.... Elongation of washout is of advantage for the displacement, but the enlargement of washout diameter has negative effect. casing and cementing drilling operation well planning geologist geology drilling fluid property drilling fluid chemistry pulse displacement trajectory design equation...

... geometry (pipe diameter, roughness and inclination angle), and fluid flow (flow pattern, superficial liquid and gas velocities, liquid holdup, water cut). The effect of each parameter on the critical particle transport velocity is analyzed to find the most important ones. The evaluations are validated...

... Directional Drilling isaev parting depth rotation rod string application cnsh centralizer artificial lift system inclination angle neftegazovoye mashinostroyeniye diameter polished rod bearing cvn centralizer rod blade installation Research of drill rod breakdown rate in directional wells...

.... The equipment was tested under realistic temperature, pressure, load, and speed conditions in the testing facility. A significant number of wear tests were performed under different conditions, and the results have shown that the weight loss and diameter decrease of the rod guides can be essential already...

... 1 Tolerance on outside diamter, D < 4-½ ±0.79 mm (±0.031 in) > 4-½ +1% D to -0.5% D Table 1 Maximum allowable casing wear by platform Table 2 Casing internal diameter tolerance calculated for pipes commonly used in ACG...

...-lift system for gas production wells. The results of running these four models on six wells for various layers, capacity and diameters are shown in Table 3. After comparing the results of the measured data with the calculation results from the Gray model, it was concluded that the Gray model fits well...

... flowrate was found to be achievable for all power water to produced fluid ratios, without the HSP power water pump discharge pressure exceeding the design limit of 270 barg. Other variables affect the pressure losses through the system: Flowline and wellbore diameters are key variables that need...