Application of Ejector Technology to Discharging Wellbore Liquid

Wellbore liquid is an important factor which may bring about a production decline of gas well.In this study,according to the characteristics of wells in gas-gathering station,throught heory study,process design and field test,an ejector technologyh as been applied successfully to low-pressure gas wells of Changqing gasfield.That provides a way to quickly reduce wellhead pressure of low-pressure gas wells and raise instantaneous displacement,so as to discharge the liquid.Experiment shows that the technology can shorten tubing-casing pressure difference in a shortt ime and then discharge the liquid successfully.It is easy to operate to realize a fast discharging by the process switching ing as-gathering station.