A Study And Application On Combining Killing And Controlling For Pressure Overhaul Technology

Pressure workover is to rely on tubing tamper acting in concert with special well control equipment,and pull or push the Columns controled by Pressure device without killing and blowout to achieve Construction purposes.Because many advantages with pressure workover that has an important significance to oil field development,in recent years many companies are researching and developing Pressure work over,currently Pressure minor repair techniques is Mature,the pressure overhaul Technology which under pressure small repair technology has some development,but there are many problems,overhaul capability is greatly restricted and unable to meet production requirements.This paper proposes combining killing and controlling for pressure overhaul technology concepts,that means controling wellbore pressure by workover fluid before workover with pressute.Wellhead pressure is not higher than 2Mpa in the workover process.Retain much advantages of conventional workover with pressure which includes:not discharge pressure,not loss formation energy,green,and improve efficiency,increase torque to xie cards and milling,reduce risk.This paper demonstrated the combining killing and controlling for pressure overhaul technology,and researched equipment,tools and key technology solutions of combining killing and controlling for pressure overhaul technology.Solve a series of problems,developed a series of equpment and tools.Carried out a comprehensive test.Establishmented procedures and processes according to actual situation,evaluated application results of this technology.The techniques described in this article can provide reference for overhaul technology research with pressure,the essay mentioned some question need discussed more,and to perfect the domestic belt press overhaul technology had important significance.