The Research Of Portable And Quick Vibration Impact Sampling Equipment And Drilling Technology

For resolving the actual problems of chemical exploration sampling and environmental sampling in the transportation inconvenience and water shortage region, the national lab on scientific drilling (NLSD) of China University of Geosciences (Peking) establishes the research open topic of shallow and light sampling tools. This thesis relies on this open topic. The margin is very big in research on easy and convenient rigs and drilling tools in domestic and outside, such as the MK series of rigs in the Mitcham Company and the sampling tools of EiJkelkamp Company in Holland are on the top in the world. The develop of portable and quick vibration impact sampling tools can make the local sampling tools more specialized , fill up the research blank in shallow bore portable sampling tools of chemical exploration sampling and environmental sampling in domestic and resolve the production problems under the special condition of chemical exploration sampling and environmental sampling.The wave theory is the valid method to research the impact machine system with pole parts. Basis on the analysis of the wave theory, the thesis builds up the mechanics model of a vibration and impact sampling system. Through the analysis of one-dimension flexible pole wave equation and numerical solution, this paper studies the produce and spread of stress wave when the vibration generator and drill pipe impact, and the stress wave's influence on the process of vibration impact sampling. It's thought that the thin and long vibration generator can produce ideal stress wave shape. So the vibration generator's shape is designed. The vibration generator, drill pipe, sampler and soil medium are synthesized impact sampling system. It's carried on wave dynamics analysis. Under the flexibility medium and plasticity medium condition, it analyzes the superior stress wave shape of vibration impact sampling system. For viscous plastic medium model, the rectangle wave is the ideal stress wave.On the foundation of above wave theory analysis, according to the demands of chemical sampling and environmental sampling and the research actuality of shallow and light sampling tools in our country, the portable and quick sampling tools are designed. It mainly includes drill pipe with flip clip fixed position key and the inner liner half close tube sampler. Flip clip fixed position key can carry out the top impact and the down-hole impact, which enlarges the ability of deep sampling; The inner liner half close tube sampler resolves the problem of the difficulty of extraction sample and lightens the disturb of the sample; Thesingle mast rack and the hydraulic cylinder pulley resolve the pull ability shortage problem of small rig; The manual hammer etc. is simultaneity designed, which make the whole set tools light weight, simple structure, convenient assemble to dismantle to unload, easy frequent removal in open country.The main advantages of vibration impact sampling tools are quick speed, which especially suits the large quantity sampling and the dispersion bore; It has deeper penetration per time, and can obtain continuous and integrate core; (but other drills usually need many round trips to complete); It can obtain bigger diameter core, satisfying the demand of the experiment on the sample; It has low consume, simple and flexible operation; It has wide application.The sampling experiment and the operating use show that vibration impact sample tools can satisfy the demand of chemical sampling and environmental sampling in shallow and lax strata. Drill technology norm of impact sample is compiled in the meantime, which has a very strong instructive function in the application of sampling tools.