Energy Transimission System And Biade Shap Optimiziation Of Turbodrill

Turbodrill tools as the core technology of underground power drilling,in the field of oil industry has a wide range of applications.Abroad,thanks to the historical accumulation of industry,the use of turbodrill tools with pregnant diamonds and downhole drilling measurement system,making it in the complex geological and inclined wells and other areas far ahead.The study of turbodrill tools will help China to strengthen the exploration and exploitation level of deep sea oilfield,shale gas and so on.Turbine Drill Vortex is a kind of downhole power unit that directly flows the turbine section by a number of stator rotors in turn to push the turbine directly after the turbine rotates.It has a high speed and excellent stability,while the overall structure does not contain rubber.Therefore,the turbo drilling tools are widely used in drilling wells with high stability and drilling in extreme conditions.In order to design meet the requirements of the turbodrill tools,this paper carried out the following aspects of the work:The one-dimensional calculation is used to determine the number of turbine nodes,the geometrical dimensions and the pressure drop of the turbine tool,and then the three-dimensional design of the blade of the turbine section is carried out by Numeca.The numerical simulation is used to verify the working performance of the turbodrill tool,and the flow of the turbodrill tool is analyzed.The results of numerical simulation show that the design of the turbodrill tool in the case of one-dimensional design without considering the viscosity of the drilling fluid is due to the lack of efficiency and the lack of flow,which is difficult to meet the design requirements.In order to meet the design requirements and optimize the performance of the turbine section,the original design scheme is optimized and improved.After analyzing the flow and load distribution,the more suitable design scheme is selected.After the design of the runner width is changed to approximately linearly reduced,the internal efficiency of the turbine is increased from 72.6% to 80.3%,which makes the scheme meet the design requirements.Comprehensive analysis of the thickness,bending.The impact of the arc on the blade type after the design of the turbine section can be in the pressure drop of 72.5KPa under the conditions of the output of 2383 W power to meet the design requirements of 2353 W single power.While leaving a certain work potential,the drive pressure will be increased to the design constraints limit 95 KPa,the speed can be a single section of the turbodrill tool output power to 3611 W.Finally,the performance of the turbodrill tool in the variable condition is discussed,and the influence of the working condition on the performance of the turbodrill tool is simply compared.Viscosity on the performance of the blade changes more complex.Turbodrill tools because of the drilling fluid capacity requirements of the chip makes it a larger viscosity.The effect of viscosity on performance is not linearly related and mainly affects both efficiency and pressure drop.