Core drilling rig is a kind of core drilling equipment, which is mainly used for the general survey and exploration of metal and non-metallic solid minerals. Since the core drilling rigs require to take out relatively complete, unmixed and non-torque formation rock samples, the core drilling rigs are all rotary drilling rigs. According to the structure of drilling rig gyrator, core drilling rigs can be divided into three categories: vertical shaft type, turntable type and mobile gyrator type.
The core drilling rig is composed of basic parts such as a rotary mechanism, a feeding mechanism, a lifting mechanism, a transmission mechanism, a control device and a machine base. Depending on the rig type, some core drilling rigs may also be equipped with control gauges or other attachments.
The rotary mechanism of the drilling rig is called the gyrator, which is used to drive the drilling tool to rotate, so that the drill bit can continuously break the rock. There are three types of gyrators of core drilling rigs: vertical shaft type, turntable type and mobile type. The classification of core drilling rigs is derived from this.
Lifting mechanisms are used to lift down drilling tools, casing or other things. Most drilling rigs are specially equipped with a lifting mechanism, which is generally called "lifter", while some drilling rigs are not equipped with a lifting mechanism. For example, in a mobile gyratory drilling rig, the power head and the feeding mechanism are used to cooperate to realize the function of the elevator.
The feeding mechanism is used to adjust and maintain the axial load on the drill bit at the bottom of the hole, and feed the drilling tool according to the drilling speed of the drill bit to keep the drill bit continuously drilling.
The transmission mechanism is used to transmit the power from the power machine of the drilling rig to the working mechanisms of the drilling rig. The transmission mode of drilling rig power is organic transmission, semi-hydraulic transmission and full hydraulic transmission.
The control device is used to distribute power, adjust the movement speed of each working mechanism of the drilling rig, and change the movement direction and form of the working mechanism. The operating mechanism of the mechanical transmission drilling rig is generally set together with the related components, while the operating mechanism of the hydraulic driving drilling rig is mostly set together to form an independent component, which is called the console.
Core drilling rigs are mainly used for the census and exploration of metal and non-metallic solid minerals. In addition, they can also be used for engineering geological exploration, hydrogeological survey, general survey and exploration of oil and gas fields, and water well drilling.
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