CAJ | 학술논문

基于随钻测量仪的密封要求,设计O形圈加单侧挡圈的密封结构.建立该密封结构的轴对称模型,采用线性有限元软件ABAQUS对其应力进行分析,分析表明,O形圈与沟槽及钻杆内壁的接触面起主要密封作用.确定挡易受损和失效的关键部位,分析压力及压缩率等典型参数对关键区域的影响,获得O形圈及挡圈工作时的敏感区域应力状态及各种参数.结果表明,此密封结构能够承受30 MPa高压,且在高压下挡圈对O形圈的保护作用更显著.过1000 m井下实验,初步验证了仿真结果的正确性.
기우수찬측량의적밀봉요구,설계O형권가단측당권적밀봉결구.건립해밀봉결구적축대칭모형,채용선성유한원연건ABAQUS대기응력진행분석,분석표명,O형권여구조급찬간내벽적접촉면기주요밀봉작용.학정당역수손화실효적관건부위,분석압력급압축솔등전형삼수대관건구역적영향,획득O형권급당권공작시적민감구역응력상태급각충삼수.결과표명,차밀봉결구능구승수30 MPa고압,차재고압하당권대O형권적보호작용경현저.과1000 m정하실험,초보험증료방진결과적정학성.
Based on sealing requirement of the apparatus for measurement while drilling,the sealing structure of O-ring plus back-up ring was designed. An axisymmetric model of the sealing structure was established,and the stress was ana-lyzed by utilizing the non-linear finite element software ABAQUS. It is shown by analysis the contacts of O-ring with groove and drilling pipe’s in wall play a major role in sealing contact surface. The critical parts which easy to damage and failure in back-up ring were identified,the influences to key area by typical pressure and compression ratio were analyzed,and the stress state and various parameters of the sensitive work area of the O-ring plus back-up ring were obtained. The results show that this sealing structure can withstand 30 MPa pressure,and under high pressure,the back up ring has better pro-tective effect on O-ring. Through the 1 000 m underground sealing experiments,the simulation results was verified.