A kind of end joint tightening device covering the sucker rod, the rod body has the joint thread, the locking thread, the joint thread and the locking thread are stress relief grooves, the joint thread and the stress relief groove form the outer shoulder, the rod body is covered with anticorrosion layer, the end joint is connected to the locking thread, the back clamp card has internal thread. Inside thread, inside thread of the back clamp card, inside thread, inside thread, inside thread, inside thread of the back clamp body, inside thread, inside thread, inside thread of the back clamp body, inside thread, inside The thread is matched with the thread of the joint. The back clamp card has a contraction section in the body. The back clamp body milling is cut into two halves on the joint thread. The inner thread is connected with the joint thread. The contraction section is restricted by the outer shoulder, so the back clamp body can not be withdrawn on the joint thread. The back clamp card is milling into two half buckles and fixed on the thread of the joint thread. As a whole, the thread of the locking thread is tightened with the connecting thread of the end joint. After the end joint is fastened to the locking thread, the inner thread on the two halves of the back clamp card can be removed from the thread of the joint, and it can be removed from the rod body without the tool rotated back clamp body, and the assembly quality of the coated rod can be guaranteed. Quantity.
【技术实现步骤摘要】
一种包覆抽油杆的止端接头拧紧装置
本专利技术属于油田抽油井内抽油泵与抽油机连接用的抽油杆的装配设备,是组装包覆抽油杆的工具,具体是一种包覆抽油杆的止端接头拧紧装置。
技术介绍
在油田抽油系统中,抽油杆浸泡在井液中工作,井液中含有腐蚀性介质,对抽油杆产生腐蚀,造成抽油杆柱的使用寿命短,油井生产周期短,经济效益差。为了解决这一问题,油田使用过材料型防腐蚀性抽油杆,但这种抽油杆是金属材料,抗腐蚀能力有限,不能完全解决被腐蚀的问题。为此,技术人员设计了包覆抽油杆,这种抽油杆的杆体上包覆了高密度聚乙稀制成的防腐层,杆体表面不与井液接触,井液不会腐蚀抽油杆,这种抽油杆如图1所示,由抽油杆接箍7、止端接头2、杆体3、防腐层4组成,抽油杆接箍7的下端面与止端接头6的上端面接触,使抽油杆接箍7与杆体3的连接螺纹被锁紧,使其连接牢固,不会脱扣。要实现抽油杆接箍7与杆体3的头部连接螺纹被锁紧,必须保证止端接头6与杆体3的连接螺纹能拧紧。由于杆体3上的防腐层4不能打管钳,露在防腐层4之外的杆体3的头部也没有打管钳的部位,因此,止端接头6与杆体3的连接螺纹无法拧紧,造成组装包覆抽油杆困难, ...
【技术保护点】
1.一种包覆抽油杆的止端接头拧紧装置,包括止端接头(2)、杆体(3)、防腐层(4),杆体(3)上有接头螺纹(3‑1)、锁紧螺纹(3‑4),所述的接头螺纹(3‑1)、锁紧螺纹(3‑4)螺纹旋向相同,所述的接头螺纹(3‑1)与锁紧螺纹(3‑4)之间为应力消除槽(3‑3),所述的应力消除槽(3‑3)的直径小于所述的接头螺纹(3‑1)与锁紧螺纹(3‑4)的底径,使其所述的接头螺纹(3‑1)与所述的应力消除槽(3‑3)之间形成外台肩(3‑2),杆体(3)上裹覆防腐层(4),在所述的锁紧螺纹(3‑4)上连接止端接头(2),其特征是:还包括背钳卡体(1),背钳卡体(1)有内螺纹(1‑2) ...
【技术特征摘要】
1.一种包覆抽油杆的止端接头拧紧装置,包括止端接头(2)、杆体(3)、防腐层(4),杆体(3)上有接头螺纹(3-1)、锁紧螺纹(3-4),所述的接头螺纹(3-1)、锁紧螺纹(3-4)螺纹旋向相同,所述的接头螺纹(3-1)与锁紧螺纹(3-4)之间为应力消除槽(3-3),所述的应力消除槽(3-3)的直径小于所述的接头螺纹(3-1)与锁紧螺纹(3-4)的底径,使其所述的接头螺纹(3-1)与所述的应力消除槽(3-3)之间形成外台肩(3-2),杆体(3)上裹覆防腐层(4),在所述的锁紧螺纹(3-4)上连接止端接头(2),其特征是:还包括背钳卡体(1),背钳卡...
【专利技术属性】
技术研发人员:张永法,位志斌,田庆国,宋东,石峰,丁明梅,霍虹,
申请(专利权)人:山东博诺利石油装备有限公司,
类型:发明
国别省市:山东,37
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