摘要
针对井下高温环境导致随钻测量仪器精度失准的问题,研制了ZLZY310高温钻井液冷却系统。基于换热理论,分析了钻井液入井温度对井下钻井液温度的影响,考虑了钻井液静止时的温度变化情况,确定了装置降温的技术参数。钻井液冷却系统采用板式热交换器,换热效率高达85%以上;换热后的水由多组冷却塔散热,利用风冷与蒸发散热原理进行散热;设计了钻井液反冲洗流程,采用反冲洗的方式解决钻井液中杂质堵塞管路的问题。钻井液冷却系统在油田开展了现场应用,钻井液处理量高达150~260 m 3/h,对比同类冷却装置降温效果显著。钻井液循环降温能力满足现场作业要求,降低了地层温度对井下工具的影响。研究成果可为钻井过程中钻井液降温、反冲洗等工艺提供有效的技术支撑。
To solve the problem of inaccuracy of MWD instruments caused by downhole high-temperature environment,ZLZY310 high-temperature drilling fluid cooling system was developed.Based on the heat exchange theory,the influence of the drilling fluid entry temperature on the temperature of downhole drilling fluid was analyzed and the temperature change of the drilling fluid when it is still was considered,the technical parameters of the cooling system were determined.With plate heat exchanger,the heat exchange efficiency of drilling fluid cooling system is over 85%.The heat-exchanged water is dissipated by several sets of cooling towers,which work based on the principle of air cooling and evaporation.The backwashing process of drilling fluid was designed,which can solve the problem of pipe plugging by impurities in drilling fluid.The drilling fluid cooling system has been applied in the oil field,and the processing capacity of drilling fluid reaches up to 150~260 m 3/h,which has obvious cooling effect compared with similar cooling devices.The circulating cooling capacity of drilling fluid meets the requirements of field operation and reduces the influence of formation temperature on downhole tools.The research results provide effective technical support for drilling fluid cooling and backwashing processes during drilling.
作者
李胜忠
张铜鋆
聂军
杨智钰
吕合军
包秋民
Li Shengzhong;Zhang Tongjun;Nie Jun;Yang Zhiyu;LüHejun;Bao Qiumin(Equipment Management Department,Sinopec Zhongyuan Oil Engineering Co.,Ltd.;Sinopec Petroleum Engineering Drilling Instrument and Solid Control Technology Center;Drilling Engineering Technology Research Institute,Sinopec Zhongyuan Oil Engineering Co.,Ltd.)
出处
《石油机械》
北大核心
2022年第8期46-51,共6页
China Petroleum Machinery
基金
中石化中原石油工程有限公司科研项目“高温钻井液冷却装置先导试验”(2020112X)。
关键词
钻井液
冷却系统
板式换热器
冷却塔
反冲洗
drilling fluid
cooling system
plate heat exchanger
cooling tower
backwashing
