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对辽东湾浅海单井井口保护装置采用隔水套管直接抗冰的可行性进行了研究。采用多种三维混合单元建立了一典 型井口装置的有限元计算模型，该模型利用有限差分的原理真实地反映了地层对结构的约束。计算结果表明，在辽东湾浅 海的６０ｃｍ单层平整冰作用下，结构的位移和应力都在许可范围之内，最大位移为结构的顶部，最大应力发生在隔水套管 与表层套管的上部连接环板上，而隔水套管内加固的水泥层对增加结构的强度、抵抗外载荷的作用起了不可忽视的作用。 计算结果和现场两年多的应用表明，用增厚的隔水套管直接抗冰是可行的。
The feasibility of direct anti-icing of water-proof bushing was studied on single-wellhead wellhead protection device of shallow sea in Liaodong Bay. The finite element model of a typical wellhead device is established by using a variety of three-dimensional mixing elements. The model truly reflects the constraints of the formation by using the principle of finite difference. The calculated results show that the displacements and stresses of the structure are all within the allowable range under the action of 60cm single-layer flat ice in the shallow sea of Liaodong Bay with the maximum displacement at the top of the structure. The maximum stress occurs at the upper part of the riser and the surface casing Connected to the ring plate, and reinforced cement pipe riser to increase the strength of the structure, the role of resistance to external loads played a role can not be ignored. The calculation results and application of more than two years in the field show that it is feasible to use the thickened riser to directly resist ice.