Anti rotation self-locking rubber plug with a cementing, manufacturing technology field belongs to a downhole tool in oil and gas field cementing operation, including the rubber plug and the rubber plug and the floating collar, the rubber plug and the rubber plug is provided with a plastic disc, at the bottom of the rubber plug is arranged on the lower end of the lock core. Under the rubber plug are respectively arranged on the lock core, the float collar is arranged in the float collar lock core, the invention adopts the automatic meshing self-locking, designed a cementing anti rotation self-locking rubber plug, solves drill isolation rubber plug, plug along with a drill bit rotation effect on the crushing efficiency the stopper of the problem, has the characteristics of the upper and lower rubber plug interlocking.
【技术实现步骤摘要】
【技术保护点】
一种固井用防转自锁胶塞,包括上胶塞、下胶塞和浮箍,其特征在于:在上胶塞和下胶塞上都设置有胶盘,在上胶塞的下端、下胶塞的上下端都设置有自锁芯,在浮箍中设置有浮箍自锁芯;上胶塞下端和下胶塞下端分别设置四个带有正钩齿的自锁芯,下胶塞上端的自锁芯和浮箍中设置的浮箍自锁芯带有四个反钩齿。
【技术特征摘要】
【专利技术属性】
技术研发人员:先勇,张毅超,杨万忠,周正,邹祥富,
申请(专利权)人:中国石油集团川庆钻探工程有限公司井下作业公司,
类型:发明
国别省市:90
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