Views: 0 Author: Site Editor Publish Time: 2025-10-13 Origin: Site
In the field of construction engineering, rotary drilling rigs are the 'main force' in pile foundation construction. Used rotary drilling rigs, simply put, are those that have been used once or multiple times and have flowed from the original owner to the market. They are not 'old and scrapped equipment', but rather equipment that still has normal construction capabilities after professional inspection, maintenance, or servicing. Their core value lies in meeting the needs of engineering pile foundation construction at a lower cost.
Its core application revolves around 'pile foundation drilling', primarily serving scenarios that require deep-hole and hard formation construction. Common applications include three categories:
Residential and commercial construction: In the construction of high-rise residential buildings and commercial complexes, it is used to drill pile foundations with diameters of 0.8-2.5 meters and depths of 20-60 meters (such as cast-in-place piles). Second-hand rotary drilling rigs can quickly penetrate clay, sand layers, and even weathered rock formations, laying a solid 'underground foundation' for buildings.
Transportation engineering: It is used for bridge piers, high-speed rail station foundation construction in highways and railways, as well as deep-hole operations for municipal pipelines (such as large rainwater wells). It can adapt to complex environments such as outdoor areas and muddy conditions, with drilling efficiency 3-5 times higher than traditional impact drills.
Special scenarios: For example, reservoir embankment reinforcement and wind power base foundations (which require large-diameter piles with diameters over 2 meters and depths over 50 meters), some second-hand rotary drilling rigs can handle difficult formations such as hard rock and gravel layers by replacing drill bits (such as roller cone bits and barrel bits).
Why Choose Used Rotary Drills? Three Core Advantages Are Very Practical
For small and medium-sized engineering enterprises or short-term projects, the advantages of used equipment are more in line with needs than brand-new equipment:
Lower cost and high cost-effectiveness: The unit price of brand-new rotary drills is mostly between 2 million to 10 million yuan, while used equipment prices are usually 40%-70% of new ones, and there is no need to bear the 'depreciation loss' of new machines—for example, a used rotary drill that has been used for 3 years and is in good working condition can save nearly one million yuan in procurement costs, which is more friendly to enterprises with limited funds;
Fast delivery and no delay in project schedule: Brand-new drills need to be scheduled, produced, and transported from the manufacturer, with a cycle often lasting 2-6 months, while used rotary drills are mostly 'in stock'. As long as they pass inspection, they can arrive for debugging and start work within 1-2 weeks after payment, which is especially suitable for projects with tight schedules that require quick construction投入;
Strong preservation of value and high flexibility: If an enterprise only undertakes short-term projects (such as bridge engineering lasting 6-12 months), after the project ends, the used rotary drill can be resold again, with equipment depreciation loss less than 30% compared to new machines; In addition, the used market has a rich variety of models, which can flexibly select different specifications such as 150-type, 220-type, 360-type according to project needs (such as hole diameter and depth), avoiding waste caused by 'using a large machine for a small job' or 'a small machine being difficult to use'.
Although there are advantages, it is necessary to avoid 'poor-quality equipment'. Prioritize equipment with complete maintenance records and no major accidents (such as body deformation or engine overhauls). It is best to have a professional third-party testing agency inspect key components such as the wear degree of drill rods, the sealing performance of the hydraulic system, and engine power. As long as the right equipment is selected, second-hand rotary drilling rigs can become a 'cost-effective and efficient' helper in engineering construction.
