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Drilling Engineering
Published in Nwanosike-Warren Quinta, Oil and Gas Engineering for Non-Engineers, 2022
The drilling engineering discipline is involved with drilling wells to access hydrocarbons that are underground. It involves the planning, designing, and costing of wells, as well as planning and implementation of well testing. Drilling engineers will design a drill job for a new well based on information provided to them by the reservoir engineer.
Simplified modeling of laminar helical flow in eccentric annulus with YPL fluid
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2022
Ming Tang, Lang He, Linghao Kong, Shiming He, Taiheng Zhang
For other input parameters other than the rheological property of drilling fluid, the actual drilling engineering shall prevail. Taking the 216 mm borehole as an example, the available drill pipe sizes under drilling conditions are 88.9 mm, 101.6 mm and 127 mm. Considering the influence of drill pipe joints, the corresponding annular diameter ratio is Kd= 0.4 ~ 0.6, the corresponding average annular velocity is v= 0 ~ 1.2 m/s, and the rotary speed is 0 ~ 120 rpm. Taking cementing conditions as an example, the available casing sizes are 177.8 mm, 139.7 mm and 127 mm, the corresponding annular diameter ratio is Kd= 0.65–0.82, the average annular velocity of cementing is v= 0 ~ 0.9 m /s, and the rotary speed during cementing is 0 ~ 40 rpm. For all of the cementing and drilling conditions, the eccentricity set as 0 ~ 0.95 and the converge residual error set as 10−5.
Erosion wear research of wall-attachment jet component based on solid–liquid two-phase flow
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2021
Jialin Tian, Yinglin Yang, Liming Dai, Xiachun Xiao, Jie Wang
Due to the differences in geological conditions and drilling parameters, the large differences are existing in the composition and ratio of drilling fluids (Aftab et al. 2020a). There is necessity to combine the specific conditions of the drilling engineering to complete the configuration of the drilling fluid to meet the needs of the production field (Aftab et al. 2020b). The drilling fluid used in the erosion experiment adopts the conventional ratio, which is mainly composed of clean water, solid particle, bentonite and coated flocculant, and the experimental drilling fluid is 6% Bentonite + 0.2% CX-144B + 1% CX-189 + Barite powder. Among them, the solid phase particle is barite powder, which also acts as the weighting agent. By adjusting the distribution ratio, the viscosity and density of the drilling fluid can be adjusted to 0.02 Pa.s and 1.2 g/cm3, respectively.
Central tube erosion investigation of torque impactor in the deep shale gas formation
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2020
In drilling engineering, the main reason for erosion is the impact of solid particles(quartz sand) carried by drilling fluid on torque impactor. The materials are defined as follows: the liquid water with “water-liquid”, the steel with “Steel”, the carbon steel density of 7850 kg/m3, and the quartz sand with density of 2650 kg/m3. The boundary conditions are defined as follows: the “inlet” as “velocity-inlet”, “Intensity and Hydraulic Diameter” selected in “Specification Method” menu, “Turbulent Intensity” as 5%, “Hydraulic Diameter” as 32 mm, and “escape” selected in the DPM. The exit was set as “outflow”, DPM as “escape”, and the wall condition as “Stationary Wall” with the normal bounce coefficient en as “polynomial” with parameters as 0.993, −0.0307, 0.000475 and −2.62 × 10−6, respectively, and the tangential bounce coefficient et as “polynomial” with parameters as 0.998, −0.029, 0.000643 and −3.56 × 10−6, respectively.