管柱牙痕产生机理与减少减轻措施研究  

Research on the Generation Mechanism of Power Tong Bite Marks and Corresponding Reduction and Mitigation Measures

作　　者：毕群泗[1,2] Bi Qunsi(Lanpec Technologies Limited;Lanpec Technologies Limited(Shanghai))

机构地区：[1]甘肃蓝科石化高新装备股份有限公司 [2]上海蓝滨石化设备有限责任公司

出　　处：《石油机械》2023年第2期138-143,150,共7页China Petroleum Machinery

基　　金：2021年湖北省高价值知识产权培育工程(专利类)项目“海洋油气钻完井关键工具研制及应用研究”(0101)。

摘　　要：动力钳会在管柱表面产生比较明显的牙痕,而过深的牙痕会危及管柱安全及寿命。针对此问题,通过对牙痕产生过程的分析,提出了划痕和压痕的概念。通过对钳牙与管柱表面的接触力学分析,推导出了不产生划痕的条件和压痕深度的表达式,确立了动力钳结构参数、钳牙结构参数和材料与管柱牙痕的关系,给出了减小减轻牙痕的措施。以Ф88.9 mm油管为例,依据该理论对动力钳结构参数、钳牙参数和材料等进行了设计,钳牙对油管表面的划痕明显改善,压痕明显减轻。研究结果可为优化动力钳结构、钳牙结构和材料提供理论依据。Power tongs may leave notable bite marks on the surface of pipes,and excessively deep bite marks endanger the safety and service life of pipes.In this research,the bite mark generation process was analyzed and the concepts of scratch and indentation were proposed.The investigation of the contact mechanics between tong dies and the pipe surface derived the condition of no scratch and expression of the indentation depth.The correlation of bite marks with the power tong structural parameter,tong die structural parameter,and parameters of involved materials were built,and the measures to reduce and mitigate bite marks were given.With the Ф88.9 mm production tubing as an example,the structural parameter of the power tong,the tong die parameter and the materials were optimized using the presented theory.Consequently,the scratch left by tong dies on the production tubing surface is considerably improved and the indentation is greatly mitigated.The findings of this research provide theoretical references for optimizing the power tong structure,tong die structure and materials.

关 键 词：管柱 动力钳 牙痕 机理 优化设计 减轻措施 

分 类 号：TE973[石油与天然气工程—石油机械设备]