Numerical Simulation and Optimization Design of the Annular Mechanical Foam Breaker
محل انتشار: ماهنامه بین المللی مهندسی، دوره: 25، شماره: 2
سال انتشار: 1390
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 763
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شناسه ملی سند علمی:
JR_IJE-25-2_020
تاریخ نمایه سازی: 17 خرداد 1393
چکیده مقاله:
The annular foam breaker is one which uses the vacuum and shear force generated by the Coanda effect to break foam. The pressure distribution directly affects its performance. So an investigation on the flow characteristics inside the annular foam breaker is important to optimize its structure. In this paper, the computational fluid dynamics (CFD) code, FLUENT, is employed to simulate the flow phenomena. The effect of various geometric parameters on the pressure distribution inside the annular foam breaker has been evaluated, including the width of the annular slot, the Coanda surface radius and the diffuser dimensions, etc. The numerical results show that the optimum value of the annular slot d = 0.5mm, the Coanda surface radius r = 20mm, the diffuser angle θ=6°, and the ratio of the diffuser length to radius is more than 14. Based on these analyses, an optimum structure of the annular foam breaker was designed and tested in the well bore flow simulation loop laboratory equipment. Compared with the old ones, the foam-breaking efficiency of the optimized annular foam breaker is improved from 71.16% to 86.58%, which increases by some 22.61%.
کلیدواژه ها:
Foam drilling/ Mechanical foam breaker/ CFD analysis/ Coanda effect
نویسندگان
p.l cao
College of Construction Engineering, Jilin University, ۱۳۰۰۲۶, Changchun, China
b.y chen
College of Construction Engineering, Jilin University, ۱۳۰۰۲۶, Changchun, China
z.c zheng
College of Construction Engineering, Jilin University, ۱۳۰۰۲۶, Changchun, China
w.y ma
Drilling Engineering Technology Institute, Zhongyuan Petroleum Exploration Bureau, Puyang, ۴۵۷۰۰۱, China