摘要
方钻杆旋塞阀因其优越性能被各大油田用于钻井钻柱内防喷系统,其中密封性能是方钻杆旋塞阀的主要指标之一。经现场调研分析研究得知,密封失效尤其是阀球与阀座间的主密封失效是困扰方钻杆旋塞阀使用寿命的主要因素,密封件材料性能及密封比压直接影响着方钻杆旋塞阀的密封效果。现有方钻杆旋塞阀密封方面的研究成果均是围绕如何设计与改进密封结构而进行的,缺乏对方钻杆旋塞阀密封条件的深入分析及密封所需比压的正确选择与计算,继而难以更清楚地认识方钻杆旋塞阀的密封失效。阐述方钻杆旋塞阀的密封结构及密封机理,简要说明密封件材料的合理选择及强化处理措施,通过阀球与阀座的受力模型分析、依据旋塞阀密封条件及密封必需比压,着重研究主密封的设计。结果表明,课题组对方钻杆旋塞阀主密封的改进设计与所选材料满足最大工作压力的要求,且由工作压力产生的比压足以保证主密封的密封性能,为方钻杆旋塞阀密封设计的进一步完善提供可行的理论依据。
Plug valves are used in the BOP system of drilling pipe within drilling by many oilfield because its superior performance, including sealing performance is one of the main index of plug valves. The results of field survey and analysis concludes that seal failure especially the main seal failure between valve seat and valve bali is the main factor of bothering plug valve＇s service life, sealing material properties and seals pressure directly affect the plug valve＇s sealing effectiveness. Seal research achievements of existing plug valve are focusing on how to design and improve sealing structure, lack of in-depth analysis to seal condition of plug valve and proper selection and calculation to sealing required pressure, so it is difficult to more clearly understood seal failure of plug valve. Expounds seal structure and seal mechanism of the plug valve, briefly explain the reasonable selection and strengthen treatment measures about seal materials, focused research on the main seal design through the valve ball and seat bearing model analysis and according to seal condition and sealing necessary pressure of plug valve. Results show that the main seal design and selected materials of plug valves meet the requirements of the maximum working pressure, and necessary pressure by working pressure produced enough to guarantee the sealing performance of the main seal, providing feasible theory basis for further perfecting to seal design of plug valve.
出处
《液压气动与密封》
2013年第6期70-73,共4页
Hydraulics Pneumatics & Seals
关键词
钻井
内防喷系统
旋塞阀
密封设计
材料
drilling
inner BOP system
plug valve
seal design
materials
