CAJ | 학술논문

针对杆柱发生磨损后的寿命预测问题,基于井下抽油杆与油管随时间磨损的特点,应用ΠΡΟΗΝΚΟΒ提出的磨损计算公式,推算出杆柱在大狗腿度处以及杆柱组合下部受压部分的磨损厚度和磨损面积与时间的关系,并根据抽油杆横截面积减小造成抽油杆磨损处的应力增加的原理,建立了一套可以预测杆柱寿命的模型.该模型可以在已知井眼轨迹和杆柱结构的前提下预测抽油杆柱的断脱位置和断脱时间.通过实例计算验证了该模型的准确性,并通过该模型分析了旋转井口有助于延长抽油杆柱磨损寿命的原理.
침대간주발생마손후적수명예측문제,기우정하추유간여유관수시간마손적특점,응용ΠΡΟΗΝΚΟΒ제출적마손계산공식,추산출간주재대구퇴도처이급간주조합하부수압부분적마손후도화마손면적여시간적관계,병근거추유간횡절면적감소조성추유간마손처적응력증가적원리,건립료일투가이예측간주수명적모형.해모형가이재이지정안궤적화간주결구적전제하예측추유간주적단탈위치화단탈시간.통과실례계산험증료해모형적준학성,병통과해모형분석료선전정구유조우연장추유간주마손수명적원리.
?A?model?was?established?to?analyze?and?predict?effectively?the?wear?life?of?rod.?It?is?considered?in?this?model:?the?two?main?reasons?for?partial-wear:?borehole?curving?and?rod?blending?under?pressure?in?the?down?stroke.?A?calculating?formula?suggested?by?ΠΡΟΗΝΚΟΒ?was?used?to?evaluate?the?increase?of?abrasion?thickness?of?rod?with?time,?and?the?failure?position?and?time?were?estimated?in?accordance?with?the?increase?of?stress?with?the?decrease?of?residual?cross-section?area?at?the?point?where?the?wear?was?worst.?The?comparison?between?the?model?result?and?the?spot?data?was?used?to?prove?the?reliability?of?this?model.?The?principle?that?the?revolving?wellhead?could?retard?the?progress?of?wear?was?interpreted?through?the?calculating?result?made?by?this?model.