RU2783949C1 - Mobile pumping unit for metered supply of chemicals - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of installations, pumping devices for metered supply of chemical reagents used in the extraction, complex preparation, transport and processing of oil and gas. The unit includes a container mounted on a trailer frame with a wheeled chassis, made in an explosion-proof housing and containing a consumable container for storing a reagent with visual and signaling level gauges, a dosing pump configured for smooth dosing of the reagent supply, a control cabinet, a flow meter, intelligent sensors, a fire alarm and a gas contamination alarm, an electric heating system configured to separately heat the container and the reagent in the container, and an axial fan configured to remove excess heat and explosive gases from the container.

EFFECT: functionality is expanded due to the expansion of areas of application, the accuracy of the measured parameters is increased, and the consumption of the reagent is reduced.

5 cl

Description

The invention relates to the field of installations, pumping devices for metered supply of chemical reagents used in the extraction, complex preparation, transport and processing of oil and gas.

A mobile inhibitor dosing unit is known from the prior art, containing technological equipment installed inside the car body, consisting of two tanks, a plunger pump, a drive, a suction and pressure line with shutoff valves and instrumentation, while it is equipped with additional technological equipment, consisting of tank, plunger pump, drive, suction and pressure lines with shut-off valves and instrumentation (RU 89600 U1 10.12.2009).

Also known is a dosing pump unit including a dosing pump, a dosing pump drive, suction and discharge pipelines, an automated control system, an energy supply system, a reagent tank. The power supply system includes a battery connected to a solar (light) battery, a wind generator, an electric cable, an electric generator driven by an impeller powered by a flow of pumped liquid or gas, a power supply control unit is built into the automated control system. An electric generator driven by an impeller and a corrosion meter are installed on the flow line of an oil or gas well, an oil-gathering or gas-gathering manifold, a reservoir pressure maintenance system water conduit, gas, oil and product pipelines. The installation is made either in the form of a monoblock or consisting of a section of the power supply system, a section with a reagent tank, a section with a dosing pump, a dosing pump drive, an automated control system, and a monoblock, and the sections are made unopened in operational conditions, and on the outside equipped with connectors for connecting electrical cables and hydraulic lines (RU 119019 U1 10.08.2012).

The technical problem is to increase the efficiency of a mobile pumping unit.

The technical result consists in expanding the functionality by expanding the areas of application, increasing the accuracy of the measured parameters and reducing the consumption of the reagent.

The specified technical result is achieved in a mobile pumping unit for the dosed supply of chemical reagents (NUD), which is a container mounted on a trailer frame with a wheeled chassis, made in an explosion-proof housing and containing a consumable container for storing a reagent with visual and signaling level gauges, a dosing pump made with the possibility of smooth dosing of the reagent supply, a NUD control cabinet, a flow meter, intelligent sensors, a fire alarm and a gas alarm, an electric heating system configured to separately heat the container and the reagent in the tank, as well as an axial fan designed to remove excess heat from the container and explosive gases.

At the same time, the container has working and emergency lighting, made with the possibility of switching on in case of loss of voltage in the 380 V network.

At the same time, the pumping unit additionally contains a system for purging technological pipelines.

At the same time, the pumping unit contains high-pressure hoses for connecting process pipelines for pumping the inhibitor into the tank and supplying the inhibitor into the pipeline.

At the same time, intelligent sensors are made with the ability to carry out the processes of measuring technological parameters, converting the received data, self-diagnosis, monitoring and control of the technological process.

The differences from the prototype are that:

NUD is made mobile with installation on a trailer with a wheeled chassis.

Has an explosion-proof design, allowing the use in oil and gas fields, treatment plants, transport, oil and gas tank farms.

Smooth regulation of the dosing of the reagent supply by means of a frequency regulator of the dosing pump drive.

Measurement of all necessary technological parameters with intelligent digital sensors-devices that support the HART protocol, remote control and management.

Availability of an explosion-proof cabinet for digital control and transmission of information to the upper level of the process control system.

A mobile pumping unit for dosing chemical reagents is a unit on a chassis, in which a dosing pump with a tank is installed, instrumentation and automation equipment, automatic control, heating and ventilation systems.

The automation system provides for room temperature control, control of unauthorized access, technological parameters, control and prevention of emergency operation modes, control of pumping units in manual and automatic modes, light and sound alarm in case of fire, gas contamination, shutdown of all current collectors in case of fire, emergency ventilation.

The design of the NUD shelter is an insulated container mounted on a trailer with a wheeled chassis. The base of the container is a welded metal frame made of hot-rolled steel profile, covered with sheet metal and thermally insulated with basalt insulation. The technological compartment contains a consumable container for storing a reagent, for example, an inhibitor/methanol with a visual and signaling level gauge, a diaphragm-plunger dosing pump, piping with shut-off valves, a LPD control cabinet, a flow meter, electrical equipment, smart sensors, fire alarms and gas alarms. In the storage compartment for metal hoses there are cables for connecting to external power, for grounding, a metal hose for connecting to pipelines.

The NUD has an electric heating system with separate heating of the container and the inhibitor/methanol in the tank. An axial fan is provided to remove excess heat and explosive gases from the container.

The container is provided with working and emergency lighting. Emergency lighting is switched on in case of loss of voltage in the 380 V network and is equipped with a built-in battery. The duration of the emergency lighting is 1 hour.

To purge process pipelines at the end of work, a nitrogen purge system is provided.

NUD is equipped with high-pressure hoses for connecting technological pipelines for pumping the inhibitor into the tank and supplying the inhibitor into the pipeline.

All elements of the pumping device are mounted on a frame fixed by a welded joint to a frame (insulated container) made of hot-rolled steel profile, covered with sheet metal and heat-insulated with basalt insulation. The frame is the base of the container. The container is attached to the trailer frame with wheeled chassis, bolted and welded connections.

Explosion-proof design ensures normal operation of the equipment in places where there is a danger of gas or dust explosions, preventing exposure of people to dangerous and harmful explosion factors, ensuring the safety of material assets.

Smooth dosing of the reagent supply is carried out using a dosing pump, with the ability to smoothly control the amount of reagent supply by a pump with a frequency converter. The amount of reagent pumped into the pipeline is determined by the flow meter.

Intelligent sensors-devices perform processes for measuring technological parameters, convert the received data into signals, into analog and digital values, perform self-analysis of work, this allows you to remotely configure and control the measurement range, skip the primary information received and process it, and also perform many simple , typical algorithms for the organization, control and management of the technological process.

The following technological parameters are measured:

Control of gas content in the block box;

Discharge pressure of the dosing pump;

Reagent pressure;

The position of the solenoid valves (open/closed) at the inlet and outlet of the reagent process pipeline;

Reagent level in the container;

The temperature of the supplied reagent;

Reagent consumption.

All parameters are displayed on the PLC screen.

The explosion protection of the digital control and information transmission cabinet is ensured by the design of the cabinet, namely:

Tightness of the cabinet body;

Tightness of cable glands;

The tightness of the controls.

Information can be transmitted via digital and analog, optical, radio, cable communication channels from the PZh of the control cabinet to the process control system.

All information about the technological process is transmitted to the process control system and displayed on the PLC screen:

Gas content in the block box;

Upper/lower level in the reagent storage tank;

Pump on/off;

Valve open/closed;

Reagent temperature;

Reagent pressure;

Reagent consumption data;

The pumping unit works as follows

The process vessel is filled with a reagent, such as an inhibitor/methanol. To control the amount of reagent, a visual, radar and signaling level gauge is provided. NUD is connected to the process pipeline through high pressure hoses. The reagent is supplied by means of a dosing pump with the ability to control the flow rate using a frequency controller. The amount of reagent pumped into the pipeline is determined by the flow meter, the pressure is controlled by pressure sensors and pressure gauges, the liquid level in the tank is controlled by a radar level gauge, level indicators and a visual level gauge. At the end of dosing, before folding the UND, the piping is purged with nitrogen.

Claims (5)

1. A mobile pumping unit for dosing chemical reagents (NUD), which is a container mounted on a trailer frame with a wheeled chassis, made in an explosion-proof housing and containing a consumable container for storing a reagent with visual and signaling level gauges, a dosing pump, made with the possibility of a smooth dosing of the reagent supply, NUD control cabinet, flow meter, intelligent sensors, fire alarm and gas alarm, electric heating system, made with the possibility of separate heating of the container and the reagent in the tank, as well as an axial fan, made with the ability to remove excess heat and explosive gases from the container . 2. Mobile pumping unit according to claim 1, characterized in that the container has working and emergency lighting, while the emergency lighting is made with the ability to turn on when the voltage in the 380 V network is lost. 3. Mobile pumping unit according to claim 1, characterized in that it additionally contains a purge system for process pipelines. 4. Mobile pumping unit according to claim 1, characterized in that it contains high-pressure hoses for connecting process pipelines for pumping the inhibitor into the tank and supplying the inhibitor into the pipeline. 5. The mobile pumping unit according to claim 1, characterized in that the smart sensors are configured to carry out the processes of measuring technological parameters, converting the received data, self-diagnosis, monitoring and control of the technological process.