Research On Optimization Design Of The Take-out Type Pressure Differential Seal Hanger

This thesis is mainly motivated by the project of “Research on matching tools and the technology of the dewatering gas production system of the low-pressure and low-yielding gas wells” in the affiliated petroleum corporation of Changqing. In the low pressure and low-yielding gas wells, in which injection technology of drainage gas recovery are used, seal balls are at the wrong position after the hangers are set in the pipes of 62 mm inner diameter.What’s more, the displacement of seal balls lead to the incomplete sealing and unable of carrying high weight pump. On the purpose of progressing on the former hanger structure, we try to design removable pressure seal hanger.Specific research work of the thesis reads as follows.First, through the investigation and research on the literature of regular hangers and delivery devices, summarizing of their function and structure characteristics. I had progressed on the regular hanger structure, and the overall theoretical analysis and scheme designed.Second, with the help of Autodesk inventor software, conduct the 3-D virtual modeling,virtual assembling and simulating of actual motion. In this stage we build up the vital theoretical support of production manufacturing and assemblingThird, conduct the numerical simulation of the slip and rubber cylinder of hanger on different situation, according to the actual working parameters of low pressure and low production gas wells in which the injection drainage technology are adopted. The numerical relation between the pressure, stress and structure would help guiding the numerical structure designing of removable pressure seal hanger on advance and even support the research and progress of hanger deliver device.