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部分采用永久井架进行冻结凿井工程的冻结管布置圈径已经扩大到永久井架基础的范围之内,前期的冻胀及后期的融沉会对永久井架基础造成极其不利影响,造成永久井架基础的抬升、下沉、偏斜等。对采用局部保温技术的冻结工程进行了数值计算分析,获得了采用局部保温措施后地层温度场的发展规律,可为类似工程的设计、施工提供参考。
Some of the installation of freezing pipe with a permanent derrick has been extended to within the framework of a permanent derrick. Frost heaving and subsequent thaw settlement will have an extremely adverse effect on the permanent derrick foundation, resulting in a permanent derrick-based Lift, sink, skew and so on. The numerical simulation analysis of freezing engineering using local thermal insulation technology has obtained the development law of formation temperature field after local thermal insulation measures and can provide references for the design and construction of similar projects.