The Research Of Multistage Sliding Sleeve Coiled Tubing Broken Down Of Horizontal Well In Jilin Oilfield

In many years,a large number horizontal wells is developed in Jilin oilfield.The horizontal well fracturing method is variety.And the well completion method is diverse.Most of the horizontal well fracturing using the multilevel sliding sleeve pitch bare pipe.The sliding sleeve tee sizes per level from the hanger to the pressure sliding sleeve is different.Maximum reach 92 mm,Minimum is 41 mm.In the process of fracturing implementation often encounter the pressure plugging problems.After pressure plugging,subsequent fracturing can’t construct on time.Influence the oilfield productivity construction and the oilfield development.In addition,the strict environmental protection to the environment,adopts the conventional solutions of plugging process cannot pass sliding sleeve and unable to control borehole energy.Once broken down success,fracturing horizon will release energy.Release the energy transfer to the mouth of the well is hard to control,causes drilling accidents and environmental pollution.This kind of situation in the oil industry and the country is prohibited.According to the above problem,this paper studies the horizontal multistage sliding sleeve coiled tubing broken down,from inside the coiled tubing fluid flow pressure drop loss theory,study the pressure drop in the process of the whole system,coiled tubing broken down in front of the blockage device construction simulation and reconciliation special tools.Solving the above problem,can quickly and efficiently through the different size of the sliding sleeve,bottom hole pressure can effectively control is passed to the wellhead of accidents.Study the horizontal multi-stage sliding sleeve coiled tubing broken down technology,not only to solve different problems in the development of horizontal Wells in jilin oilfield,and promote the coiled tubing operating technique in jilin oilfield.