SU937708A1 - Unit for preparing and feeding working fluid to drive hydraulically-driven pumps - Google Patents

Description

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

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The invention relates to petroleum engineering, in particular, to installations for the preparation and supply of a working fluid for driving hydraulic submersible pumps.

A known installation for preparing and supplying a working fluid for driving hydraulic pump pumps, and a centrifugal separator with an inlet and outlet pipe connected to a buffer tank, a sensing element mounted on the outlet pipe and controlled by a normally closed valve, and a pipeline connecting buffer tank with hydraulic pump 1.

A disadvantage of the known installation is the complexity of the design and the complexity of the circuit. We process the working fluid, since the working fluid is separated in a gas, oil and.-water separator with mechanical impurities. For further separation, the contaminated water is transferred to a special container that has a float level regulator that controls the outlet valve. contaminated water and clean water outlet valve. Buffer

The tank also has a level regulator, which is controlled by a valve for discharging excess refined oil. To maintain a certain level of working fluid in the separator, additional pumps are installed in the system.

The purpose of the invention is to simplify the installation design.

This goal is achieved in that the buffer tank is designed as a hydraulic

10 batteries, the hydraulic cavity of which communicates with the separator inlet through a controlled normally closed valve. The drawing shows the scheme of the proposed installation.

The installation consists of a centrifugal separator 1, a buffer tank 2, made in the form of a hydroaccumulator, and a hydraulic pump 3.

The centrifugal separator 1 consists of a rotor 4 with a Pitot tube 5, fitting 6 for

20 gas outlets and nozzles 7 for mechanical outflow of water. The working fluid to the separator 1 is supplied from the well through the inlet pipe 8, the outlet pipe 9 for the release of purified

oil, which is connected to the hydraulic cavity 10 of the buffer tank 2. In the buffer tank 2, the hydraulic cavity 10 is separated by an elastic membrane 11 from the gas cavity 12, which has a charging nipple 13. In addition, a pipe 14 is connected to the separator 1 to drain into the water collection system mechanical impurities.

In the conduit 9, a sensing element 15, which reacts to a pressure change in the conduit 9, controls the valve 16 and the return valve 17, is installed in series.

The hydraulic cavity 10 of the buffer tank 2 is connected by a pipe 18, in which a normally closed valve 19 and a check valve 20 controlled from a sensing element 15 are in series installed with an inlet pipe 8.

The drawing also shows water at 21, oil at 22 and gas 23 in the rotor 4 of separator 1, pipelines 24 and 25 for supplying the cleaned working fluid by pump 3 to the well and housing 26 of separator 1, in which the products of separation are collected from nozzles 7 and brush 6

The installation works as follows.

The working fluid coming from the well through pipeline 8 to separator 1 is an oil and gas mixture. In separator 1, centrifugal forces separate this mixture with the formation of water 21, oil 22 and gas 23 zones. Water with mechanical impurities through nozzles 7 and gas through fitting 6 comes from the housing 26 of the separator 1 to the pipeline 14 and further to the collection system. Here, the fluid flow exiting through the nozzles 7 rotates the rotor 4 of the separator 1.

The cleaned working fluid is pure oil from the rotor 4 is discharged through the Pitot tube 5 under increased pressure through the pipeline 9 to the hydraulic cavity 10 of the buffer tank 2. Under the pressure of the incoming oil, the membrane 11 deforms and compresses the gas in the cavity 12. The pressure in the cavity 10 of the tank 2 reaches equilibrium state, when the oil flows coming from separator 1 and diverted to pump 3 will be equal. In this case, the page interfaces of zones 21-23 in the rotor 4 of the separator 1 are set to the optimum value.

With an uneven flow of the mixture into the rotor 4 (when moving gas plugs or when reducing the thickness of zones 21 and 22)

the pressure in the rotor of the separator 1 and in the pipe 9 is reduced, the sensitive element 15 sends a signal to close the valve 16 and open the valve 19.

The working fluid from the cavity 11 of the buffer tank 2 through the pipeline 18 through the check valve 20 and the pipe 8 enters the rotor 4 of the separator 1. The thickness of the liquid layer in the rotor 4 increases, the pressure rises. The system reaches an equilibrium state, the sensing element 15 opens the valve 16 and closes the valve 19, after which the system operates normally.

Claims (1)

Invention Formula An installation for preparing and supplying a working fluid for driving hydraulically driven pumps, comprising a centrifugal generator with inlet and outlet pipes, communicated with a buffer tank, a sensing element mounted on the outlet pipe and controlling a normally closed valve, and a pipe connecting the buffer tank with the hydraulic actuator characterized by 5 that, in order to simplify the installation design, the buffer tank is made in the form of a hydraulic accumulator, the hydraulic cavity of which is communicated to the generator input through a controlled normally closed valve. Sources of information taken into account in the examination 1. US Patent No. 4044943, cl. 233/19, 1977. From the story Kskbazhine gChDN: 4A