CAJ | 학술논문

导电环是智能钻杆导电性能及可靠性的关键.介绍了加工的智能钻杆导电环结构,结构中的内导电环和外导电环分别位于钻杆母接头和公接头的螺纹内径端部,它们之间的柱面接触实现了钻杆接头处的电力及信号导通.对室内钻杆上卸扣试验中导电环的变形过程进行了受力分析,得出轴向力F是导致导电环变形的主要原因.采用有限元分析方法分别对内外导电环的接触过程和单个导电环受轴向力F时的变形状态进行了数值模拟.模拟结果分析表明,将内外导电环过盈配合时的过盈量控制在0.024 mm以下,结合面锥度控制在1:5以上时,导电环在钻杆上卸扣过程中不会产生塑性变形,具有较高的可靠性.
도전배시지능찬간도전성능급가고성적관건.개소료가공적지능찬간도전배결구,결구중적내도전배화외도전배분별위우찬간모접두화공접두적라문내경단부,타문지간적주면접촉실현료찬간접두처적전력급신호도통.대실내찬간상사구시험중도전배적변형과정진행료수력분석,득출축향력F시도치도전배변형적주요원인.채용유한원분석방법분별대내외도전배적접촉과정화단개도전배수축향력F시적변형상태진행료수치모의.모의결과분석표명,장내외도전배과영배합시적과영량공제재0.024 mm이하,결합면추도공제재1:5이상시,도전배재찬간상사구과정중불회산생소성변형,구유교고적가고성.
Conducting ring is the key part of the intelligent drill pipe conductivity and reliability. The paper introduces the conducting ring structure of the processed intelligent drill pipe. An inner conducting ring and an outer conducting ring in this structure were located at the end of the internal diameter of threads of the pin and box connectors of the drill pipe. The contact of the cylindrical surfaces of the two rings realizes the power and signal communication at the drilling joints. We analyze the stress of conducting ring deformation process in an indoor experiment of break-out and make-up connections,and proved that a axial force F is the main reason of conducting ring deformation,and with the finite element analysis software,we make a numerical simulation of the contact process between inner and outer ring and the conductive ring status under the axial force F respectively. Simulation results indicate that the conducting rings will not be plastic deformation and have high reliability if the magnitude of interference is less than 0.024 mm and the taper of joint surface is greater than 1:5.