Our company's ultra-large-diameter engineering drill bits have been perfectly applied in key national projects.
2015-06-11
On June 3, 2015, the Z05 main tower pier of the main bridge over the Guyu Gate waterway for the Fuping Railway’s Pingtan Strait Dual-Use Bridge—a key national project—successfully completed the concrete pouring of a 4.5-meter-diameter bored pile. This pile currently represents one of the largest-diameter foundation piles in the history of bridge construction. The drilling bit used for this borehole was custom-designed and manufactured by Luoyang Jiujiu Technology Co., Ltd., featuring an innovative structural design and robust welding techniques, which provided a solid foundation and ensured high-quality results for the smooth completion of Bored Pile No. 4 at the Z05 pier of the Pingtan Strait Dual-Use Cross-Sea Bridge. Additionally, all eight 4.5-meter-diameter drill bits and 20 4.0-meter-diameter drill bits supplied by our company were seamlessly integrated with the corresponding drilling rigs for this critical project.
On June 3, 2015, the Z05 main tower pier of the main bridge over the Guyumeng Channel on the Fuping Railway’s Pingtan Strait Dual-Use Bridge—a key national project—completed the concrete pouring for a 4.5-meter-diameter bored pile, which currently represents the largest-diameter pile foundation in the history of bridge construction.
The drill bit used in this drilling rig is a 4.5-meter-diameter bit designed and manufactured by Luoyang Jiujiu Technology Co., Ltd. Thanks to its innovative design structure and reliable welding technology, it has provided a solid foundation and ensured high-quality results for the successful completion of Drilling Pile No. 4, part of the Z05 bridge pier for the Pingtan Strait Rail-Car Dual-Use Cross-Sea Bridge. Additionally, all eight 4.5-meter-diameter drill bits and 20 4.0-meter-diameter drill bits supplied by our company were seamlessly matched with the corresponding drilling rigs for this project.
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Drilling Well Flushing Technology
Abstract：This paper introduces the three core functions of well flushing in drilling: cooling drilling tools, removing cuttings and cleaning the bottom, and supporting the wellbore. It expounds the characteristics and selection requirements of four types of well flushing media. The two mainstream well flushing processes, direct circulation and reverse circulation, are compared, their respective characteristics are analyzed, and the technical parameter control standards for the reverse circulation process are clarified, which can provide a reference for field drilling construction.
Abstract: This paper introduces raise boring drilling, a highly efficient vertical shaft construction technique featuring reverse upward excavation from bottom to top. With advantages including high safety, low disturbance, and high efficiency, it is widely applied in mining, underground engineering, and other fields. The technology is divided into two categories: full-face raise boring and core barrel raise boring. Full-face raise boring, including pull-up and jack-up types, is suitable for large-diameter shafts and shafts of varying depths. Core barrel raise boring enables simultaneous shaft formation and geological coring, and is applicable to small‑to‑medium shallow‑to‑medium‑depth shafts. The technology is evolving toward intelligence, greater depth, and unmanned operation.
Abstract: This paper elaborates on bored pile drilling technology, identifying bored piles as an important type of cast-in-place end-bearing pile. Compared with precast piles, bored piles feature controllable costs, low steel consumption, strong capability for large-diameter and ultra-deep hole forming, wide geological applicability, and low environmental impact, while still facing deficiencies such as sediment cleaning and borehole wall mud cake issues. It also introduces the basic requirements, characteristics, conventional and innovative drilling processes, and points out the broad application prospects of this technology amid technological innovation.
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