... various stages of operations whenever the measurement is made at the surface. These inputs are fed into the engine operating parameters and the hydraulic engine calculates the flow parameters, such as pressure and flow rate along the flow path considered from which ECD, standpipe pressure (SPP), and flow...

..., resulted in successful field applications in similarly complex wells. The new model allowed drilling personnel to identify the parameters most likely to induce fractures. Equivalent circulating density (ECD) had the most impact, followed by minimum horizontal stress, Young’s modulus, fracture length...

... technology conference lcm wellbore integrity management integrity management software wellbore design contingency plan upstream oil & gas drilling fluid management & disposal ecd wellbore integrity circulation drilling fluids and materials information fluid loss pore pressure decision...

... or misinterpreting the dynamics of the drilling margin. This margin represents the boundary between the lowest equivalent circulating density (ECD) necessary to ensure safe operations and wellbore integrity, and the highest ECD tolerable to avoid fluid losses or fracturing below the shoe of the prior casing string...

... conventionally without breaking down the formation because of the high equivalent circulating density (ECD). The greatest contributor to the high ECD is the tight annulus of the liner lap. The model parameters were reversed and the model predicted that a reverse-circulation cementing (RCC) operation would...

... Abstract As offshore drilling operations advance to deeper water and well depths, one of the primary problems faced during circulation is excessive equivalent circulating densities (ECD). This problem becomes acute in the case of extended reach wells, especially where the margins between pore...

... of downhole annulus pressure and temperaure), an extensive campaign was undertaken on recent North Sea ERD wells to compare measured ECDs and static mud densities with hydraulic model predictions. In addition, the effects of drill pipe rotation and reciprocation have been analysed. The hydraulic model used...