Study On The Erosion Performance Of The Sliding Sleeve And Soluble Ball In Fracturing

During the hydraulic fracturing,the sliding sleeve tee and fracballs are the key parts in normal fracturing operation.In order to enhance the efficiency of fracturing,the high pressure,large displacement,and long period operation is an effective measure in fracturing operation.But these measures will cause very serious erosion damage,resulting in seal failure or sliding sleeve open failure.In order to reduce the erosion damage in normal fracturing operation,it is extremely essential to research the erosion behavior of sliding sleeve tee and make a reliably soluble fracball.So this paper has carried out the following research:(1)I have Carried out the erosion wear experiment and research.Combined with the experimental results of 5 materials,the paper analyzed the relationship between the different Angle,velocity,concentration,material type and the rate of erosion wear,discovered change trend of erosion rate as the change of different parameters,established a sliding sleeve tee erosion prediction model.(2)Through analyzing microscopic surface of the erosion sample,the paper discussed the mechanism how diffirent angles influenced the erosion rate for plastic material and brittle material respectively,analyzed the characteristic of the sample surface produced by micro cutting and Plastic deformation.(3)Through force analysis and simulation of fracturing ball,the paper got the maximum stress of the fracball in the actual work condition,developed a fracball that can dissolved in drilling fluid,analyzed the relationship between the different magnesium content,temperature and the dissolution rate of the fracball,tested the compressive strength of the soluble ball.