The multistage fracturing in openhole horizontal well is an effective technique for developing lowporosity,low-permeability and tight gas reservoirs.However,the low success rate of first-stage differential pressure sliding sleeve reduces the recovery rate.Based on the investigation and analysis of the differential pressure sliding sleeve in the multistage fracturing in openhole horizontal well,the reason of low opening success rate of the domestic differential pressure sliding sleeve is pointed out,i.e.the structural deformation and seal failure of the sliding sleeve.Therefore,based on the existing domestic differential pressure sliding sleeve,the structure of differential pressure sliding sleeve is improved using CAD and Solidworks software.The structure and sealing performance of differential pressure sliding sleeve are analyzed by ABAQUS finite element software.Finally,an indoor test is conducted to verify the rationality of the design.Modified differential pressure sliding sleeve improves the success rate of opening,which can improve the efficiency of oil and gas reservoir stimulation.
openhole horizontal wellmultistage fracturingdifferential pressure sliding sleevefinite element analysisoptimization design
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