Core Drill Machine

Product Description:
This machine utilizes a fully hydraulic top-drive rotary system, in which a hydraulic motor directly drives the power head. Both rotational speed and torque are infinitely adjustable. By eliminating mechanical transmission components—such as the spindle, chuck, and hoist gearbox—the design is simplified and the number of potential failure points is reduced. Equipped with a long-stroke hydraulic feed system that offers continuously adjustable feed and lifting forces, the machine allows for low-pressure, slow-rotation drilling in soft strata, and high-pressure, fast-rotation drilling in hard rock; a single unit can thus handle both interbedded soft-hard formations and fractured, high-loss strata. The machine features a dual-winch setup—a main winch and a wireline coring winch—enabling the inner core tube to be retrieved via an overshot without the need to pull the entire drill string, which significantly reduces auxiliary time during deep-hole drilling. Furthermore, the integration of a hydraulically raised/lowered mast, a hydraulic drill-string clamping and make-up/break-out device, and a centralized control console allows a single operator to manage all functions—including mast erection, drill-string clamping, rod breakout, and hoisting—from a fixed station. This also eliminates the need for an external crane when relocating the rig between multiple sites in mountainous terrain.

Product Features:
1. The core value of this rig lies in its ability to "minimize downtime, ensure accurate core recovery, handle demanding drilling conditions, and reduce operational costs." The wireline coring technique eliminates the need to pull the entire drill string to retrieve the core; instead, an overshot is lowered to extract the inner tube. As the borehole depth increases, the time saved on auxiliary operations becomes even more significant, leading to a substantial increase in monthly drilling footage compared to conventional coring methods.
2. The inner tube remains at the bottom of the hole throughout the coring process, ensuring the core is collected without friction against the borehole wall or secondary impacts. This results in a high core recovery rate and clearly defined stratigraphic boundaries, meeting the stringent core quality requirements for detailed geological surveys and reserve verification, while also reducing the need for additional drilling caused by compromised core samples.
3. The fully hydraulic transmission system enables stepless speed regulation and pressure-limiting protection. It prevents rapid advancement in soft soil, stalling in hard rock, or clutch burnout in fractured zones. In the event of a stuck drill, the system can release pressure to protect the drill string, allowing a single rig to navigate through various geological formations within a single borehole.
4. Furthermore, the centralized control console, hydraulic clamping system, and wireline coring process allow a two-person crew to manage operations. Equipped with a self-propelled crawler chassis and a hydraulically raised/lowered mast, the rig eliminates the need for external cranes or the construction of temporary access roads when moving between drill sites—effectively lowering long-term costs related to labor and site relocation.

Product Specifications:

[Important Notice] Products are subject to continuous improvement; changes may occur without prior notice. Please refer to the actual product. 

Application Scenarios：
1. Geological exploration of solid mineral deposits: This includes core drilling for metallic and non-metallic minerals, as well as coalfields, across various stages—general survey, detailed survey, and full-scale exploration. The efficiency of core recovery and a high recovery rate in deep-hole sections are critical to the reliability of reserve reports and the successful acceptance of projects.
2. Geotechnical engineering investigation: This covers foundation investigations for industrial and civil construction, bridges, subways, airports, and ports, as well as geological profiling along highways and railways. The equipment can be fitted with an SPT (Standard Penetration Test) hammer, allowing for both core sampling and in-situ testing to be performed with a single rig.
3. Water conservancy, hydropower, and linear infrastructure projects: Used for assessing the integrity of rock masses at dam foundations and abutments, investigating reservoir areas and spillways, and drilling along the alignments of water-diversion tunnels or other tunnel projects. Continuous core samples facilitate the interpretation of weathering zones and the extent of fracture development.
4. Mine production exploration, as well as deep-hole core sampling for geothermal and hydrogeological purposes: Suitable for assessing slope stability in open-pit mines, conducting underground water detection and structural probing ahead of excavation, verifying resource estimates, and performing core drilling for geothermal exploration or deep hydrogeological investigations. It should be noted that the primary function of this rig is core sampling; tasks such as installing well casings, placing gravel packs, and well development require additional specialized equipment and procedures. Therefore, it should not be marketed based on the specifications typically associated with dedicated water-well drilling rigs.