在油井采油过程中,为了达到降低油井负荷,节能降耗,延长油井免修期的目的,在油井上应用了电磁防蜡装置,能产生变频强电磁场,引起蜡分子的内共振,导致蜡晶结构与形状发生变化,抑制了蜡分子的结晶过程,同时对已形成的蜡晶产生一定的破碎作...在油井采油过程中,为了达到降低油井负荷,节能降耗,延长油井免修期的目的,在油井上应用了电磁防蜡装置,能产生变频强电磁场,引起蜡分子的内共振,导致蜡晶结构与形状发生变化,抑制了蜡分子的结晶过程,同时对已形成的蜡晶产生一定的破碎作用,从而达到防蜡的效果。2015年7月在长庆油田第七采油厂白豹油田10口油井现场应用表明,油井悬点负荷平均下降了14.91%,系统效率平均提高了5.61%,负载电流平均下降了17.83%,平均有功节电率为19.87%,无功节电率为12.72%,综合节电率为18.73%,油井平均日节约电22.8 k Wh。展开更多
The invariant, propagator, and wavefunction for a variable frequency harmonic oscillator in an electromagnetic field are obtained by making a specific coordinate transformation and by using the method of phase space p...The invariant, propagator, and wavefunction for a variable frequency harmonic oscillator in an electromagnetic field are obtained by making a specific coordinate transformation and by using the method of phase space path integral method. The probability amplitudes for a dissipative harmonic oscillator in the time varying electric field are obtained.展开更多
In this work, a numerical study for designing a new kind of MHD （Magneto-Hydrn-Dynamic） pumps is presented. This technique makes a compromise between electrolysis prevention and high flow rate performance. This tech...In this work, a numerical study for designing a new kind of MHD （Magneto-Hydrn-Dynamic） pumps is presented. This technique makes a compromise between electrolysis prevention and high flow rate performance. This technique should eliminate electrolytic bubble generation, electrodes wear and fluid propriety modification. All these side phenomena are prevented by considering isolated electrodes. The numerical presented results in this paper demonstrate that continuous MHD pumping is possible with isolated electrodes. The MHD excitation combines a high frequency altering current with a low frequency altering magnetic field. In order to validate our results, two independent theoretical methods for computing flow rate are followed. The two presented independent approaches show that high flow rate is possible even with isolated electrodes. To overcome the problem of dimensioning this kind of pumps, a generic numerical analysis is proposed. Hence, the pump performances as functions of the external parameter are studied and tools to calculate for a given fluid and the optimal high frequency regime are provided.展开更多
文摘在油井采油过程中,为了达到降低油井负荷,节能降耗,延长油井免修期的目的,在油井上应用了电磁防蜡装置,能产生变频强电磁场,引起蜡分子的内共振,导致蜡晶结构与形状发生变化,抑制了蜡分子的结晶过程,同时对已形成的蜡晶产生一定的破碎作用,从而达到防蜡的效果。2015年7月在长庆油田第七采油厂白豹油田10口油井现场应用表明,油井悬点负荷平均下降了14.91%,系统效率平均提高了5.61%,负载电流平均下降了17.83%,平均有功节电率为19.87%,无功节电率为12.72%,综合节电率为18.73%,油井平均日节约电22.8 k Wh。
文摘The invariant, propagator, and wavefunction for a variable frequency harmonic oscillator in an electromagnetic field are obtained by making a specific coordinate transformation and by using the method of phase space path integral method. The probability amplitudes for a dissipative harmonic oscillator in the time varying electric field are obtained.
文摘In this work, a numerical study for designing a new kind of MHD （Magneto-Hydrn-Dynamic） pumps is presented. This technique makes a compromise between electrolysis prevention and high flow rate performance. This technique should eliminate electrolytic bubble generation, electrodes wear and fluid propriety modification. All these side phenomena are prevented by considering isolated electrodes. The numerical presented results in this paper demonstrate that continuous MHD pumping is possible with isolated electrodes. The MHD excitation combines a high frequency altering current with a low frequency altering magnetic field. In order to validate our results, two independent theoretical methods for computing flow rate are followed. The two presented independent approaches show that high flow rate is possible even with isolated electrodes. To overcome the problem of dimensioning this kind of pumps, a generic numerical analysis is proposed. Hence, the pump performances as functions of the external parameter are studied and tools to calculate for a given fluid and the optimal high frequency regime are provided.
