6/11/2023 0 Comments Ejector design calculationWith the aid of the ejector it was maintained on production without having to unload the well periodically to the atmosphere. One of the wells was marginal and would not flow continuously against separator pressure. A successful application of the ejector was made in offshore Louisiana with two gas wells on connecting platforms. This critical velocity for entrainment of liquid in vertical tubing has been estimated to be between 5 and 10 ft/sec. By using an ejector, the wellhead flowing pressure can be effectively lowered, thereby increasing the velocity in the tubing and keeping the well unloaded. Gas wells with flowing pressures that approach the pipeline pressure have a tendency to load up with either the liquid condensate or water that they produce. Until the last few years, however, their use was limited for natural gas service-partially because of the limited amount of available thermodynamic data for natural gas. Ejectors have been in use for some time on other applications, particularly for steam and air service. An ejector is a device which converts pressure energy of a motive stream into kinetic energy, entrains a secondary stream and discharges the combined stream at an intermediate pressure.
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