RU28375U1 - INSTALLATION FOR OPERATION OF OIL WELL - Google Patents

Abstract

Installation for the operation of an oil well, containing a separator with lines for the removal of liquid and gaseous media, a pump, the suction pipe of which is connected to the drain line of the liquid medium, and an ejector, the active nozzle of which is connected to the discharge pipe of the pump, passive - to the source of the pumped medium and exit to the separator characterized in that a gas ejector is installed in the exhaust line of the gaseous medium.

Description

Installation for the operation of an oil well

The utility model relates to devices for oil production and can be used in the oil and gas industry for the operation of oil wells in oil and gas condensate fields under low reservoir pressure or at a late stage of field development.

A well-known installation for the operation of an oil well, comprising a jet pump, lowered into the well on tubing (1ZHT), a packer that moves the pump away from the lift, a power pump station installed on the surface, including a power pump and a separator with a working fluid supply line to the well and gas outlet. The jet pump consists of a housing, an insert jet device with interchangeable nozzles and a diffuser. Oilfield development with directional wells / Evchenko B.C. et al. - M.: "Nedra, 1986, pp. 98-102.

The working fluid is pumped into the tubing of an oil well by a power pump; at a high speed, it flows out of the nozzle into the displacement chamber of the jet apparatus, where the produced fluid enters, and reports the lifting energy to it. The packer provides a differential pressure generated by the jet pump. The mixture of formation fluid from the working is sent to a separator, in which there is a separation into gas and liquid (oil and water). Part of the fluid is used as the working fluid supplied to the well.

A disadvantage of the known installation is the need for periodic shutdown and thickening of wells (with its subsequent development), lifting the jet pump for maintenance and repair work, which leads to loss of formation products.

Closest to the proposed utility model is a pump-ejector installation containing a three-phase separator with a gas discharge pipe and pipes for discharging the working fluid and light fraction, a pump, the suction pipe of which is connected to the pipe for discharging the working fluid, and a liquid-gas ejector, the active nozzle of which is connected to the discharge a pump nozzle, a passive fluid supply nozzle to the source of the pumped medium, and the outlet to the separator. At the same time, the light fraction outlet pipe is connected to the suction port of the pump. RF patent No. 1588925, 5MPK F04F 5/54, publ. 08/30/90.

A disadvantage of the known installation is the insufficient decrease in bottomhole pressure due to ejection of the pumped production of the well with the help of one ejector, the possibility of which is to reduce pressure at the wellhead while ensuring the required flow rate

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limited by the capacity of the power pump and the existing geometry of the jet apparatus, which leads to a decrease in oil flow from the reservoir, to a decrease in well production and a decrease in oil production.

The objective of the claimed utility model is to increase oil output by lowering bottomhole pressure.

The problem is solved by the installation for the operation of an oil well containing a separator with lines for the removal of liquid and gaseous media, a pump, the suction pipe of which is connected to the discharge line of the liquid medium, and an ejector, the active nozzle of which is connected to the discharge pipe of the pump, passive - to the source of the pumped medium and the outlet is to the separator, while a gas ejector is installed in the gaseous medium discharge line.

The technical result obtained at the same time consists in providing the possibility of further lowering the bottomhole pressure, creating additional depression on the formation and increasing the flow of oil into the well.

The drawing shows a diagram of an installation for the operation of an oil well.

The installation comprises a separator 1 with a supply line for production of a well 2 and gas exhaust lines 3, oil 4 and produced water 5, a pump 6, the suction pipe of which is connected via line 7 to the oil exhaust line 5 from the separator, and an ejector 8, the active nozzle of which is connected to the discharge pipe of the pump through line 9, passive to the source of the pumped medium, and the output through line 10 to the separator 1. A gas ejector 11 is installed on the gas exhaust pipes 3, the active nozzle of which is connected to the gas supply line 12 from the gas manifold, and the output is to the gas supply line and to the consumer 13. An oil supply line for further preparation 14 is connected to the oil diversion line 4.

Installation works as follows.

The production of an oil well in the form of a gas-liquid mixture flows through line 2 to a separator 1, where oil is separated from oil gas and produced water. Part of the oil discharged through line 4 from the separator is sent along line 14 for further preparation, and part along line 7 is received by pump 6 and then, through line 9, under high pressure it enters the active nozzle of ejector 8. Passing through the nozzle, the oil sharply increases its speed potential, sucking in a gas-liquid mixture entering the passive nozzle along the supply line of well 2. After mixing the oil with the produced products and passing the diffuser, the potential energy is converted into kinetic energy, which leads to izheniyu pressure in the mixing chamber and, consequently, the wellhead pressure, and accordingly to increased drawdown. A mixture of oil with reservoir products from the ejector 8 through line 10 is sent to the separator 1. The separated formation water from

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separator 1 is discharged along line 5 for preparation with subsequent disposal.

Degassing gas from the separator 1 through the gas exhaust line 3 enters the passive nozzle of the gas ejector 11, to which gas is supplied as an active agent through the gas supply line 12 coming from gas wells of the oil and gas condensate field. The jet of active gas leaving the nozzle captures the gas discharged from the separator. As a result of mixing the active and sucked-in gases in the mixing chamber, a decrease in pressure occurs, and, consequently, a decrease in pressure in the line to the ejector. This achieves an additional reduction in pressure at the wellhead. Gas from the ejector 11 under pressure through line 13 is directed to the consumer.

Thus, the use of the proposed utility model will allow, due to the successive decrease in pressure directly at the wellhead and the separator, to create additional depression on the formation and increase oil flow into the well at minimal cost for reconstruction of existing technological schemes.

Claims (1)

Installation for the operation of an oil well, containing a separator with lines for the removal of liquid and gaseous media, a pump, the suction pipe of which is connected to the drain line of the liquid medium, and an ejector, the active nozzle of which is connected to the discharge pipe of the pump, passive - to the source of the pumped medium and exit to the separator characterized in that a gas ejector is installed in the exhaust line of the gaseous medium.