CAJ | 학술논문

随钻测量系统（ MWD）多在高温、高压、强振动的工况条件下使用，而传统的O型圈密封结构在这种情况下容易发生泄漏。针对3000 m井底使用的小口径随钻测量系统密封结构的要求，提出一种基于O型圈的锥面密封结构，该密封结构采用端面密封作为初级密封，采用多道O型圈锥面密封密封（加挡圈）作为二级密封，采用粗牙螺纹并缠绕生胶带作为三级密封。设计的密封结构在钻探现场进行多次反复试验，结果显示该密封结构可在孔底连续工作20 h而不发生泄漏，满足实际项目中的使用要求。
수찬측량계통（ MWD）다재고온、고압、강진동적공황조건하사용，이전통적O형권밀봉결구재저충정황하용역발생설루。침대3000 m정저사용적소구경수찬측량계통밀봉결구적요구，제출일충기우O형권적추면밀봉결구，해밀봉결구채용단면밀봉작위초급밀봉，채용다도O형권추면밀봉밀봉（가당권）작위이급밀봉，채용조아라문병전요생효대작위삼급밀봉。설계적밀봉결구재찬탐현장진행다차반복시험，결과현시해밀봉결구가재공저련속공작20 h이불발생설루，만족실제항목중적사용요구。
The system of measurement while drilling( MWD is usually used in the condition of high temperature,high pressure and strong vibration,while the traditional sealing structure of O?rings may cause leakage easily in those working condition.According to the sealing demand of the sealing structure of small MWD used at the well bottom of 3 000 m,a new conical sealing structure based on the O?rings was designed.The sealing structure adopts the end face seal as the first seal, the O?rings and the conical sealing as the second seal and the thread sealed as the third seal.The designed sealing structure was tested many times at drilling field.The result indicates that the sealing structure can work safety more than 20 hours and it can meet the requires of real project.