Research And Design Of 4000m Power Head Core Drill

Due to the continuous exploitation of mineral resources,the shallow mineral resources are nearly exhausted.At present,the development of deep exploration has gradually become the innovative technology and main direction of geological exploration in China.The new drilling method of drilling tools driven by power head rig is developing to high efficiency,high performance and intelligence.The power head core drilling machine has the special advantage of long-distance positioning in the drilling of deviated wells and highly difficult directional wells,which makes the research and development and design of power head core drilling machine by Major Geological Machinery Companies in recent years,replacing the traditional rotary drilling machine is just around the corner.According to the research method and development direction of power head core drilling machine,combined with the use of power head drilling machine at home and abroad,the paper analyzes the rope coring operation technology and existing geological drilling equipment,and determines the specific design scheme.Based on the research and design of the power head core drilling machine for drilling extra deep hole of 4000 meters,according to the target that the core drilling needs to achieve,combined with its working principle and working condition,the structural scheme of the power head core drilling machine is preliminarily designed by using the mechanical design method.Based on the detailed comparison of electric drilling rig and hydraulic drilling rig,combined with the structural advantages of oil top drive,the structure,design parameters and design principles of the optimal power head drilling rig are determined.The structure of each module of the drilling rig is designed,and the assembly of the whole structure is designed at the same time.In the design process,the bearing,expansion sleeve and motor are selected,and the strength is checked by using theoretical knowledge and standards;the motor shape structure is designed,and the power is calculated by using the drilling power calculation knowledge;at the same time,the stress analysis and strength calculation are carried out for the back-up Tong.In the design process,CAD and Solid Works are used to draw the scheme and model,and the workbench is used to analyze the main bearing parts such as the lower box body,sliding shaft,lifting ring and so on.In addition to ensuring its strength,the structure is optimized from the structure and strength,and the feasibility is verified.In addition,in order to achieve a high degree of automation,the hydraulic control system is integrated on the drill body to complete the core top drive operation in the construction process,such as the balance oil cylinder,the back-up tong,the elevator tilt back and forth,etc.The hydraulic system and principle are preliminarily determined.According to the schematic diagram,the pipeline layout and component selection are carried out.Based on each hydraulic circuit and construction application,each oil port of the hydraulic valve body is designed.At the same time,the basic operation of each hydraulic circuit is described.