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��This work gives the concept about oil-cut,gas-cut, kick,grave kick,blowout and failure in controlling blowout and summarizes the type of failure in controlling blowout,the objective and man-made reasons causing blowout and the measures to prevent and control well blowout.     

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��The "ZYGM" is the abbreviation of phonetic annotation of chinese characters Its meaning is "long-barrel, oil-lubrication, rigid packed hole stabilization" coring tool This work mainly describes the design structural characteristics of the tool, its function and the results used in field.