RU2118719C1 - Oil well finishing and operating pumping unit - Google Patents

Abstract

FIELD: oil producing industry. SUBSTANCE: pumping unit has submersible ejector pump installed in oil well, power pump and separator. Pumping unit is furnished additionally with hydrocyclone and ejector booster pump. The latter is connected to pressure pipeline and to separator for sucking liquid out of the latter. Ejector booster pump for delivering liquids and pipeline for delivering cleaned working liquid to power pump are connected to hydrocyclone, and also pipeline to discharge contaminated liquid from hydrocyclone into separator. EFFECT: improved cleaning of working liquid, increased head. 1 dwg

Description

 The invention relates to the field of oil production using deep pumps.

 Known pumping units for the development and operation of wells, containing a jet pump installed in the well, a power pump for supplying the working fluid to the jet pump and a separator for preparing the working fluid [1].

 A disadvantage of the known pumping unit is that during the development period when pumping out killing fluid and formation fluid with a high content of mechanical impurities from the well, the required quality of working fluid cleaning is not provided.

 The technical problem solved by the invention is to increase the degree of purification of the working fluid, especially during the development of the well, and providing the possibility of increasing the pressure for pumping from the well of the heavy killing fluid.

 To solve these problems, the pumping unit containing a submersible jet pump, a power pump for supplying the working fluid to the jet pump in the well, and a separator for preparing the working fluid is additionally equipped with a booster jet pump and a hydrocyclone. The booster pump is connected to the outlet of the power pump by the working fluid supply line, by the injection pump to the inlet of the hydrocyclone, and by a suction pipe to the separator. The pipeline for draining clean liquid from the hydrocyclone is connected to the input of the power pump.

 During well operation, when the working fluid leaves the separator sufficiently clean, it can be directly supplied to the power pump, and during well development, when it is necessary to remove heavier jamming fluid from the well, the working fluid from the separator is passed through an additional cleaning stage and preliminary pressure increase, t .e. through a hydrocyclone and a booster jet pump.

 The drawing shows a diagram of a pumping unit for the development and operation of oil wells.

 The installation consists of a separator 1 connected by a pipe 2 through a check valve 3 to a power pump 4, which is connected by a discharge pipe 5 to a submersible jet pump 6 installed in a well 7, equipped with a packer 8, separating the cavity 9 (the annular space between the pipeline 5 and the well 7 ) from the oil reservoir 10. The suction nozzle of the jet pump 6. is brought into the sub-packer zone. The installation is also equipped with a hydrocyclone 11, which is connected by a pipe 12 to the pipe 2 in the area between the pump 4 and the check valve Mr. 3. The hydrocyclone 11 is also connected to the separator 1 by a pipe 13 to discharge contaminated liquid. A pipe 14 is connected to the pipeline 5, on which a control valve 15 and a backup jet pump 16 are installed, connected by a pipe 17 with a pipe 2 in the area between the separator 1 and the check valve 3, and a pipe 18 with a hydrocyclone 11. The separator 1 is connected to the well 7 by a pipe 19 , and with a system for collecting oil, gas and water through a pipeline 20.

 Installation for the development and operation of wells works as follows.

 For the first start-up, the separator 1 is filled with clean liquid from the harvesting system. After the pump unit is turned on, the liquid through pipeline 2 through the check valve 3 enters the inlet of the power pump 4 and is supplied under high pressure to the pipeline 5. The main part of the liquid from the pipeline 5 enters the submersible pump 6, into which the liquid from the reservoir 10 is sucked in, which is a mixture of reservoir fluid, kill fluid and mechanical impurities. From the cavity 9 of the well 7, the liquid flows through the pipe 19 to the separator 1. A part of the liquid from the pipe 5 through the pipe 14 through the control valve 15 enters the booster jet pump 16, which draws liquid from the separator 1 through the pipes 17 and 2, by which time the clean fluid is almost replaced by the fluid coming from the well. The mixture of liquids by a booster pump 16 is fed through a pipe 18 to a hydrocyclone 11. The purified working fluid through a pipe 12 and 2 enters the pump 4 and then under high pressure into the pipe 5, while the check valve 3 is automatically closed. Dirty liquid is piped 13 from the hydrocyclone 11 to the separator 1. Excess liquid from the separator 1 enters the oil field system for collecting oil, gas and water.

 After the development of the well and putting it into operation, the line "booster jet pump - hydrocyclone" can be turned off by shutting off the control valve 15.

Claims (1)

 A pump installation comprising a submersible jet pump installed in a well, a power pump connected by a discharge pipe to a submersible jet pump, and a separator, characterized in that it is equipped with a hydrocyclone and a booster jet pump, the latter being connected to a pressure pipe and also to a suction separator liquid from it and to a hydrocyclone for supplying a mixture of liquids into it, and a hydrocyclone is connected to a pipeline for supplying a cleaned working fluid to the power pump and a collection pipe contaminated liquid connected to a separator.