For the ACF in converter stations,the fundamental wave overcurrent protection is its main resistance protection.During the commissioning of Suidong Converter Station,ACF resistance fundamental wave overcurrent protection tripping has blocked both poles of Yunnan ? Guangdong UHVDC Project.Analyzing the case...
Moreover, the clinging constant of drilling fluid under a narrow annular gap is higher, and the clinging effect of annular fluid is more significant, which will also cause an increase in surge pressure. Figure 14. The relationship between the bottom hole ECD and the dimensionless tool joint ...
Moreover, pumping is useful in reducing the pressure swab during tripping out. With fluid circulation during tripping out, the tripping speed can be increased without increasing the pressure swab; thus, significant tripping time can be saved. Furthermore, in choosing the mud weight, the hydra ...