Participated in the R&D and application of localized TBM cutters for Qinling Tunnel with China Railway No.18 Engineering Bureau and China Railway Tunnel Bureau in 1997 (Qinling Area, Shaanxi Province)

2025-10-15

Jet Reverse Circulation Well Flushing

Abstract：Combined with the domestic and foreign equipment parameters and the localization application status of drilling engineering in 2026, this paper systematically elaborates the working mechanism, complete set of equipment, technical indicators, applicable working conditions and process optimization development direction of the jet reverse circulation well flushing technology, providing theoretical and practical basis for the scheme selection of well flushing in shallow large-diameter drilling engineering.

2026-07-21

Pump Suction Reverse Circulation Well Flushing Method

Abstract: This paper introduces the pump suction reverse circulation well flushing technology, which realizes well bore desilting through negative pressure suction. It involves special equipment and two starting methods, among which vacuum negative pressure starting is the preferred one. This technology is energy-saving and efficient, suitable for medium-shallow water wells with a depth of 60–80 meters. The construction key points, restricted scenarios and acceptance standards such as sand content of water quality are specified.

2026-07-10

Air-Lift Reverse Circulation Well Flushing Method

Abstract: This paper elaborates the principle, complete supporting equipment and core parameters of air-lift reverse circulation well flushing technology, as well as field fault disposal methods, compares the advantages and disadvantages of two types of mixers, and provides standardized construction control indexes.

2026-06-25

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.

2026-06-12

Raise Boring Drilling

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.

2026-05-28

Bored Pile Drilling

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.

2026-05-20

Diaphragm Wall Drilling

Abstract: This paper briefly describes the development history of diaphragm wall drilling technology and its applications in municipal, water conservancy, transportation and other fields. It details two major drilling methods, namely the panel method and the shaft array method, as well as two drilling sequences, namely horizontal drilling and vertical drilling. It also mentions the advantages of relevant technological breakthroughs, presenting its core content and application value.

2026-05-08

Deep Well Sewage Treatment Well (Deep Well Aeration Process)

Abstract: This paper briefly describes the advantages and domestic & foreign development history of the deep well aeration process, and defines the deep well as the core structure of the system. It focuses on the deep well structure and drilling quality requirements, highlights the key precautions during drilling construction, and specifies the core specifications for structural design and drilling construction.

2026-04-28

Design of Large-Diameter Drilling

Abstract：This paper focuses on the design of large-diameter drilling, elaborating on the design principles and demonstration cases of drilling structure and sequence, as well as key contents including well site layout, wellhead protection, foundation treatment and equipment installation.

2026-04-15