Guide for Selecting Small and Medium-sized Rotary Drilling Rigs: How to Precisely Match 150, 220, and 280 Models

    Medium and small-sized rotary drilling rigs are the main equipment for construction projects such as housing, municipal works, and small-scale infrastructure. The 150, 220, and 280 models differ significantly in terms of construction depth, hole diameter, adaptability to geological formations, and site transfer efficiency. Rational selection directly affects construction efficiency and payback period.

    The 150 model belongs to the lightweight entry-level category, focusing on compactness, agility, and convenient transportation. It has a low overall weight and transportation cost, allowing for quick deployment without the need for large tow trucks. It is suitable for projects such as shallow pile foundations, rural infrastructure construction, small-scale building construction, and electric pole foundations. Its construction depth and hole diameter are mainly medium and small specifications, and it performs stably in conventional soil layers such as clay, sandy soil, and backfill soil. Its advantages lie in low purchase cost, low fuel consumption, and simple maintenance, making it ideal for users who are just starting out and primarily engaged in scattered small-scale engineering projects. It is a high-cost-performance choice for lightweight construction.

    The 220 model is a well-balanced mainstay in the market, boasting the most comprehensive performance and the widest range of applications, while striking a good balance between construction capability and flexibility. It can meet the needs of most municipal pipe networks, residential buildings, and pile foundations for small and medium-sized bridges. It is capable of handling medium-hardness strata and achieves a good balance between efficiency and stability under common geological conditions. The difficulty of relocation is moderate, with a mature system for accessories and services. It has strong second-hand circulation and a high retention rate. Suitable for both long-term fixed projects and diverse engineering undertakings, it is the preferred model for most construction teams.

    The 280 model leans towards medium and large-scale construction capabilities, and it is a high-end version among small and medium-sized models. It has higher torque, greater hole depth and diameter, can handle formations with higher hardness, and is suitable for projects such as large factories, high-rise residential buildings, medium-sized bridges, and water conservancy foundations. It has outstanding advantages in complex formations, stronger continuous operation capabilities, and its single pile efficiency and construction range are significantly better than small models. Although transportation and costs are slightly higher, it can undertake projects with higher unit prices, making it suitable for teams with stable medium and large-scale projects and pursuing multi-purpose use of one machine.

    Overall, for small and scattered projects that focus on low costs, choose 150; for mainstream municipal housing construction that pursues a balanced and practical option, choose 220; for projects with a relatively large scale, complex stratum, and a pursuit of higher bearing capacity, choose 280. By considering the project type, geological conditions, budget, and transfer needs, you can select the most suitable model.