Research System Of Gas Immersion Test Device Of Downhole Tools

In order to simulate high temperature and pressure environment of actual oil production process engineering under the laboratory conditions, to carry on high temperature and pressure testing of downhole tools as a whole or its seals which include parker, parking, teflon and so on, and to inspect and evaluate the quality of downhole tools, the system of gas immersion test device of downhole tools is designed in this paper. It provides powerful support means for domestic and international oil field development of new products.This paper designes the system of gas immersion test device of downhole tools based on the modular design concept, which is divided into temperature control system and pressure control system, and include test bench part and monitoring systems part. The selection study of the main components of the system is made on the based of analyzing the working principle of the system. The structure of the system is designed. The monitoring system adopts two-level control based on PLC and IPC, and apply the PID control algorithm which is advanced to control temperature and pressure. The system apply LabVIEW for the application software, which establish the picture of monitoring system for displaying the real-time temperature and pressure curve of the test wellbore. The picture of monitoring system have a good characteristic of man-machine interactive and so on.The test system is debugged, which made two kinds of test, normal temperature and high pressure testing, high temperature and pressure testing. The temperature of the whole system is stabilized at plus or minus 0.5 degree when the system run a long time, the precision of pressure is less than 0.5 FS percent. The precision meet the requirement of technical parameters. The system response time is short.