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张28井是河南油田在张店地区首次部署的大斜度定向井，斜深3034m．垂深2491m，水平位移926m，最大井斜角74．9°，对钻井中靶精度要求高，钻井施工难度大．介绍了该井的地质、工程设计以及钻井过程中的井眼轨迹控制、井眼清洁和井下安全技术措施等内容，为该地区同类型井的钻井施工提供借鉴．
Well Zhang 28 is the first large-angle directional well to be deployed in the Zhangdian area of Henan Oilfield, with a depth of 3034m. The vertical depth of 2491m, the horizontal displacement of 926m, the maximum inclination angle of 74.9 °, drilling target accuracy requirements, drilling difficult. This paper introduces the geology and engineering design of the well as well as well trajectory control during drilling, wellbore cleaning and technical measures of underground safety and so on, which can provide references for the drilling of similar wells in this area.