为解决现有海上平台存在的预留井槽不足的问题，研究和开发了加挂井槽技术。面对海上平台的现实难题，通过对平台空间条件、钻井方式、平台结构及平台系统能力等的分析和研究，提出和确定加挂井槽的可行性，细化和完善加挂井槽的相关设计并将设计方案应用于工程实践。实践证明：加挂井槽解决了现有海上平台预留井槽不足的问题，具有结构简易、工程周期短、投资成本低等特点，能满足增打调整井的要求，经济社会效益显著。

To solve the problem of lacking of spare well slots on offshore platform, the adding well slots technology is researched and developed. By analyzing and demonstrating the space condition, the drilling type, structure strength and system capabilities of the old platform, the applicability of the adding well slots was confirmed. The design of the adding well slots was refined and improved, and then it was carried out in the engineering practice.It was demonstrated that the adding well slots can meet the needs of drilling adjust well of old platform with the specialty of simple structure, short project period,low-cost and great economic benefits.