The utility model relates to the cementing technology of drilling, completion and cementing in the petroleum industry. In order to overcome the problem of reducing the diameter of the half cementing technique without drilling in the inner pipe, the utility model provides a half cementing pipe string. The completion string includes: packer, stage collar and casing are connected in sequence, plug and plug in the packer and classification hoop, the inner wall of the packer in the tube is provided with a positioning groove, plug positioning device on the inner wall of the block embedded in them; classification hoop is arranged on the closed groove, plug the closed block embedded in them. The utility model can be used for the half pipe cementing operation without an inner pipe, and the diameter of the completion tool is the same as that of the inner diameter of the sleeve.
【技术实现步骤摘要】
【技术保护点】
1.一种半程注水泥完井管柱,包括自下而上顺序连接的管外封隔器(1)、分级箍(3)和套管(5),堵塞器(2)置于管外封隔器(1)和分级箍(3)内,胶塞(4)位于堵塞器(2)之上,其特征在于:堵塞器(2)包括定位机构、密封机构和关闭机构,定位机构和关闭机构上下相连,密封机构套在定位机构外侧;所述定位机构的外侧四周安装有定位块(6),在管外封隔器(1)的内壁上设有定位凹槽,所述定位块(6)嵌入其中;所述关闭机构的外侧四周安装关闭块(7),在分级箍(3)的内壁上设有关闭凹槽,所述关闭块(7)嵌入其中;所述密封机构包括胶筒(19),胶筒(19)位于管外封隔器(1)的进液孔(8)下方。
【技术特征摘要】
【专利技术属性】
技术研发人员:田启忠,董社霞,彭汉修,张瑞霞,刘建新,朱永生,李传文,
申请(专利权)人:中国石油化工股份有限公司,中国石油化工股份有限公司胜利油田分公司采油工艺研究院,
类型:实用新型
国别省市:11
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