TB851.7 98010351反射式双峰值全息滤光片的研制=Study of reflectivehologram filter with bi-peak[刊,中]/何兴道,龚勇清,王庆,赵希圣(南昌航空工业学院.江西,南昌(330034))//光子学报.-1997,26(1).-46-51利用重铬酸盐明胶作为记录介...TB851.7 98010351反射式双峰值全息滤光片的研制=Study of reflectivehologram filter with bi-peak[刊,中]/何兴道,龚勇清,王庆,赵希圣(南昌航空工业学院.江西,南昌(330034))//光子学报.-1997,26(1).-46-51利用重铬酸盐明胶作为记录介质,采用双曝光记录工艺,试制了反射式双峰值波长的全息滤光片,这种全息滤光片双峰值衍射效率可达87,带宽小于10 nm。图5表1参7(李瑞琴)TB877 98010352模压彩虹全息片的衍射效率及其测量=Diffractionefficiency of embossed rainbow holograms andits measurement[刊,中]/哈流柱,霍桂林,王民草(北京理工大学工程光学系.北京(100081))//光学技术.-1997,(1).-28-30。展开更多
It is difficult to determine the optimal weight on bit (WOB) of the double-driven bottomhole assembly (DD-BHA, with double stabilizers and a bent housing positive displacement motor (PDM)) which is employed during ver...It is difficult to determine the optimal weight on bit (WOB) of the double-driven bottomhole assembly (DD-BHA, with double stabilizers and a bent housing positive displacement motor (PDM)) which is employed during vertical and fast drilling. High WOB leads to well deviation out of control, and low WOB leads to low rate of penetration (ROP). So considering the rock physical properties, the anisotropy index function of polycrystalline diamond compact (PDC) bit was derived with the structure and cutting performance parameters of the bit, and the effect of natural hole deviation tendencies on the performance of DD-BHA resisting deviation was represented. The concept of elliptic deformation ratio was used to characterize the performance of DD-BHA resisting deviation. Eventually, a model calculating the critical WOB was established. By comparing the model predictions with the measured hole angle changes in the field, the results show that the model predictions are accurate with error less than 5.8%, which can meet the operational requirements in the projects. Furthermore, the model was adopted to justify and guide the operating conditions and parameters during drilling, which shows that the optimum WOB predicted by the model can not only control deviation but also improve ROP effectively. The model is independent on the formation characteristics of blocks, so it can be expanded widely to other oilfields.展开更多
文摘TB851.7 98010351反射式双峰值全息滤光片的研制=Study of reflectivehologram filter with bi-peak[刊,中]/何兴道,龚勇清,王庆,赵希圣(南昌航空工业学院.江西,南昌(330034))//光子学报.-1997,26(1).-46-51利用重铬酸盐明胶作为记录介质,采用双曝光记录工艺,试制了反射式双峰值波长的全息滤光片,这种全息滤光片双峰值衍射效率可达87,带宽小于10 nm。图5表1参7(李瑞琴)TB877 98010352模压彩虹全息片的衍射效率及其测量=Diffractionefficiency of embossed rainbow holograms andits measurement[刊,中]/哈流柱,霍桂林,王民草(北京理工大学工程光学系.北京(100081))//光学技术.-1997,(1).-28-30。
基金Projects(50804040,51004082)supported by the National Natural Science Foundation of China
文摘It is difficult to determine the optimal weight on bit (WOB) of the double-driven bottomhole assembly (DD-BHA, with double stabilizers and a bent housing positive displacement motor (PDM)) which is employed during vertical and fast drilling. High WOB leads to well deviation out of control, and low WOB leads to low rate of penetration (ROP). So considering the rock physical properties, the anisotropy index function of polycrystalline diamond compact (PDC) bit was derived with the structure and cutting performance parameters of the bit, and the effect of natural hole deviation tendencies on the performance of DD-BHA resisting deviation was represented. The concept of elliptic deformation ratio was used to characterize the performance of DD-BHA resisting deviation. Eventually, a model calculating the critical WOB was established. By comparing the model predictions with the measured hole angle changes in the field, the results show that the model predictions are accurate with error less than 5.8%, which can meet the operational requirements in the projects. Furthermore, the model was adopted to justify and guide the operating conditions and parameters during drilling, which shows that the optimum WOB predicted by the model can not only control deviation but also improve ROP effectively. The model is independent on the formation characteristics of blocks, so it can be expanded widely to other oilfields.
