The time evolution of populations of the ground state hyperfine Zeeman levels of ^(87)Rb atoms is analyzed using the Runge-Kutta method for the case that a rubidium beam is optically pumped,under different conditions ...The time evolution of populations of the ground state hyperfine Zeeman levels of ^(87)Rb atoms is analyzed using the Runge-Kutta method for the case that a rubidium beam is optically pumped,under different conditions of polarization,with a weak monochromatic laser and an ^(87)R lamp.On the base of the results above,the least estimated laser and ^(87)R lamp power for the best population inversion is obtained,aiding further investigations.展开更多
为解决大斜度、中高含水油井杆管的腐蚀、结垢和偏磨问题,应用了内衬油管配套外裹抽油杆技术。采用此技术可减少井下原油从井底流动到井口自然热量损失,提高原油井口温度;还能减少杆管之间的摩擦阻力,解决油管的内腐蚀、结垢和杆管偏磨...为解决大斜度、中高含水油井杆管的腐蚀、结垢和偏磨问题,应用了内衬油管配套外裹抽油杆技术。采用此技术可减少井下原油从井底流动到井口自然热量损失,提高原油井口温度;还能减少杆管之间的摩擦阻力,解决油管的内腐蚀、结垢和杆管偏磨问题。现场6口井试验应用后,油井平均检泵周期延长320.83天,抽油机悬点最大负荷平均下降11.08 k N,年节省缓蚀阻垢剂13.687 5 t,平均日节电34.17 k Wh,年节约电费约5.2万元。展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 11174015the Fundamental Research Funds for the Central Universities.
文摘The time evolution of populations of the ground state hyperfine Zeeman levels of ^(87)Rb atoms is analyzed using the Runge-Kutta method for the case that a rubidium beam is optically pumped,under different conditions of polarization,with a weak monochromatic laser and an ^(87)R lamp.On the base of the results above,the least estimated laser and ^(87)R lamp power for the best population inversion is obtained,aiding further investigations.
文摘为解决大斜度、中高含水油井杆管的腐蚀、结垢和偏磨问题,应用了内衬油管配套外裹抽油杆技术。采用此技术可减少井下原油从井底流动到井口自然热量损失,提高原油井口温度;还能减少杆管之间的摩擦阻力,解决油管的内腐蚀、结垢和杆管偏磨问题。现场6口井试验应用后,油井平均检泵周期延长320.83天,抽油机悬点最大负荷平均下降11.08 k N,年节省缓蚀阻垢剂13.687 5 t,平均日节电34.17 k Wh,年节约电费约5.2万元。