Beijing Unidrill, located in Beijing, capital of china, is a technology-based corporation which integrates research and development of Kelly bars, augers, casings for rotary drilling rig and technical support services for construction with rotary drilling rigs together. Our core R&D personnel, technicians, manufacturing personnel are all from the best enterprises in the industry that have more than ten years of experiences in designing and manufacturing relevant products.
On the basis of integration of advanced manufacturing technologies at home and abroad and combined with local conditions, we strictly select top-quality steels from the best steel and iron manufacturers at home and abroad. Key components such as Kelly bars with drive square head, casing joints, pressure points etc are made of imported steels with special heat treatments and surface-strengthened treatments. Materials we select are not only with high yield strength, wear, impact and high strain resistant properties, but also with good welding and corrosion resistant properties, which meet the requirements for using products with high reliability in pile foundation construction.
Interlocking and friction Kelly bars manufactured by us have been successfully applied for drilling rigs of brands including Bauer, Soilmec, Liebherr, Casagrande, IMT, Sany, XCMG, Zoomlion, CSR, Sunward, Jintai, etc. We supplied friction kelly bars which can practically execute drilling to a depth of 148 meters, the deepest in soft soils conditions; For interlocking Kelly bars, we design customized 3-element, 4-element and 5-element interlocking Kelly bars, among which 5-element interlocking Kelly bar is firstly manufactured by domestic manufacturer. With the most mature manufacturing technology, 5-element interlocking Kelly bar has been successfully applied for XCMG550, TR550, SWDM520, XCMG400, TR460, XCMG360, SWDM360, TR280 drilling rig, etc., which effectively addresses the problem of deep hole rock drilling.
Based on years of experiences in construction with rotary drilling rig, we improve design of drilling tools for different soils conditions, such as angle for placement of teeth, number of teeth, thickness of tubes selected for drill body, etc to improve the wear resistance of drilling tools and drilling efficiency. Drilling tools we now manufacture include soil bailer bucket with single bottom, soil bailer bucket with double bottoms, rock-socketed bailer bucket with double bottoms, soil straight auger with single end and single screw, soil straight auger with double ends and single screw, soil straight auger with double ends and double screws, rock-socketed straight auger with single end and single screw, rock-socketed straight auger with double ends and single screw, rock-socketed conical auger with double ends and single screw, rock-socketed core barrel, cruccross core barrel, roller core barrel，clean-out auger, etc.
We also supply various supporting construction equipment and accessories, such as double-wall casing, drilling teeth, swivel head, Kelly guide, etc. Unidrill strives to be the world-class specialist in providing overall construction solutions for pile foundation, dedicated to serving all rotary drilling rig customers so as to build the best partnership with customers and achieve mutual benefit.