Cover plate for marine riser

The utility model provides a cover plate for a riser, which belongs to the field of cover plates for oil and gas drilling and comprises a handle, a cap, a sealing ring and a lifting pin, the handle is mounted at the top end of the cap, the sealing ring is mounted at the top end of the inner wall of the cap, and the lifting pin is detachably connected to the outer side wall of the cap. The surface drilling anti-falling device is simple in structure and convenient to machine, can prevent falling objects, can solve the technical problem of channeling in the surface drilling process, reduces underground complex conditions for surface drilling, and achieves reduction of drilling cost. 本实用新型提供了一种隔水管用盖板，属于石油天然气钻探用的盖板领域，包括提手、盖帽、密封圈和顶销，所述盖帽的顶端安装有所述提手，所述盖帽的内壁顶端安装有所述密封圈，所述盖帽的外侧壁上可拆卸连接有所述顶销。本实用新型结构简单，加工方便，不仅能防落物，而且能解决表层钻进过程中"窜槽"的技术难题，为表层钻进降低井下复杂情况发生，实现钻井成本降低。