Abstract: A device for improving recovery of hydrocarbons through a well is provided. The device creates, regulates and maintains a calculated bottomhole pressure at a desired level and creating above the device a two-phase gas-liquid homogenous flow for efficient lifting of hydrocarbons to a surface. The device has a body having a central through-going opening with a shape corresponding to a shape of a laval nozzle and with a cross section which changes steplessly and gradually, and a mandrel attachable to a tubing and associated with the body without interfering with a flow of fluids.

Abstract: A device for improving recovery of hydrocarbons through a well by creating, regulating and maintaining under the device a calculated bottomhole pressure at a desired level and creating above the device a two-phase gas-liquid homogenous flow for efficient lifting of hydrocarbons to a surface, the device has a body having a central throughgoing opening with a shape corresponding a shape of a Laval nozzle and with a cross section which changes steplessly and gradually, and a mandrel attachable to a tubing and associated with the body without interfering with a flow of fluids.

Abstract: Hydrocarbons are produced from a well having a bottomhole and a wellhead and communicating with a formation, by producing a flow of hydrocarbon-containing formation fluid from the formation at the bottomhole of the well, transforming the flow of the formation fluid from the formation at the location of transformation into a finely-dispersed gas-liquid flow with a liberated gas forming a part of the gas-liquid flow, so that a column of the formation fluid is formed in the well from the depth of the formation to the location of transformation, and a column of the finely-dispersed gas-liquid flow with a liberated gas is formed in the well between the location of the transformation and the wellhead, and automatically maintaining a pressure of the formation fluid at the bottomhole in the well higher than saturation pressure, substantially independently from changes in properties of formation and formation fluid.

Abstract: During a production of hydrocarbons a method and a device are used for producing a flow of hydrocarbon-containing formation fluid from a formation at a bottomhole of a well, automatically maintaining a pressure of the formation fluid at the bottomhole of the well at a level sufficient for maintaining an optimum flow of the formation fluid from the formation at the bottomhole of the well towards a wellhead by changing a parameter of a flow passage of an automatically maintaining unit arranged in the well in response to changes in properties of the formation and formation fluid, and performing the changing of the parameter of the flow passage of the automatic maintaining unit in response to a difference of a formation fluid flow parameter upstream and downstream of the automatic maintaining means.

Abstract: A device for intensification of hydrocarbons production has a substantially tubular hollow body adapted to be arranged inside a well tubing and having an axis and a plurality of passages arranged one after the other in an axial direction and having different dimensions so that hydrocarbons can flow from a bottomhole of the well successively through the passages toward a well head, the body having at least one tubular portion which is provided inside with at least one of the passages and is provided outside with a unit for fixing the at least one portion and therefore the body to the well tubing, the body also having another portion axially spaced from at least one portion and provided inside with at least one of the passages and outside with a unit for sealing the another portion relative to the well tubing.

Abstract: A method of production of the formation fluid is used in wells with a low formation pressure and consists in that in the well from a flow of the formation fluid forcedly liberated is the gas dissolved therein and then the formation fluid is transformed into a finely dispersed gas-liquid flow in which the amount of liberated gas ensures self-lift of the formation fluid to the wellhead. A device, effecting this method, comprises a body hermetically secured in the well string, a nozzle and Venturi tubes. The Venturi tubes are installed over the nozzle, coaxially with it, and each below-positioned tube serves as a nozzle for the above-positioned one.