CAJ | 학술논문

部分油气井因井漏失返而无法建立全井循环，传统解堵工艺难以解决此类油气井的堵塞，为此开展了旋转射流联合沉砂筒解堵工艺研究。旋转射流联合沉砂筒解堵工艺是利用油管将高压水输送至旋转喷头形成旋转射流，破碎井底堵塞物，堵塞物被上返液运送至一定高度，在环空液柱升高漏失量增大或停泵等因素影响下，堵塞物沉积在旋转喷头上方的沉砂筒内，随着沉砂筒起出带至地面。利用固液两相流体力学对堵塞物进行了受力分析，推导出不同类型的堵塞物上返所需流速的计算公式，并根据力矩平衡原理推导出了旋转喷头正向喷嘴水力参数计算公式。卧51井采用旋转射流联合沉沙筒解堵工艺进行冲砂解堵，15 min冲砂进尺达9.98 m ，解堵效果良好，表明该工艺可以较好地解决低压油气井堵塞的问题，为油气井解堵提供了新思路。
부분유기정인정루실반이무법건립전정순배，전통해도공예난이해결차류유기정적도새，위차개전료선전사류연합침사통해도공예연구。선전사류연합침사통해도공예시이용유관장고압수수송지선전분두형성선전사류，파쇄정저도새물，도새물피상반액운송지일정고도，재배공액주승고루실량증대혹정빙등인소영향하，도새물침적재선전분두상방적침사통내，수착침사통기출대지지면。이용고액량상류체역학대도새물진행료수력분석，추도출불동류형적도새물상반소수류속적계산공식，병근거력구평형원리추도출료선전분두정향분취수력삼수계산공식。와51정채용선전사류연합침사통해도공예진행충사해도，15 min충사진척체9.98 m ，해도효과량호，표명해공예가이교호지해결저압유기정도새적문제，위유기정해도제공료신사로。
Whole‐well circulation could not be built up for some oil and gas wells due to low pressure , and easy circulation loss and traditional blockage removing could not be used to clean these wells .In this paper ,a novel technique was implemeneted ,which involved a new plug removal technology ,in which high pressure water through an oil tube rotates the nozzle ,and rotating jets were formed to break up the bloc‐king‐mass .The broken blocking‐mass would move up in water drive .When the leakage increased or pum‐ping stopped ,the blocking‐mass would deposit in the sand‐tube above the rotating nozzle and be brought to the ground with the sand‐tube .A forced analysis of the blocking‐mass was studied by solid‐fluid mechan‐ics ,and the return flow rates with different silt styles were presented .The equation for calculating hydrau‐lic parameter of rotating nozzle was derived by the moment balance theory .This plug removal technology was applied in Well Wo 51 ,and the blocking‐mass of 9.98 meters was cleared in 15 min .It showed that the removing blockage with rotating jet and sand‐tube turned out to be an effective blockage removing method for wells with low pressure and easy circulation loss .It would provide a novel means to plug removal .