SU981590A1 - Installation for preparing and supplying working fluid for driving hydraulically driven pumps - Google Patents

Description

(5) INSTALLATION FOR PREPARATION AND SUPPLY OF OPERATING LIQUID FOR DRIVE OF HYDRAULIC DRIVE PUMPS

one

The invention relates to petroleum engineering, and specifically to installations for the preparation and supply of working fluid for hydraulic drive, water submersible pumps.

A known installation for preparing and supplying a working fluid for driving hydraulic pump pumps, comprising a separator with inlet and outlet pipe communicated with a buffer tank made in the form of a hydraulic accumulator, the inlet of which is connected to the hydraulic actuator pump through the power pump and communicated through the return pipeline to the separator inlet , a sensing element mounted on the outlet pipe and controlling the normally closed valve installed in the return pipe at the entrance to the separator 1.

A disadvantage of the known device is its low reliability.

work when servicing several hydraulically driven pumps, since the capacity of the power pump is selected taking into account the excess of the total required quantity of working fluid and its surplus is recycled to the power pump during operation.

The purpose of the invention is to increase the reliability of the installation.

ten

The goal is achieved by the fact that the installation is equipped with a pressure reducing valve and an additional hydraulic accumulator, which are successively installed in the return pipeline before the normally closed valve, and the output of the buffer tank is connected to the return pipeline through the power pump.

20

Claims (2)

The drawing shows a diagram of the installation for the preparation and supply of working fluid to drive the hydraulic pump. 3 The installation contains a centrifugal separator 1, having a rotor 2 with a pitot tube 3, a fitting k for discharging ha with partially oil, and a nozzle 5 for discharging WATER with mechanical impurities, a pipeline 6 for discharging cm into the field gathering system and an inlet pipeline 7, connected to the inlet 8 of the separator 1. The separator is connected by the output pipe 9 to the buffer tank 10, filled in the form of a hydraulic accumulator with the working cavity 11, membrane 12 and cavity 13 for the storage medium. Buffer tank 10 is connected by pipeline 1 to a power pump 15, which is connected by an injection pipe 16 to a manifold 17 having decay regulators 18 for each well. The discharge pipe 16 is connected by a return pipe 19 to an inlet 8 of a separator 1. A sensitive element 20 and a check valve 21 are installed in the output pipe 9. A sensitive element 20 controls a normally closed valve 22 installed in the return pipe 19. A return valve 23 is also installed in the pipe 19, a reducing valve 24 and a hydraulic accumulator 25, with a barrel cavity 2b, a diaphragm 27, and a cavity 28 of the accumulating medium. In addition, the power pump 15 has an overflow pipe 29 with a reducing valve 30. When separator 1 is operated, three zones are installed in its rotor: water to zone 31, oil to zone 32 and gas zone 33. The installation works as follows. The production of the well - oil and gas water to the mixture through pipeline 7 enters the separator 1, where the mixture separates under the action of centrifugal forces. Water with mechanical impurities through the nozzles 5 and the gas partially with oil through the nozzle 4 enters the pipeline 6 which diverts this mixture to the field gathering system. In this case, the flow exiting through the nozzles 5 rotates the rotor 2. In the installation can also be used separator with an active drive. 4 Working fluid — refined oil; from separator 1 through the Pitot tube 3 and output line 9 enters cavity 11 of the buffer tank 10. Under the pressure of the incoming working fluid, membrane 12 deforms and compresses the accumulating medium in cavity 13. Pressure in cavities 11 and 13 reaches the same value, with equal flow of the working fluid coming from the separator 1 and discharged to the power pump 15. In this case, the boundary between zones 31-33 in the rotor 2 of the separator 1 is set to the optimum position. From the buffer tank 10 The liquid enters the power pump 15 and through the pipeline 16 to the manifold 17. When the working pressure of the manifold 17 is exceeded, the reducing valve 2 is activated and the excess working fluid enters the hydraulic accumulator 25. Only in the case of the complete filling of the accumulator 10, the working fluid is bypassed through the pipeline 29 through the pressure reducing valve 30 into the pipeline k. When the mixture enters the separator 1 unevenly, namely when the gas plugs move, the pressure in the rotor 2 of the separator 1 and in the outlet pipe 9 decreases, the sensitive element 20 sends a signal to the normally closed valve 22, which opens and the working fluid from the battery 25 enters the separator 1, whereby the system reaches an equilibrium state and the sensing element 20 closes the valve 22 and the system continues to operate in normal mode. An apparatus for preparing and supplying a working fluid for driving a hydraulically driven pump, comprising a separator with an inlet and an outlet piping connected to a buffer tank made up of a hydraulic accumulator, the outlet of which is connected to the hydraulically driven pump through a power pump and communicated through the return piping to the inlet separator, sensitive element mounted on the outlet pipe And controlling the normally closed valve installed in the return pipeline at the inlet to the separator, characterized in that, in order to increase the reliability of operation, the installation is equipped with a pressure reducing valve and an additional hydraulic accumulator sequentially installed in the valve pipe before the normally closed valve, and the output the buffer tank is connected to the return pipe through the power pump. Sources of information taken into account in the examination one . USSR Author's Certificate in Application No. 2998480 / 25-06. cl. E 21 B, 1980.