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The article presents modern constructions of sand well separators. The technology is based on a sand separator, which contains a body with an opposite re-winded bilifar helix and a coaxially installed mesh blanket. There are three center-by-deck adapter subs and three fishings installed inside the body. Well fluid sifting of sand and solids is based on usage of the physical process: a centrifugal effort and a scattering phenomenon. Modern constructions of sand well separators are more and more similar to the classical form of Ranque-Hilsch vortex tube. Features of liquid flowing in the vortex tube are used to create an effective construction of the sand well separator. Expansion of Ranque-Hilsch vortex tube attachments is connected with putting additional elements in operation in the central part of the tube. Sizes of the added internal tube in the vortex tube are optimized. Development trends of the sand well separator construction are defined taking into consideration Ranque-Hilsch vortex tube.

Vortex tube in well separators