RU215371U1 - HORIZONTAL PUMP UNIT - Google Patents

Abstract

The utility model relates to the oil and gas industry and is used for pumping hydrocarbons from the well stock and mobile well development units. The technical result is the mobility of the device. The technical result is achieved by the fact that the horizontal pumping device includes a production string made as a case, inside which is located a centrifugal pump, instrumentation and automation equipment, including a pressure sensor for measuring pressure at the inlet to the pumping device, a pressure sensor for measuring pressure at flow line from the pumping device, a liquid flow sensor to record the volume of pumped products, a check valve mounted on the flow line to prevent back pressure on the centrifugal pump inside the production string, there is also a hermetically sealed electric motor with cable entry, and the centrifugal pump is fixed with centralizers , while the column consists of pipes connected by a threaded connection, a pressure sensor for measuring the pressure at the inlet to the pumping device is installed on the pipeline in front of the production string, behind the production The X-mas tree is installed in the back, which is gate valves of the ZMS and ZKL types, connected by means of a column flange, a pressure sensor for measuring pressure in the flow line from the pumping device is located behind the X-mas tree, two pipeline lines are installed behind the X-mas tree, one of them has a shut-off valve for for carrying out technological operations, shut-off valves for routine maintenance and a flow sensor are installed on the second pipeline line, a throttle valve is installed behind the check valve to control the volume of fluid flow pumped by the pump. 2 ill.

Description

The utility model relates to the oil and gas industry and is used for pumping hydrocarbons from the well stock and mobile well development units.

A horizontal pumping unit is known from the prior art (RU 2692873, publ. 06/28/2019, Bull. No. 19), containing an inlet pipe, hydraulic protection, an electric motor and a pump, the shafts of which are connected to each other by a splined coupling; a shaft, in the hydraulic protection flow channels are formed, hydraulically connecting the inlet pipe to the tubular shaft, the other end of which is connected to the pump through the holes in the splined coupling. The disadvantage of this technical solution is the lack of automation of the process, namely, the lack of pressure control at the inlet and outlet of the installation, with the output of parameters to the upper level, as well as control and accounting of the volume of the pumped liquid.

Known pumping unit (RU 2747185, publ. 29.04.2021, Bull. No. 13), which includes an electric motor in a sealed version with cable entry and a centrifugal pump. The unit has a body in the form of a pipe with supports, connected to the pipeline by means of flange connections and equipped with a branch pipe with a cable entry placed in it. The hermetically sealed electric motor and the centrifugal pump are located in separate housings of the pumping unit, made in the form of pipes with supports. The pipes are connected to each other through a branch pipe with cable entry. The pumping unit is located horizontally, and its supports are made similar to the pipeline supports. The disadvantage of this technical solution is the lack of automation of the process, namely, the lack of pressure control at the inlet and outlet of the installation, with the output of parameters to the upper level, as well as the control and accounting of the volume of liquid pumped by the installation, also with the output of parameters to the upper level.

The task to be solved by the claimed utility model is the development of a horizontal pumping unit with preliminary gas separation.

This problem is solved by the fact that the horizontal pumping unit includes a hermetically sealed electric motor with a cable entry and a centrifugal pump, a housing, equipment for instrumentation and automation, including a pressure sensor for measuring the pressure at the inlet to the pumping station, a pressure sensor for measuring the pressure at the flow line from the pumping station, a liquid flow sensor to record the volume of pumped products, shut-off valves for carrying out technological operations, also contains a check valve mounted on the flow line to prevent back pressure on the centrifugal pump and a throttle valve mounted on the flow line after the check valve for regulation of the volume of fluid flow pumped by the pump, while the housing is a production string, made as a case, inside which is located a centrifugal pump, fixed with centralizers, the connection of the housing with the pipes It is connected by means of a threaded connection, and the X-mas tree is connected to the production string by means of a column flange.

The technical result is the mobility of the device. An additional effect is the improvement of operational characteristics due to the presence of a process of preliminary gas separation before installation, due to the availability of instrumentation and automation equipment.

The claimed installation is used for a reservoir pressure maintenance system (injection of a working agent into the reservoir from the installations for the primary preparation of hydrocarbon raw materials).

The essence of the proposed technical solution is illustrated by drawings, which show:

figure 1 - diagram of the pumping unit,

figure 2 - case for the pump, where

1 - pressure sensor

2 - pump

3, 4, 5, 6 - shut-off (fountain) fittings type ZMS

7, 8, 11, 13, 14 - shut-off (fountain) valves type ZKL

9 - pressure sensor

10 - pressure sensor

12 - fluid flow sensor

15 - check valve

16 - throttle valve

17 - centralizer

18 - electric motor

19 - threaded connection

20 - column flange

21 - cable entry.

A horizontal pumping unit (HPU) is a mobile device installed above ground on a frame base that is not connected to the ground.

The unit has a body in the form of a pipe connected to the pipeline by means of flange connections.

The composition of the horizontal pumping unit includes an electric centrifugal pump 2 with a production string and centralizers 17, an electric motor 18 in a sealed version with a cable entry 21, instrumentation and automation.

The electric centrifugal pump is located inside the production string, made as a case, and fixed with the help of centralizers. An electric centrifugal pump sets the required pressure in the piping system. Centralizers are designed to center the electric centrifugal pump inside the production string.

The column consists of pipes connected by means of a threaded connection 19. X-mas trees are connected to the production string by means of a column flange 20.

As an instrumentation and A, the installation contains a pressure sensor 1, designed to measure the pressure upon admission to the pumping station, a pressure sensor 10, designed to measure the pressure in the flow line from the pumping station, a liquid flow sensor 12, designed to record the volume of pumped products, shutoff valves 14, intended for carrying out technological operations.

Stop valves 4, 5, 6, 7, 8 are part of the X-mas tree valves (AFKE K1, K2 65x35, 80x35, 100x35). The type of this valve is gate valves. Fittings 4, 5, 7 are designed to supply / output products through connected field pipelines. Fittings 6, 8 are designed to disconnect the pumping unit from the main pressure pipeline. Shut-off valves 11, 13, 14 are designed for routine maintenance.

The horizontal pumping unit is installed on a frame base made of a 100-150 mm channel, mounted on concrete slabs.

Check valve 15 is designed to prevent the impact of counterpressure from the pumping unit on the electric centrifugal pump. The check valve is installed on the discharge line.

Throttle valve 16, mounted on the flow line of the pumping unit after the check valve, is designed to control the volume of fluid flow pumped by the pumping unit.

The entry of hydrocarbon feedstock or working agent into the pumping unit is provided from one pressure source.

The output of hydrocarbon feedstock or working agent from the pumping unit is provided by technical solutions to several consumers.

The claimed installation is designed for pumping hydrocarbons from the well stock with preliminary gas separation, and for the reservoir pressure maintenance system.

With the help of X-mas trees installed after the pumping unit, it is possible to divert gas through valves from the annulus of the production string to the flare or own needs. The side outlet of the X-mas tree (valve 7) allows you to perform technological operations (flushing, reagent supply, etc.).

A horizontal pumping unit when pumping hydrocarbons is necessary to reduce the linear pressure at the well pad during operation without first discharging gas to a gas fractionation unit using dispersants (as part ^of the ESP assembly, the pumping volume will be up to 1000 m m ³ / day for gas).

Additionally, the entire system will be automated, with the possibility of remote control.

The oil product is pumped with preliminary gas separation, namely, the hydrocarbon mixture produced from the well stock enters the oil and gas separator mounted in front of the pumping unit, where the gas phase is separated from the liquid phase, reaching a gas content in liquid of no more than 25%. The separated gas from the oil and gas separator is sent to a horizontal flare unit, and the hydrocarbon mixture is fed to the intake of a horizontal pumping unit with subsequent pumping into an external transport pipeline.

A similar process occurs during the injection of commercial water into the formation, with the exception of preliminary gas separation. The incoming volume of commercial water to the primary oil treatment units, after technical sludge, is sent to the pumping unit with further injection into the injection well, with pressure and fluid flow control due to the installed instrumentation equipment.

The method of connecting the pumping unit to the pipelines is detachable through a flange connection. Productivity up to 5000 m ³ / day. The pressure range at the HPU inlet is 0.4-20.0 MPa. The design pressure of the HPU for pumping oil is 6.3 MPa, the HPU for injection is 25.0 MPa. The pressure range at the outlet of the HPU is 1.0-22.0 MPa, at the outlet 1.0-25.0 MPa. For the transport of hydrocarbons from wells, a horizontal well is required for preliminary gas release. HPU length, depending on the required output pressure, up to 100 m. Production string diameter (case for ESP) from 168 mm to 245 mm.

Claims (1)

Horizontal pumping device, including a production string made as a case, inside which a centrifugal pump is located, instrumentation and automation equipment, including a pressure sensor for measuring pressure at the inlet to the pumping device, a pressure sensor for measuring pressure in the flow line from the pumping device , a liquid flow sensor to account for the volume of pumped products, a check valve mounted on the flow line to prevent the effect of back pressure on the centrifugal pump, characterized in that inside the production string there is also an electric motor in a sealed version with a cable entry, and the centrifugal pump is fixed with centralizers, at the same time, the string consists of pipes connected by means of a threaded connection, a pressure sensor for measuring the pressure at the inlet to the pumping device is installed on the pipeline in front of the production string, behind the production string X-mas tree, which is gate valves of the ZMS and ZKL types, connected by means of a column flange, a pressure sensor for measuring pressure in the flow line from the pumping device is located behind the X-mas tree, two pipeline lines are installed behind the X-mas tree, one of them is equipped with shut-off valves for carrying out technological operations, on the second pipeline line, shut-off valves for routine maintenance and a flow sensor are installed, a throttle valve is installed behind the check valve to control the volume of fluid flow pumped by the pump.

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