Work Behavior Simulation and the Structure Improvement Studies of Downhole Deployment Valve

In the process of the under balanced drilling, the use of DDV can reduce the drilling time and protect the oil layer. Although DDV has been successfully used in domestic and foreign oil fields, the poor reliability of the switch action, the sealing property of the DDV and the central glide spindle to valve board impact seriously influence the DDV´s service life. Targeting at these above problems, this paper will contain the movement simulation of DDV using the ADAMS software. The results of the simulation will be used to improve the structure of the central glide spindle to improve its service life.