CAJ | 학술논문

建立了深水井测试及生产过程中井口处产生的热膨胀力与井口抬升量力学模型，结合具体井身结构计算了井口热膨胀力与抬升量，并分析了各层套管水泥浆返高与温度变化对井口热膨胀力与抬升量的影响。结果表明：井口处产生的热膨胀力远大于剪切销钉的承载力，很容易造成剪切销钉剪断，从而导致井口抬升；表层套管水泥浆返高对井口抬升量的影响最大，生产套管影响最小，各层套管的水泥浆返高对井口总膨胀力均无影响；随着各层套管温度的升高，井口总热膨胀力及井口抬升量均线性增大。可为水下井口设计和测试及生产过程中的参数设计提供理论依据。
건립료심수정측시급생산과정중정구처산생적열팽창력여정구태승량역학모형，결합구체정신결구계산료정구열팽창력여태승량，병분석료각층투관수니장반고여온도변화대정구열팽창력여태승량적영향。결과표명：정구처산생적열팽창력원대우전절소정적승재력，흔용역조성전절소정전단，종이도치정구태승；표층투관수니장반고대정구태승량적영향최대，생산투관영향최소，각층투관적수니장반고대정구총팽창력균무영향；수착각층투관온도적승고，정구총열팽창력급정구태승량균선성증대。가위수하정구설계화측시급생산과정중적삼수설계제공이론의거。
In order to calculate the thermal expansion force and wellhead growth of deepwater drilling during well testing and production,the mechanical model and analysis method of multilay-er casing suspension on wellhead have been established.The thermal expansion force and wellhead growth have been figured out through a specific well structure and the influence of top of cement (TOC)and temperature variation on wellhead growth have also been analyzed.Results show that,during well testing and production,the thermal expansion force on wellhead is far bigger than the bearing capacity of the sheared locking pin and the sheared locking pin is easily to be cut that would result in wellhead growth.The TOC of surface casing has greatest impact on wellhead growth and the production casing has the smallest impact.The TOC of all casing has no influence on the thermal expansion force.With the increase of temperature of all casing,the thermal expansion force and wellhead growth increase linearly.The research has some theoretical foundation for the design of subsea wellhead and parameter design of deepwater drilling during well testing and production.