CAJ | 학술논문

由于狗腿度的存在，钻井过程中钻杆与套管间不可避免存在磨损，而硬度是影响套管耐磨性能的主要因素之一。为探讨硬度对套管耐磨性能的影响，在聚磺体系水基泥浆中，模拟实际钻压、转速等钻进参数，以油田常用N80、P110、VM140和TP140等不同硬度套管为对象，进行钻杆-套管磨损实验，实测磨损效率和摩擦因数，提出用磨损评价综合影响因子评估套管的耐磨性能。实验结果表明：硬度越大，磨损评价综合影响因子越小，套管耐磨性能越好；TP140套管的耐磨性能最好，VM140次之，N80最差，N80套管磨损评价综合影响因子是TP140套管磨损效率的208％。磨损评价综合影响因子兼顾了磨损效率和摩擦因数，比仅用摩损效率来评估耐磨性能的传统做法更为合理。
유우구퇴도적존재，찬정과정중찬간여투관간불가피면존재마손，이경도시영향투관내마성능적주요인소지일。위탐토경도대투관내마성능적영향，재취광체계수기니장중，모의실제찬압、전속등찬진삼수，이유전상용N80、P110、VM140화TP140등불동경도투관위대상，진행찬간-투관마손실험，실측마손효솔화마찰인수，제출용마손평개종합영향인자평고투관적내마성능。실험결과표명：경도월대，마손평개종합영향인자월소，투관내마성능월호；TP140투관적내마성능최호，VM140차지，N80최차，N80투관마손평개종합영향인자시TP140투관마손효솔적208％。마손평개종합영향인자겸고료마손효솔화마찰인수，비부용마손효솔래평고내마성능적전통주법경위합리。
There will be inevitable wear between the drill pipe and casing because of the dog-leg,while hardness of cas-ing is one of the principal factors influencing the wear resistance. Wear experiments of N80,P110,VM140,and TP140 grades casing were done in 1.4 g/cm3 polysulfide water-based drilling fluid to measure the wear parameters such as wear ef-ficiency,friction coefficient,and casing wear influence factor(CWIF)was proposed based on the measured wear parame-ters. It is found that the higher the hardness,the smaller the CWIF,and the better wear resistance performance of casing. N80 grades casing has the worst wear resistance,TP140 grades casing has the best wear resistance,and the second is P110 . The CWIF of N80 is 208 percent of TP140 . The proposed CWIF is the product of wear efficiency and friction coeffi-cient,which is more reasonable to be used in evaluating the wear resistance compared to wear efficiency.