Research On Structural Parameters Optimization Design And Experiment Of Hydraulic Torsional Impact Generator

Drilling deep well and ultra deep well for oil and gas has become a trend in the exploitation of oil and gas resources in China.But the environment is complex in the deep earth.The"stick slip"will lead to PDC bit’s crush.Using torsional impact device can effectively avoid this phenomenon.However,there is a problem that the frequency is low and the impact force is small and the twist pressure drop is large.Therefore,it is necessary to study the effect of structural parameters on the working performance of hydraulic torsional impactor and optimize the structural parameters.Based on the study of the literature to summary the type and advantages and disadvantages of the impactor.To study the relationship between the structural parameters of the impactor and the working performance parameters on the basis of working principle of hydraulic torsion impactor.of impactor.Optimize the design of structural parameters,Using the 3D drawing software to optimize the structure of the 6¹/₂″’s hydraulic torsion impactor.It is necessary to analyze and seal the parts that need to be sealed inside the impactor,Then make choice of seal style.Analysis the internal flow path of the torsion impactor.then the model is established and simulated by Ansys.The size of the torsional impactor nozzle is20mm.Machining the torsional impactor according to the final design of the project.Using the torsional impactor to carry out experiments.In the experiment,the data acquisition system is used to collect the data,and the working performance parameters of the impactor are obtained.Then,the data are analyzed.The experiment result shows that the hydraulic torsional impactor starts work when the drilling pump displacement is 7.2L/s.When the displacement of the drilling pump is 0³5L/s,the maximum impact frequency is 35.1Hz,the maximum impact force is 16.1kN,the maximum torsional pressure drop is 4.1MPa.Further analysis shows that the impact frequency is linearly related to the displacement of the drilling pump.The twist pressure drop and the torsional impact force are quadratic relationship with the displacement of the drilling pump.The impact force and the impact frequency are quadrupled.The experimental results verify the correctness of theoretical analysis.