According to the velocity and other parameters of the impact piston, the size of the impact piston switch point is calculated. Based on Newton’s law, the model of the impact piston and reversing valve is established. At the same time, the mathematical method is used to deal with the test curve, and the influence of pressure pulsation characteristics of the front and rear chambers of the impact piston and the left and right valve chambers of the reversing valve on the impact performance of the rock drill is analyzed. This method is used to test the change law of hydraulic oil in the rock drill, by retaining the test holes on the cylinder body and other important components of the hydraulic rock drill.
#Drilling hydraulics program simulator#
The results also indicate that the simulator can be used as an excellent training tool for professionals and students by creating wellbore exercises that can cover different operating scenarios.In the production and manufacturing process of hydraulic rock drill, there are small impact energy and low impact frequency, and a fault diagnosis method based on the internal mechanism testing and testing of the hydraulic rock drill is proposed. This is a step towards real-time hydraulic operations. The user can instantly observe the output results, which allows proper action to be taken if necessary. The simulator allows emulation of real-time hydraulic operations when drilling vertical and directional wells, albeit with a simple BHA for the latter. Thus, by simulating the drilling process, the user can be trained for the upcoming drilling campaign and reach the target depth safely and cost-effectively during actual drilling. The user can observe the output parameters, and by adding a benchmark safety value, the simulator gives a warning of a potential fracture of the formation or maximum pressure at the mud pumps. The overall approach is valid for non-Newtonian drilling fluid pressure losses. The simulator's performance shows excellent matching for a simple BHA, with decreasing system's accuracy as the BHA design becomes more complex, an area of future improvement. The simulated output parameters, ECD and SPP, have similar trends and values with the values from actual field data. The simulation results show promise for application of real-time hydraulic operations. During the simulation, the most critical drilling parameters are displayed, emulating real-time measured values, combined with the pore pressure, wellbore pressure, and fracture pressure graphs. Similarities, differences, and potential improvements were then reported.
The simulator's performance was assessed using separate simulations with different rheological models and compared with actual field data. The resulting simulator hydraulic outputs are the equivalent circulation density (ECD) and standpipe pressure (SPP). To assess the hydraulic model's performance during drilling, the user is required to input the drilling parameters based on field data and match the penetration rate. The simulator allows the input of wellbore and bottom-hole assembly (BHA) sizes, formation properties, drilling parameters, and drilling fluid properties. Several sections with a variety of wellbore sizes were simulated in order to observe the response of the various rheological models. Comparison is then made with pressure losses from field data.ĭrilling data of vertical and deviated wells were acquired to recreate the actual drilling environment and wellbore design. The paper focuses on the predictions of the drilling simulator's pressure losses inside the drill string and across the open-hole and casing annuli applying the most common rheological models. This work was conducted with a simulator capable of recreating the actual drilling process, including on-the-fly adjustments of the drilling parameters. Abstract Challenging wells require an accurate hydraulic model to achieve maximum performance for drilling applications.