Single-stage double-plug casing cementing is the most common cementing method for offshore drilling. It uses double-casing rubber plugs (top and bottom plugs) for cementing. The process flow is shown in the figure. Generally, common casing plugs are used for cementing on jack-up platforms or jackets, while SSR plugs are used for cementing on floating platforms. When using single-stage double rubber plug cementing, the casing string accessories are mainly composed of floating shoes, floating hoop, centralizer and rubber plug.

Liner cementing is a cementing method in which the liner is sent to the suspension design depth with a drill pipe, and the liner is suspended on the outer casing by the liner hanger, and then the cementing operation is started. Tailpipe hangers can be divided into two types: mechanical and hydraulic, we usually use hydraulic tailpipe hangers
To deal with lost circulation, abandoned wells, backfilling depleted horizons, sidetracking and isolating formations, cement plugging technology is required, and balanced plugging is the most commonly used method. When pouring the cement plug, firstly lower the drilling tool to the top of the design depth of the cementing plug, pour cement and replace the cement slurry (to ensure that the cement surface in the pipe is higher than the height of the annular cement plug surface), and then slowly pull out the drilling tool and leave the cement The top surface of the plug is flushed cleanly in a cycle, leaving the cement plug in its original position.