双级注水泥器附件

型号

i

双级注水泥器附件stage cementer accessories 双级注水泥器附件 stage cementer plug system msc-a型和hsc-a型双级注水泥器附件包括：挠性塞、重力型打开塞(简称重力塞)、关闭塞、碰压座、顶替型打开塞(简称顶替塞)。这些零件由胶塞及铝合金材料制成，均具有良好的可钻性。 关闭塞 closing plug the accessories of msc/hsc stage cementer include a first-stage plug, free-fall opening plug, closing plug, shut-off baffle and pumping-down opening plug. being made of rubber or aluminum, these parts are drillable. 1、碰压座用于挠性塞碰压，一般放置于浮箍以上的一根套管接箍中。 2、挠性塞用于隔离水泥浆和钻井液，第一级替量到位后，形成碰压。 3、重力塞为流线形，内部装有铅，投塞后快速自由下落至下滑套上并形成密封。憋压后打开循环孔。重力型打开塞 free-fall opening plug 4、关闭塞用于隔离第二级水泥浆钻井液，当其运行至上滑套位置时形成密封。继续加压，关闭套下行，循环孔关闭。 5、顶替型打开塞用于连续式双级注水泥作业，也适用与在斜井中使用。它可直接打开循环孔，而不像重力塞那样需要较长等待下落时间。 1. the shut-off baffle is installed in the casing collar, one joint above the float collar. 1. 挠性塞 first-stage plug the first-stage plug is used to isolate the first-stage cement and drilling fluid. on the end of displacement，the first-stage plug lands and effects a seal against the shut-off baffle. 3. featuring streamline shape and filled with lead, the free-fall opening plug can free-fall to the lower sliding sleeve. when pressure is applied to the casing, it can open the circulation ports. 碰压座 shut-off baffle 4. the closing plug is used to isolate the second-stage cement and drilling fluid. when running to the upper sliding sleeve, it effect a seal in the stage cementer. pressure is applied to the casing and the circulation ports are closed. 顶替型打开塞 pumping-down opening plug 5. the pump-down opening plug is used for continuous cementing operation and in deviated wells. it can open the circulation ports directly and , whereas the free-fall opening plug needs longer time waiting for falling.