The Optimized Research Of The Structure Of Plastic Tool For Repairing The Destroyed Casing Well

In the course of discover the Oil field, because of the infection of movement of lithosphere and the affusion tap and other factors, the Destroyed Casing and water Well is the matter ubiquity in oil fied. For renewing the manufacture of oil and water well, we usually adopting the enlarging radius. So the repair of the oil and water well is always the task of the technician in oil field. For the fact of oil field, in order to improve the quality of repair the Destroyed Casing Well and shorten time, the paper research embed for the structure of plastic tools in repairing. The result will be the direction of the Destroyed Casing Well and the amelioration for plastic tools.The present status and developmental direction in our country and the anthers are summed up for the Destroyed Casing Well, which conclude the method of elasticity and plasticity mechanics, contact mechanics, and compute mechanics and anthers. Then connecting with the visualized repairing technical for the destroyed casing well in oil extraction engineering , For optimizing of the structure of tool for repairing the destroyed casing well, the paper analyzed the course of distortion and plastic for the casing. Through mechanics analysis, build four mechanics and lined models of casing well and get the conclusion that the casing well's distortion is related with the asymmetry degree of the to load. When the pressure asymmetry reach to a value around the casing, the casing will be distortion. The rule for the pressure and distortion were found. The thereunder was provided advantaged for explain to the Casing Well Destroyed abundant. The essential prophase preparative was provided for calculating and analyzing the casing plastic. For the fact of impact plastic in oil field, the elasticity and plasticity mechanics^ contact non-lined and lined theory were combined to cell disperse using line finite, the casing model of mechanics and finite, the distortion and plastic process were calculated with the Newton-Raphson and the load increment. The strength and distortion for the casing impact plastic were analyzed by the numbers. The angle of the plastic toll was optimized. The best conclusion for reasonable angle was educed was 30-40? The theoretic thereunder was proved for the optimizing the plastic tolls in oil field. The design reliable thereunder was proved for the optimizing the prepairing technics in oil field.