infrastructure construction in Bangladesh.
Sinovo drilling rig operating in challenging desert conditions in Saudi Arabia.
Sinovo rotary drilling rig working on high-density bored piling projects in Singapore.
The Sinovo hydrostatic machine during foundation works in Bangladesh.
The Sinovo rotary rig performing deep geological drilling in Saudi Arabia.
The Sinovo water well rig operating in remote locations within DR Congo.
Choosing the appropriate kelly bar configuration requires balancing drilling rig parameters with geological conditions and budget constraints.
When requesting custom ODM/OEM interlocking kelly bars, engineering departments should verify the following parameters:
Using an interlocking kelly bar requires the operator to align the locking pockets before applying crowd force. Proper training and site monitoring help prevent premature wear on the locking mechanism and drive keys.
Answers to common technical and commercial inquiries regarding our manufacturing capabilities and products.
View our complete range of specialized drilling platforms, directional systems, and construction support components.
Compact directional utility drilling rig optimized for municipal pipe networks and public utility line routing.
100-meter deep-hole rotary rig designed for heavy foundation pile applications in deep civil engineering.
High-capacity core exploration rig designed to reach depths of 2000m in mineral exploration programs.
Heavy-duty fluid swivel components engineered for high-pressure slurry circulation in rotary drilling.
55-ton crawler crane configured to provide stable hoisting and support for foundation operations.
Heavy mineral exploration exploration rig built to output stable cores at deep rock depths.
High-capacity slurry purification unit designed to separate sand and silt particles from drilling muds.
Trailer-mounted flexible geotechnical mobile exploration and water well drilling platform.
SINOVO