扩大自升式钻井平台使用范围的新方法

Method for Extending the Application Scope of Self Elevating Drilling Platform

在固定平台上安装钻机钻生产井,需建造大的固定平台,工程费用高;在自升式钻井平台槽口中插入较小的导管架平台钻井,对海况要求高,就位时风险大,且钻井数量有限;悬臂式钻井平台在井数不太多、水深不太深的固定平台上钻井很成功,但在要求打井数量多,横向布井多时,不得不多次就位,留下诸多脚印,对钻井平台的安全构成威胁。在水深增加和生产井数量增多,用以上方法均受到限制时,作者提出对90m自升槽口式钻井平台稍加技术改造,将钻机滑移到井口平台上钻井的一种扩大自升槽口式钻井平台使用范围的新方法。

A rig drilling well on a fixed platform requires a large platform with great expense; using a smaller jacket platform located in slot of the self elevating platform to drill wells,sea condition for location of the smaller platform is stringent with higher risk and also well number is limited;using a cantilever drilling platform to drill wells is successful on fixed platform with limited number of wells and water depth. But in case of more wells required and more lateral wells arranged,the cantilever platform shall be relocated several times,so that many foot prints formed,the safety of the platform is to be threatened. While application of the above mentioned drilling method is restricted due to increase of water depth and well number. The author of this paper proposes a new scheme to extend the application scope of the self-elevating slot type drilling platform ,which is to slightly reform the platform and making it possible to slide the drilling rig onto the wellhead platform for well drilling.