压裂循环阀是井下压裂管串中重要的组成部分,在压裂砂堵后可进行反循环作业,清洗油管内沉砂;同时,在压裂完成后解封时开启循环阀能够平衡油套压差,降低解封难度。目前中原油田在压裂施工中通常采用水力开关式循环阀,研究循环阀内节流孔道,设计合理的阀芯孔道形状,对循环阀的设计制造具有一定的指导意义。 Fracturing valve is an important part of downhole fracturing tube string, after the fracturing sand block can reverse circulation operation, cleaning the tubing grit; the same time, after the completion of fracturing to open the valve when the valve is closed to balance the oil Set pressure, reduce the difficulty of unwinding. At present, Zhongyuan Oilfield usually adopts the hydraulic switch-type circulating valve in fracturing construction to study the orifice passage in the circulating valve and the well-designed orifice shape of the valve core, which is of guiding significance to the design and manufacture of the circulating valve.