气控环形防喷器密封胶芯大变形分析
|
摘要
针对气控环形防喷器胶芯在密封过程中的大变形以及与油管存在密封压力难以计算的问题,建立胶芯物理模型,结合厚壁筒理论与橡胶本构方程,同时考虑胶芯的材料非线性和几何非线性,探讨防喷器密封过程中胶芯变形与接触压力的变化。根据胶芯变形过程中无变形阶段、自由变形阶段和接触变形阶段的不同受力状况,利用迭代的方法对每个离散微段施加控制压力,得到不同控制压力下胶芯变形量与接触压力,并与仿真结果进行比较。结果表明:在自由变形阶段,随控制压力增加,胶芯变形量逐渐增大且由中间向两侧逐渐减小;在接触变形阶段,胶芯内径保持不变,且与油管间接触压力不断增加。采用胶芯变形理论方法计算的接触压力变化规律与仿真结果基本相同,验证了胶芯变形理论计算方法的正确性。
Aimed at the large deformation of air-controlled annular blowout preventer(BOP) rubber core in sealing process,and the difficulty in calculating the sealing pressure with the tubing,the physical model of the rubber core was set up.Combining the thick-walled cylinder theory with rubber constitutive equation,and by considering the material nonlinearity and geometric nonlinearity of the rubber core at the same time,the rubber core deformation and the contact pressure during the sealing process of the BOP were investigated.According to the different stress conditions during the no-deformation stage,free deformation stage and contact deformation stage of rubber core deformation process,the control pressure to each discrete micro segment was applied by using iterative methods,and the deformation and the contact pressure of the rubber core under different control pressures were obtained.The theoretical analysis results were compared with the simulation results.The results show that,in the stage of free deformation,with the increasing of control pressure,the deformation of the plastic core is gradually increased,and it is gradually decreased from the middle to both sides.In the stage of contact deformation stage,the inner diameter of the rubber core remains unchanged and the contact pressure between the rubber core and the tubing is increased continuously.The change rule of contact pressure calculated by the theory method of rubber core deformation is basically the same as simulation result,which verifies the correctness of the theoretical calculation method of rubber core deformation.
Aimed at the large deformation of air-controlled annular blowout preventer(BOP) rubber core in sealing process,and the difficulty in calculating the sealing pressure with the tubing,the physical model of the rubber core was set up.Combining the thick-walled cylinder theory with rubber constitutive equation,and by considering the material nonlinearity and geometric nonlinearity of the rubber core at the same time,the rubber core deformation and the contact pressure during the sealing process of the BOP were investigated.According to the different stress conditions during the no-deformation stage,free deformation stage and contact deformation stage of rubber core deformation process,the control pressure to each discrete micro segment was applied by using iterative methods,and the deformation and the contact pressure of the rubber core under different control pressures were obtained.The theoretical analysis results were compared with the simulation results.The results show that,in the stage of free deformation,with the increasing of control pressure,the deformation of the plastic core is gradually increased,and it is gradually decreased from the middle to both sides.In the stage of contact deformation stage,the inner diameter of the rubber core remains unchanged and the contact pressure between the rubber core and the tubing is increased continuously.The change rule of contact pressure calculated by the theory method of rubber core deformation is basically the same as simulation result,which verifies the correctness of the theoretical calculation method of rubber core deformation.
引文
[1]王刚.一种新型带压防喷密封系统的研制[D].中国石油大学,2010.
[2]杨永宁,孟庆荣,李俊,等.快卸式筒形防喷器的研制[J].润滑与密封,2015,40(5):125-128.YANG Y N,MENG Q R,LI J,et al.Development of fast assembling and disassembling sleeve blowout preventer[J].Lubrication Engineering,2015,40(5):125-128.
[3]杨建武,邓平,卢韵皎,等.组合环形防喷器:201539227U[P].2010-08-04.
[4]胡霄,翟桂新,胡慧婷,等.补偿式多用途环形防喷器的研制[J].石油矿场机械,2013,42(3):91-93.HU X,ZHAI G X,HU H T,et al.Development of compensatory multipurpose annular blowout preventer[J].Oil field machinery,2013,42(3):91-93.
[5]杨延辉,汤达祯,杨艳磊,等.煤储层速敏效应对煤粉产出规律及产能的影响[J].煤炭科学技术,2015,43(2):96-99.YANG Y H,TANG D Z,YANG Y L,et al.Influence on velocity sensitivity effect of coal reservoir to production law of pulverized coal and gas productivity[J].Coal Science and Technology,2015,43(2):96-99.
[6]SUTTON R P.An accurate method for determining oil PVT proprieties using the Standing-Katzgas Z-fact or chart[J].SPEEvaluation&Engineering,2008,55(2):246-266.
[7]张宝生,陈家庆,许宏奇,等.锥型胶芯防喷器的有限元分析[C]//中国CAE工程分析技术年会暨2007全国计算机辅助工程论文集.大连:中国机械工程学会,2007:225-228.
[8]贾光政,王金友,付海龙,等.带压作业可控柔性密封研究[J].润滑与密封,2008,33(6):85-87.JIA G Z,WANG J Y,FU H L,et al.Research on controllable flexible sealin snubbing service[J].Lubrication Engineering,2008,33(6):85-87.
[9]余长柏,费根生,王海峡,等.高压大通径旋转防喷器胶芯有限元仿真研究[J].江汉石油科技,2012(2):54-57.YU C B,FEI G S,WANG H X,et al.Finite element simulation research on rubber core of high pressure large diameter rotary blowout preventer[J].Jianghan Petroleum Technology,2012(2):54-57.
[10]徐大萍,伍开松,吴霁薇.球形防喷器胶芯失效分析[J].润滑与密封,2012,37(7):71-74.XU D P,WU K S,WU J W,et al.Analysis of failure for rubber core in spherical blowout preventer[J].Lubrication Engineering,2012,37(7):71-74.
[11]唐洋,耿海涛,钟林,等.闸板防喷器密封原理与失效分析[J].润滑与密封,2013,38(2):91-94.TANG Y,GENG H T,ZHONG L,et al.Sealing principle and failure analysis of ram blowout preventer[J].Lubrication Engineering,2013,38(2):91-94.
[12]张群,冯三利,杨锡禄.试论我国煤层气的基本储层特点及开发策略[J].煤炭学报,2001,26(3):230-235.ZHANG Q,FENG S L,YANG X L.Basic reservoir characteristics and development strategy of coalbed methane resource in China[J].Journal of China Coal Society,2001,26(3):230-235.
[2]杨永宁,孟庆荣,李俊,等.快卸式筒形防喷器的研制[J].润滑与密封,2015,40(5):125-128.YANG Y N,MENG Q R,LI J,et al.Development of fast assembling and disassembling sleeve blowout preventer[J].Lubrication Engineering,2015,40(5):125-128.
[3]杨建武,邓平,卢韵皎,等.组合环形防喷器:201539227U[P].2010-08-04.
[4]胡霄,翟桂新,胡慧婷,等.补偿式多用途环形防喷器的研制[J].石油矿场机械,2013,42(3):91-93.HU X,ZHAI G X,HU H T,et al.Development of compensatory multipurpose annular blowout preventer[J].Oil field machinery,2013,42(3):91-93.
[5]杨延辉,汤达祯,杨艳磊,等.煤储层速敏效应对煤粉产出规律及产能的影响[J].煤炭科学技术,2015,43(2):96-99.YANG Y H,TANG D Z,YANG Y L,et al.Influence on velocity sensitivity effect of coal reservoir to production law of pulverized coal and gas productivity[J].Coal Science and Technology,2015,43(2):96-99.
[6]SUTTON R P.An accurate method for determining oil PVT proprieties using the Standing-Katzgas Z-fact or chart[J].SPEEvaluation&Engineering,2008,55(2):246-266.
[7]张宝生,陈家庆,许宏奇,等.锥型胶芯防喷器的有限元分析[C]//中国CAE工程分析技术年会暨2007全国计算机辅助工程论文集.大连:中国机械工程学会,2007:225-228.
[8]贾光政,王金友,付海龙,等.带压作业可控柔性密封研究[J].润滑与密封,2008,33(6):85-87.JIA G Z,WANG J Y,FU H L,et al.Research on controllable flexible sealin snubbing service[J].Lubrication Engineering,2008,33(6):85-87.
[9]余长柏,费根生,王海峡,等.高压大通径旋转防喷器胶芯有限元仿真研究[J].江汉石油科技,2012(2):54-57.YU C B,FEI G S,WANG H X,et al.Finite element simulation research on rubber core of high pressure large diameter rotary blowout preventer[J].Jianghan Petroleum Technology,2012(2):54-57.
[10]徐大萍,伍开松,吴霁薇.球形防喷器胶芯失效分析[J].润滑与密封,2012,37(7):71-74.XU D P,WU K S,WU J W,et al.Analysis of failure for rubber core in spherical blowout preventer[J].Lubrication Engineering,2012,37(7):71-74.
[11]唐洋,耿海涛,钟林,等.闸板防喷器密封原理与失效分析[J].润滑与密封,2013,38(2):91-94.TANG Y,GENG H T,ZHONG L,et al.Sealing principle and failure analysis of ram blowout preventer[J].Lubrication Engineering,2013,38(2):91-94.
[12]张群,冯三利,杨锡禄.试论我国煤层气的基本储层特点及开发策略[J].煤炭学报,2001,26(3):230-235.ZHANG Q,FENG S L,YANG X L.Basic reservoir characteristics and development strategy of coalbed methane resource in China[J].Journal of China Coal Society,2001,26(3):230-235.