In the hydraulic program provided by the Zagros Drilling Company, the following are considered:
Selecting the best drilling fluid rheology model
Critical flow rate at any depth.
Specifications of the DHM and other tools in the wells should be considered.
Try to maximize the bit HHP.
In depths where there is no possibility of optimizing the bit HHP, the amount of impact force will be optimized or the maximum bit pressure drop (Minimum TFA) will be reached.
Best H.S.I. It is possible to choose for any type of bit, due to hole constraints
Try to keep the Nozzle velocity in the best possible way to get the highest ROP.
The scientific optimization module aim is to optimize the hydraulic parameters by the method has been developed in the OptiTech.In addition, the best hydraulic energy is used with regard to any mechanical energy used in such a way as to avoid mechanical and hydraulic energy losses.To optimize the hydraulic parameters by entering the information from the target well (the well is being optimized); first, the Survey Calculation process is performed to obtain all the information about the coordinates of each point in the well, Then the hydraulic parameters are calculated.
In this section, we come up with a selection of fluid rheology model into the hydraulic calculation phase. In the hydraulic module, Hole Cleaning calculations should also be considered to select the best parameters in the vertical and directional wells, as well as the calculation of the hydraulic pressure drop in the hydraulic module will be done by considering corrections such as the cutter load, tool joint, pressure, temperature and … .
All hydraulic calculations in the case where the depth of the Bit is constant (Static), the depth of the Bit is constantly changing (Dynamic-While Drilling), and … will be done by considering all the operational limitations of drilling rig and the inventory of nozzles in different parts of the software . At the end of this section, based on various methods of optimizing the hydraulic parameters, the optimal value of each parameter (TFA, Pump Rate, …) at each depth is determined by ensuring that the hole cleaning is done completely. After selecting the optimal hydraulic parameters in each section and each depth, sensitivity analysis on the Pump Rate at different depths will also be done to achieve the best hydraulic parameters.